JP2009143190A - Method for fixing component and structure for fixing component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for fixing a component capable of making a case shared to different components, and adapted to a long hole and floating attachment. <P>SOLUTION: Resin-made locking components 2 composed of at least two sites with different cross-sectional areas, a small cross-sectional area 2A and a large cross-sectional area 2B, respectively, and having laser beam permeability are prepared. A component 3 having through-holes 3A for fixing is placed on a case 1 with laser beam absorbing properties, and by inserting the small cross-sectional areas 2A of the resin-made locking components 2 into the through-holes 3A for fixing, front edges are brought into contact with the case 1 to form contact faces. The large cross-sectional areas 2B which are impossible to be inserted through the through-holes 3A for fixing are pressed in the direction of the contact faces, and the contact faces are irradiated with a laser beam passing these large cross-sectional areas 2B and small cross-sectional areas 2A to weld the case 1 and the resin-made locking components 2 pinching these contact faces. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a method for fixing a part to a resin member and a fixing structure thereof, and more particularly to fixing a part using welding by a laser beam.

  2. Description of the Related Art Conventionally, in order to reduce the weight and cost in various fields, it has been popular to make resinous parts of products, particularly cases that are the outlines of industrial products, into resin molded products. This tendency is particularly noticeable in mass-produced products. In particular, the case is often manufactured by using injection molding that is suitable for mass production and can cope with complicated shapes. Then, a product is formed by fixing the components incorporated therein by various methods.

Further, as a recent trend, a fixing method using members having different properties, for example, a method in which a metal insert nut is embedded in a resin case and a part is fixed with a screw has reached the end of its life. It has become less preferred because it takes time and effort in later recycling work. In addition, since a solvent is used for adhesion, there is a possibility that it may affect the environment and the human body, and further, there is a disadvantage that the curing time is long. And according to these, at the time of molding the case with a mold, a protrusion is formed in advance at a connection point with another member, and this protrusion is inserted into a through hole provided in the other member. Many methods of deforming and crimping the tip of the protrusion have been adopted.

This method will be described with reference to FIG. In FIG. 9, reference numeral 51 denotes a case, 52 denotes another member, 51 </ b> A denotes a protrusion formed on the case 51, and 52 </ b> A denotes a through hole provided in the other member 52. And from the start to the end of the caulking work, it is divided into the states of (a), (b) and (c). (A) has shown the state which has moved the crimping tool 53 to the direction of protrusion 51A. A dome-shaped recess 53A is provided at the tip of the caulking tool 53, and at least the tip is heated to a temperature at which the resin projection 51A is plasticized. (B), the tip of the caulking tool 53 is brought into contact with the projection 51A, the vicinity of the tip of the projection 51A is plasticized by the heat, and further pressed downward, so that the tip of the projection 51A becomes the dome-shaped recess 53A. The state which deform | transformed along the shape is shown.

  (C) shows a state in which the caulking tool 53 is separated from the projection 51A. The deformation of the projection 51A is maintained and solidified, and the diameter of the tip of the projection 51A expanded by this deformation is different from that of other members. The diameter is larger than that of the through-hole 52A provided in 52, and the caulking work is completed. The caulking tool 53 described here plasticizes the tip of the projection 51A by heat (so-called thermal caulking). In addition to this, the tip of the caulking tool 53 is ultrasonically vibrated to thereby generate the projection 51A. A method (so-called ultrasonic caulking) for plasticizing the tip portion of these is also widely used.

  The invention described in Patent Document 1 is a technique for assembling the upper half and the lower half of the disk cartridge by using the heat caulking as described above, and devised the tip shape of the caulking tool and the cooling structure by air blow. In other words, the upper half and the lower half correspond to the upper case and the lower case, and the lower case corresponds to another member for the upper case. In this document, including both the case and the case and the parts fixed to the case as in both cases, in the following, one resin member to be fixed is referred to as a case, and the other member is referred to as a part. And it does not ask | require whether the raw material is resin regarding the other member.

