JP6832006B2 - Manual laser welding device with irradiation guide - Google Patents

Description

The present invention relates to a laser welding device that irradiates a laser beam to perform soldering, welding of synthetic resin, and the like. More specifically, the present invention can be held in one hand to perform manual welding, and welding of extremely small parts can be performed. It relates to a manual laser welding device which is also suitable for.

For example, a soldering iron is generally used when the leads of electronic components are manually soldered to an electrode portion formed on a circuit board. As disclosed in Patent Document 1, this soldering iron has a soldering tip at the tip of a handle for holding in one hand, and also has a heater inside a case surrounding the soldering tip, and the soldering iron has the heater. The tip is heated, the electrode portion and the lead are heated by the heated handle, the solder is melted, and the lead is adhered to the electrode portion by the melted solder.
On the other hand, in recent years, the miniaturization of the electronic components has progressed, and along with this, the parts to be soldered such as the electrode portion and the lead have also been minimized. Therefore, the tip of the soldering iron is also miniaturized accordingly. Is now required.

However, reducing the size of the tip of the soldering iron has a limit in terms of durability. For example, if the tip diameter of the trowel tip is formed to 0.2 mm and the trowel tip is heated to 380 degrees and soldered, the life of the trowel tip is short because it is eroded by tin, which is the main component of the solder. It has been confirmed by experiments that it takes about 2 hours. For this reason, it has been practically impossible to solder a very small part using a soldering iron.

On the other hand, a laser soldering device that uses laser light is also known. As disclosed in Patent Document 2, this laser soldering device is a device in which a laser generator that generates laser light and an irradiation head having a built-in condenser lens are connected by an optical fiber, and the laser generator. The laser beam generated in the above is guided to the irradiation head through the optical fiber, condensed by the condensing lens and irradiated to the soldered portion, and the solder is melted and soldered by the energy.
Since this laser soldering device can solder the soldered part in a non-contact manner with the solder, there is no problem of tin erosion, and the irradiation diameter of the laser light can be narrowed down to a small size. Soldering can also be done.

However, since the conventional laser soldering device has the device configuration as described above, the whole is very large, and therefore, it can only be used by being attached to a soldering robot. Therefore, there is a demand for the emergence of a simple and compact laser soldering device that can be manually soldered. Further, when manually irradiating the soldered portion with the laser beam, it is necessary to stabilize the posture of the soldering device to prevent erroneous irradiation due to camera shake or the like. These problems are the same in a welding device that welds a synthetic resin.

Jikkai Sho 62-56272 Japanese Unexamined Patent Publication No. 2001-198670

The subject of the present invention is a manual laser welding device having excellent usability, which can be held in one hand to perform manual welding, is suitable for welding extremely small parts, and does not cause erroneous irradiation due to camera shake or the like. Is to provide.

In order to solve the above problems, according to the present invention, a laser module that emits laser light by oscillating a light emitting element with a laser is built in a body configured to perform welding work while holding it in one hand. An irradiation member that irradiates the welding target site with the laser light emitted from the laser module through an optical fiber and an irradiation guide for preventing erroneous irradiation due to camera shake are provided, and the irradiation guide is attached for attachment to the body. It is characterized by having a portion, an arm portion extending from the mounting portion along the optical fiber, and a contact portion formed at the tip of the arm portion so as to partially abut the periphery of the welding target portion. A manual laser welding device with an irradiation guide is provided.

In the present invention, the irradiation guide is removable with respect to the body.
The irradiation guide has an aiming portion at the tip of the arm portion, and the aiming portion has a frame shape, and the laser light from the irradiation member is directed to the inside of the frame of the aiming portion. Desirably, and more preferably, the aiming portion also serves as the contact portion.
Further, preferably, in the present invention, the aiming portion extends from the tip of the arm portion toward the diagonally front side of the body on the upper surface side of the body, and the angle formed by the aiming portion and the arm portion is an obtuse angle. Is to be.

According to one specific configuration embodiment of the present invention, the irradiation member has a fiber holder that also serves as an optical connector, and a base end portion is held by the fiber holder so that the tip portion extends forward from the fiber holder. It has an optical fiber and is detachably attached to the body.

Further, according to the present invention, it is attached to a manual laser welding device that performs welding work by irradiating a welding target site with laser light from an optical fiber while holding it in one hand to prevent erroneous irradiation due to camera shake during laser light irradiation. An irradiation guide for this is provided.
The irradiation guide includes a mounting portion for mounting on the laser welding device, an arm portion extending from the mounting portion along the optical fiber , and a portion of the tip of the arm portion around the welding target portion. It has an abutting portion formed so as to abut.

In the present invention, preferably, the irradiation guide has an aiming portion at the tip of the arm portion, the aiming portion has a frame shape, and laser light is applied to the welding target portion inside the frame of the aiming portion. It is formed to irradiate.
In this case, it is desirable that the aiming portion also serves as the contact portion, and more preferably, the aiming portion extends obliquely forward from the tip of the arm portion, and the aiming portion and the arm portion are extended. The angle between them is obtuse.

The laser welding device of the present invention can not only be held in one hand to perform the welding work manually, but is also suitable for welding a very small portion, and when performing the welding work, the contact portion of the irradiation guide is used. Since the posture of the welding device can be stabilized by abutting on the periphery of the welding target portion, erroneous irradiation due to camera shake or the like can be prevented.

It is a top view which shows 1st Embodiment of the soldering apparatus which is a typical example of the laser welding apparatus which concerns on this invention. It is a side view of FIG. It is sectional drawing of FIG. It is a partially enlarged view of FIG. It is a circuit diagram which shows an example of the electric / optical circuit of a soldering apparatus. It is a circuit diagram which shows another example of the electric / optical circuit of a soldering apparatus. It is an exploded view of FIG. It is a perspective view of the irradiation member. It is sectional drawing of the main part in the disassembled state which shows the deformation example of an irradiation member. It is a perspective view of an irradiation guide. It is an enlarged side view of the main part of the soldering apparatus which shows the different mounting styles of an irradiation guide. It is a side view of the state which soldering is performed by the soldering apparatus of 1st Embodiment. It is a top view of the main part of FIG. It is a perspective view which shows the 1st modification of an irradiation guide. It is sectional drawing which shows the 2nd modification of an irradiation guide. A third modification of the irradiation guide is shown, where (a) is a perspective view thereof and (b) is a cross-sectional view thereof. It is a main part perspective view which shows the 4th modification of an irradiation guide. It is a side view of the main part which shows the state at the time of soldering using the irradiation guide of 4th modification. It is a perspective view which shows the 5th modification of an irradiation guide. It is a partial side view which shows the other modification of the soldering apparatus of 1st Embodiment. It is a side view which shows the modification of the laser module