JP 2000-228074 A (2nd page, FIG. 1)

However, it is necessary to project the protrusion from the resin case side in any of the techniques (thermal caulking) or ultrasonic caulking described with reference to FIG. And the position which provides the protrusion is limited to the position of the through hole for fixation of the component which was planned as the object of fixation. In most cases, this protrusion is dug into a mold and formed at the stage of injection molding. However, when this is the case of a mass-produced series product, a method of using this case as a common part for a plurality of product types is usually employed. This is because extremely expensive types of molding dies can be reduced.

  However, when the position of the fixing through hole of the component to be fixed differs depending on the product type, the protrusion provided on the cover becomes an obstacle to attachment. This is because, if the fixing method in which the insert nut is embedded in the cover as described above is adopted, the insert nut may be arranged at all the positions of the fixing through holes of the plurality of parts. In the case of the protrusion, it is considered that the protrusion that is not used for fixing interferes with the component. Further, when the component to be fixed is a commercial product, there arises a problem that the position of the fixing through hole is changed due to the mounting of the substitute product due to the suspension of the manufacturing of the component or the specification change of the component.

  In addition, since heat caulking and ultrasonic caulking are the results of caulking work, that is, the caulking state is almost dependent on the caulking work, there is a possibility of causing problems as shown in FIG. 10 depending on the accuracy of the work. FIG. 10 is a cross-sectional view showing a state where heat caulking or ultrasonic caulking has been completed. Reference numeral 54 is a case, 55 is a component, 54A is a deformed protrusion, and 55A is a fixing through hole. FIG. 10A shows a state where the position of the caulking tool is shifted to the right as viewed in the figure. In a state where only one side of the deformed protrusion 54A is in contact with the edge of the fixing through hole 55A, there is a high possibility that the external force may cause breakage between the non-deformed portion and the deformed portion of the protrusion 54A.

  FIG. 10B shows a state in which the material of the component 55 is also a resin. However, the heating time while pressing with the caulking tool is long, or the tool becomes too hot, and thus the through hole 55A together with the protrusion 54A. It is deformed so as to crush the periphery. In such a state, there is a high possibility that the external force will cause breakage around the fixing through hole 55A of the component 55. In general, an injection molded product shrinks by several percent when the dimension of the molded product returns to room temperature. The mold is manufactured with this shrinkage factor in mind, but due to variations in molding conditions and the like, dimensional accuracy such as metal processing cannot be expected for the molded product.

  Therefore, when heat caulking or ultrasonic caulking a component with multiple fixing points, as shown in FIGS. 9 and 10, the diameter of the fixing through hole is larger than that of the protrusion with a margin. In general, the diameter is sufficient (clearance is sufficient). However, in mounting a component that still requires mounting accuracy, such as a lens that is an optical system component, as shown in FIG. 11A, the clearance of one fixing portion 56 is made as small as possible, and the pitch of the other fixing portion 57 is set. A method is conceivable in which sufficient clearance in the direction is taken, that is, the elongated hole 58A is used as a fixing through hole.

  When heat caulking or ultrasonic caulking is used for such a fixing method, the projection after caulking is in a state as shown in FIG. FIG. 11 (b) is a view showing the section of the arm shown in FIG. 11 (a), and the clearance of one fixing portion 56 is made as small as possible and is not drawn in the drawing. However, in the caulking state at the other fixing portion 57, since there is no part 58 to be pressed in the longitudinal direction of the long hole 58A, the deformed portion of the protrusion is solidified in a state of hanging down in the air, and the fixing strength is significantly reduced.

In addition, when a part such as a connector intended to be fitted with another part after assembly is fixed to the case, a method called floating attachment is widely used. FIG. 12 depicts this floating attachment, and FIG. 12 (a) is a plan view showing a state in which the substrate 59 on which a connector or the like is mounted is fixed to the case. The substrate 59 is provided with two fixing holes 59A which are long holes. It is supported by the case 60 so as to be movable in the direction of arrow A. Here, when normal heat caulking or ultrasonic caulking is performed, the deformed protrusion 60A completely presses the edge of the elongated hole as shown in FIG. 12B showing the Wu cross section of FIG. Thus, the substrate 59 cannot move in the direction of arrow a.

  Therefore, in such a case, as shown in FIG. 12 (c), which shows a Wu cross section, the seated spacer 61 must be fitted into the protrusion, and then heat caulking or ultrasonic caulking must be performed. In this way, a slight gap 62 can be provided between the substrate 59 and the seat of the seated spacer 61, and movement in the direction of arrow A is possible. Therefore, in such an attachment method, not only an additional component called the seated spacer 61 is required, but also a material that does not cause slight deformation when the projection is caulked, for example, a metal seated spacer, must be used.

  Therefore, the present invention does not use metal or other materials other than resin and adhesive when fixing the resin cover to the part, and the work time required for fixing is short, and it corresponds to the change in the position of the through hole for fixing the part. The present invention was created to provide a fixing structure and a fixing method that are possible and that the state (shape) after fixing does not depend on the fixing work, and that can also be fixed to a long hole or can be floating mounted.

  The present invention provides, as a first aspect, a fixing method for fixing a part having a through hole for fixing to a case (resin member), wherein at least two different sections of a small cross-sectional area part and a large cross-sectional area part are provided. A resin-made locking part having a part having an area and having a laser beam permeability is prepared, and a part having the fixing through hole is placed on the case having a laser beam absorbing property. The small cross-sectional area of the resin locking part is inserted into the case so that the tip abuts against the case to form a contact surface, and the large cross-sectional area that cannot be inserted into the fixing through-hole is formed. The case that presses in the direction of the contact surface and irradiates the contact surface with laser light that has passed through the large cross-sectional area portion and the small cross-sectional area portion. Fixing method of parts characterized by welding to fastening parts and shape by this method Providing a fixing structure to be.

In addition, as a second aspect of the present invention, by providing a recess in the case, the tip of the small cross-sectional area of the resin locking part that penetrates the fixing through hole is fitted into the recess, The first aspect is characterized in that the contact surface between the bottom surface of the recess and the tip is irradiated with laser light, and the case and the resin locking part sandwiching the contact surface are welded. And a fixing structure formed by this method.

Moreover, this invention is a fixing method for fixing the part provided with the through-hole for fixing to the case (resin member) as a third aspect, and includes a small cross-sectional area portion, an interrupted area portion, and a large cross-sectional area portion. A resin locking part made of at least three different cross-sectional areas and having laser beam transparency is prepared, and a part having the fixing through-hole in the case having a laser beam absorption and a recess is provided. Place the small cross-sectional area portion and the interrupted area portion of the resin locking part into the fixing through-hole of this part, so that the tip of the small cross-sectional area portion contacts the bottom surface of the recess provided in the case. A contact surface is formed by contact, and the large cross-sectional area that cannot be inserted into the fixing through-hole is pressed in the direction of the contact surface, and the large cross-sectional area, the interrupted area, and the small cross-sectional area are pressed. Irradiating the contact surface with laser light transmitted through a portion, and the case sandwiching the contact surface Characterized by welding the serial resin fastening elements to provide a fixing method and a fixing structure formed by the method of part.

Further, according to a fourth aspect of the present invention, as the fourth aspect, the case is a member having a laser light transmission property, the resin locking component is a component having a laser light absorption property, and the laser light transmitted through the case is in contact with the contact portion. A method for fixing a component according to any one of the first to third aspects, characterized by irradiating a surface, and a fixing structure formed by this method are provided.

  According to the first aspect of the present invention, when fixing a part provided with a fixing through hole to a case that is a resin member, the structure is fixed only with resin without attaching a metal part such as an insert nut to the case. Can be formed. In addition, since it is not necessary to provide a protrusion on the case and insert it into the fixing through hole, the case can be shared with a plurality of types of components having different positions of the fixing through hole. Furthermore, since the large cross-sectional area of the resin locking part that locks the periphery of the fixing through hole is not deformed during welding, the hole shape of the fixing through hole is a long hole or slit as shown in FIG. Even so, it can be firmly fixed.

  Further, according to the second aspect of the present invention, the resin-made locking part is attached to the laser beam by providing a recess in the case at a position corresponding to the fixing through hole of the part that is supposed to be attached. At the time of welding, the tip of the small cross-sectional area of the resin locking part can be fitted into the recess of the case. This becomes positioning and prevention of displacement of the resin locking parts, and the fixing operation of the parts becomes accurate and easy.

  Further, according to the third aspect of the present invention, the small cross-sectional area portion is fitted in the recess of the case to prevent positioning and displacement, and the small cross-sectional area portion and the interruption area of the resin locking part Since the step of the step with the part abuts the peripheral edge of the recess, the peripheral edge of the recess after welding and the resin locking part regardless of the degree of melting between the tip of the small cross-sectional area and the bottom surface of the recess The distance from the large cross-sectional area portion is constant (the length of the interrupted area portion). Therefore, even in the case of floating attachment as shown in FIG. 12, it is possible to attach without using a separate component such as the spacer 61 with a seat.

  Further, according to the fourth aspect of the present invention, the choices of materials for the case and the resin locking part are widened, and the possibility that the respective mechanical properties and appearance can be made higher in quality is increased. Further, since the irradiation direction of the laser beam can be selected, the selection range of available welding apparatuses and the limited range of welding work methods are widened.

  Next, a component fixing method and a component fixing structure according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view showing a first embodiment of a component fixing method and structure according to the present invention. In FIG. 1, reference numeral 1 denotes a case, which is made of a resin member having laser light absorption. Reference numeral 2 denotes a resin locking part having laser beam transparency, which is composed of a small cross-sectional area part 2A and a large cross-sectional area part 2B, and each part is drawn as a rectangle whose side faces are continuous in the drawing. However, three-dimensionally, the small cross-sectional area 2A is a small-diameter cylindrical shape, and the large cross-sectional area 2B is a large-diameter cylindrical shape. In the present embodiment, a cylindrical shape is adopted, but this may be a prismatic shape, and may be configured by a cylindrical portion and a prismatic portion. Reference numeral 3 denotes a component fixed to the case 1, and two fixing through holes 3A are illustrated in the drawing.

  FIG. 1A shows a state before the component 3 is fixed to the case 1, and the component 3 is placed on the case 1 as indicated by an arrow, and the resin engagement is made in the fixing through hole 3 </ b> A of the component 3. When the small cross-sectional area 2A of the stop part 2 is inserted, the state shown in FIG. Then, using the laser welding machine shown in FIG. 1 (c), the component fixing operation by laser welding is started. The laser welding machine used in this embodiment includes a laser head 4, a laser light generation source (not shown), and an optical fiber 5 that guides the laser light output from the laser light generation source to the laser head 4. The laser head 4 is held by a jig (not shown) so as to be movable up and down, and is configured so that the lower end of the laser head 4 can press the resin locking component 2 from above.

  Next, the welding operation between the case 1 and the resin locking part 2 will be described with reference to FIG. FIG. 2 is a detailed view of the main part of FIG. 1C, and the laser head 4 is also shown in a sectional view. The laser head 4 used in this embodiment is fixed to a main body 6 through which an optical fiber 5 penetrates, a light guide 7 that guides laser light emitted from a light exit end 5A of the optical fiber 5, and a lower end of the light guide 7. And a condensing lens group 9 that condenses the laser light diffused and emitted from the light exit end 5A. Here, when the laser head 4 moves downward, the glass plate 8 presses the large cross-sectional area 2B of the resin locking part 2 downward, and the pressing force is applied to the tip of the small cross-sectional area 2A and the case 1. The contact surface 10 is provided.

  Further, the condensed laser light is transmitted through the resin locking part 2 having laser light permeability and heats the surface of the case 1 having laser light absorption. Then, the case 1 sandwiching the contact surface 10 and the resin locking part 2 are welded by this heat, and the large cross-sectional area 2B of the resin locking part 2 that cannot be inserted through the fixing through hole 3A of the part 3 is formed. The periphery of the fixing through hole 3A is locked. Here, a slight gap 11 is formed between the peripheral edge of the fixing through hole 3A and the large cross-sectional area 2B of the resin locking part 2 in a state before welding so that a pressing force is generated on the contact surface 10. The length of the small cross-sectional area 2B is set so that When the contact surface melts while receiving the pressing force, the large cross-sectional area 2B comes into contact with the periphery of the fixing through hole 3A, and the gap 11 does not exist.

  By fixing the components in this way, it is possible to fix a plurality of types of components having different positions of the fixing through holes to the case having the same shape as shown in FIG. FIG. 3 is a perspective view showing a case where two different parts are fixed to a case having the same shape. In FIG. 3, reference numeral 12 denotes a case, which has six protruding portions 12A. The protrusion 12A corresponds to the four fixing through holes provided in the component 13 shown in FIG. 3A and the four fixing through holes provided in the component 13 ′ shown in FIG. 3B. There are six places in total, since two of them are shared.

Further, the projecting portion 12A is provided in a shape slightly projecting from the bottom surface of the case 12 so that the flat upper surface has a sufficiently larger area than the through hole for fixing, and the entire lower surfaces of the parts 13 and 13 'are formed on the case. 12 is provided so as not to be in close contact with the bottom surface of 12. Therefore, it is not an essential element for the implementation of the present invention. If the fixing through-hole is fixed by the method described with reference to FIGS. 1 and 2 using the resin locking part 14 in such a combination of the case and the part, the part 13 or the part 13 ′ is the same. It can be fixed to the shape case 12.

  Next, a second embodiment of the component fixing method and structure according to the present invention will be described with reference to FIG. In FIG. 4, reference numeral 15 denotes a case, and a recess 15A is provided in advance. The component 3 is provided with a fixing through-hole 3A as in the first embodiment described with reference to FIGS. In addition, the resin locking part 16 is a laser light-transmitting part composed of a small cross-sectional area part and a large cross-sectional area part as in the first embodiment described with reference to FIGS. 1 and 2. However, the length of the small cross-sectional area is set to a size different from that of the resin locking part 2 shown in FIG.

  4B, when the component 3 is placed on the case 15 and the small cross-sectional area 16A of the resin locking component 16 is inserted into the fixing through-hole 3A, The tip of the area portion 16A and the recess 15A of the case 15 are fitted, and the contact surface 17 is formed by this tip and the bottom of the recess 15A. Next, when the large cross-sectional area 16B of the resin locking member 16 is pressed in the direction of the contact surface 17 with the tip of the laser head 4 in this state, a pressing force is applied to the contact surface 17. At this time, the length of the small cross-sectional area portion 16A is set longer than the resin locking part 2 used in the first embodiment described with reference to FIGS. 1 and 2 by the depth of the recess 15A. Therefore, a gap 18 similar to the slight gap 11 shown in FIG. 2 is formed between the peripheral edge of the fixing through-hole 3A and the large cross-sectional area portion 16B. In this state, laser light is irradiated from the laser head 4, so that welding is performed in the same manner as in the first embodiment, and the component 3 can be fixed to the case 15.

    Next, a third embodiment of the component fixing method and structure according to the present invention will be described with reference to FIG. In FIG. 5, the case 19 is substantially the same as the case 15 of the second embodiment described with reference to FIG. 4, but the recess 19 </ b> A provided in advance is slightly smaller in area than the recess 15 </ b> A of the case 15. . The component 3 is provided with a fixing through hole 3A as in the second embodiment described with reference to FIG. Further, the resin latching component 20 is composed of three different portions, that is, a small cross-sectional area portion 20A, an interrupted area portion 20B, and a large cross-sectional area portion 20C, and is a component having laser light transmittance.

  Then, as shown in FIG. 5B, the component 3 is placed on the case 19, and the small cross-sectional area portion 20A and the interrupting area portion 20B of the resin locking component 20 are inserted into the fixing through hole 3A. Then, the small cross-sectional area 20A and the recess 19A of the case 19 are fitted, and the contact surface 21 is formed by the tip of the small cross-sectional area 20A and the bottom surface of the recess 15A. At this time, the length of the small cross-sectional area portion 20A is set so that a slight gap 22 is generated between the peripheral edge of the recess 19A and the interrupted area portion 20B. Next, in this state, the large cross-sectional area portion 20 </ b> C of the resin locking member 20 is pressed toward the contact surface 21 by the tip of the laser head 4, and a pressing force is applied to the contact surface 21.

When laser light is irradiated from the laser head 4 in this state, the contact surface 21 is welded and the gap 22 does not exist as in the first and second embodiments. Here, the peripheral edge of the recess 19 </ b> A and the interruption area portion 20 </ b> B are in contact with each other, but since the laser beam is not irradiated on the contact surface, the interruption area portion 20 </ b> B is not buried in the case 19. Therefore, by setting the length of the interrupting area portion 19B in advance to be longer than the thickness of the peripheral edge of the fixing through hole 3A of the component 3, the gap between the large cross-sectional area portion 20C and the peripheral edge of the fixing through hole 3A is set. The gaps 23 can be created at desired intervals, and a floating attachment can be achieved. In addition, the second and third embodiments described so far can be implemented in the same manner as the first embodiment with respect to sharing the case for different parts described in the first embodiment with reference to FIG. Needless to say.

  Next, fourth to sixth embodiments of the component fixing method and structure according to the present invention will be described with reference to FIGS. In FIG. 6 which shows 4th Embodiment, the code | symbol 24 is the stage provided so that raising / lowering was possible, 25 was the glass plate fixed horizontally, 26 is a laser head which inject | emits a laser beam. Further, since the component 3 is equivalent to that used in the first embodiment described with reference to FIGS. 1 and 2, the same reference numerals are given, but the case 1 ′ has laser beam transparency, The resin locking part 2 ′ is different from that of the first embodiment in that the resin locking part 2 ′ has laser light absorption.

  Here, the stage 24 is provided with a protrusion 24A, and when the stage 24 is raised, the large cross-sectional area portion of the resin locking part 2 ′ is pressed upward. On the other hand, the glass plate 25 is fixed so as not to move up and down, and a pressing force is applied to the contact surface 10 ′ sandwiched between them. Further, unlike the laser head 26 used in the first embodiment, a glass plate is not provided at the tip. In this state, when laser light is emitted from the laser head, the laser light transmitted through the glass plate 25 and the laser light transmitting case 1 'is irradiated onto the contact surface 10', and this portion is welded. Thus, the fixing of the component 3 is achieved.

  In FIG. 7 showing the fifth embodiment, the stage 24, the glass plate 25, and the laser head 26 are the same as those shown in FIG. 6, and the component 3 is the second embodiment described based on FIG. The case 15 'has a laser beam transmissivity, and the resin locking part 16' has a laser beam absorptivity. Different from the second embodiment. The contact surface 17 'is constituted by a bottom surface of a recess provided in the case 15' and a tip of a small cross-sectional area portion of the resin locking part 16 '. Here, as in the fourth embodiment, a pressing force is applied to the contact surface 17 ′, and further, the laser light transmitted through the glass plate 25 and the laser light transmitting case 15 ′ is applied to the contact surface 17 ′. By doing so, this part is welded and the fixing of the component 3 is achieved.

  In FIG. 8 showing the sixth embodiment, the stage 24, the glass plate 25, and the laser head 26 are the same as those shown in FIGS. 6 and 7, and the component 3 is the third described with reference to FIG. Since the same reference numerals are used, the case 19 'has a laser beam transmission property, and the resin locking part 20' has a laser beam absorption property. This is different from the third embodiment. The abutting surface 21 'is composed of a bottom surface of a recess provided in the case 19' and a tip of a small cross-sectional area portion of the resin locking part 20 '. Here, as in the fourth and fifth embodiments, a pressing force is applied to the contact surface 21 ′, and further, the laser light transmitted through the glass plate 25 and the case 19 ′ having the laser light transmission property is contacted with the contact surface 21. By irradiating ′, this part is welded and the fixing of the part 3 (floating mounting) is achieved. In the first to third embodiments described so far, the component 3 is placed on the case by its own weight. However, in the fourth to sixth embodiments, the top and bottom can be reversed. In this case, the component 3 is placed on the case by its own weight. Therefore, in the first to sixth embodiments, the vertical direction can be freely selected, and the placement of the component 3 may be placement that does not depend on its own weight.

Sectional drawing which shows the 1st Embodiment of this invention Sectional drawing which shows the 1st Embodiment of this invention The perspective view which shows the 1st Embodiment of this invention Sectional drawing which shows the 2nd Embodiment of this invention Sectional drawing which shows the 3rd Embodiment of this invention Sectional drawing which shows the 4th Embodiment of this invention Sectional drawing which shows the 5th Embodiment of this invention Sectional drawing which shows the 6th Embodiment of this invention Sectional view showing conventional technology Sectional view showing conventional technology Plan view and sectional view showing conventional technology Plan view and sectional view showing conventional technology

Explanation of symbols

1, 1 ', 12, 15, 15', 19, 19 'Case 2, 2', 14, 16, 16 ', 20, 20' Resin locking parts 3, 13, 13 'Parts 4, 26 Laser head DESCRIPTION OF SYMBOLS 5 Optical fiber 6 Main body part 7 Light guide part 8, 25 Glass plate 9 Condensing lens group 10, 10 ', 17, 17', 21, 21 'Contact surface 11, 18, 22, 23 Gap 24 Stage

Claims (7)

A fixing method for fixing a component having a fixing through-hole to a resin member, the resin having at least two different cross-sectional areas, a small cross-sectional area part and a large cross-sectional area part, and having laser light transmittance A product-made locking part is prepared, a part having the fixing through hole is placed on the resin member having laser light absorption, and the resin locking part is cut into the fixing through hole. By inserting the area portion, the tip is brought into contact with the resin member to form a contact surface, and the large cross-sectional area portion that cannot be inserted into the fixing through hole is pressed in the direction of the contact surface. At the same time, the laser beam transmitted through the large cross-sectional area portion and the small cross-sectional area portion is irradiated to the contact surface, and the resin member and the resin locking component sandwiching the contact surface are welded. A method of fixing a component characterized by the above. By providing a recess in the resin member, the tip of the small cross-sectional area of the resin locking part that penetrates the fixing through-hole is fitted into the recess, and the bottom surface of the recess and the tip 2. The component fixing method according to claim 1, wherein a laser beam is irradiated on a contact surface of the resin member and the resin member sandwiching the contact surface is welded to the resin locking component. A fixing method for fixing a component having a through hole for fixing to a resin member, comprising a portion having at least three different cross-sectional areas, a small cross-sectional area part, an interrupted area part, and a large cross-sectional area part. A resin-made locking part is prepared, and a part provided with the fixing through-hole is placed on the resin-made member having laser light absorption and a recess, and the fixing through-hole for this part is mounted. By inserting the small cross-sectional area portion and the interrupting area portion of the resin locking part into the bottom, the tip of the small cross-sectional area portion is brought into contact with the bottom surface of the recess provided in the resin member to form a contact surface. The large cross-sectional area that cannot be inserted into the fixing through-hole is pressed in the direction of the contact surface, and the laser light transmitted through the large cross-sectional area, the interrupted area, and the small cross-sectional area is Irradiate the contact surface, and weld the resin member and the resin locking part sandwiching the contact surface. Method of fixing parts, characterized in that. The resin member is a laser light transmitting member, the resin locking component is a laser light absorbing component, and the contact surface is irradiated with laser light transmitted through the resin member. The component fixing method according to claim 1, wherein the component is fixed. A fixing structure for fixing a part having a fixing through-hole to a resin member, having a resin locking part, and either the resin locking part or the resin member Has a laser beam transmissivity and the other has a laser beam absorptivity, and the resin locking part comprises at least two different cross-sectional areas, a small cross-sectional area part and a large cross-sectional area part, The tip of the small cross-sectional area that penetrates the fixing through-hole and the resin member are welded, and the large cross-sectional area that cannot be inserted into the fixing through-hole engages the periphery of the fixing through-hole. Parts fixing structure characterized by being stopped. 6. The resin member according to claim 5, wherein a recess is provided in the resin member, and a tip of the small cross-sectional area that penetrates the fixing through-hole and a bottom surface of the recess are welded. Parts fixing structure. A fixing structure for fixing a part having a fixing through-hole to a resin member, having a resin locking part, and either the resin locking part or the resin member Has a laser beam transmissivity, and the other has a laser beam absorption property, and the resin locking part has at least three different cross-sectional areas, a small cross-sectional area part, an interrupted area part and a large cross-sectional area part. The resin member is provided with a recess, and a tip of the small cross-sectional area that penetrates the fixing through-hole and a bottom surface of the recess provided in the resin member are welded, The step portion between the cross-sectional area portion and the interrupted area portion is in contact with the peripheral edge of the recess, and the large cross-sectional area portion that cannot be inserted into the fixing through-hole extends the peripheral edge of the fixing through-hole. A component fixing structure characterized by being locked.

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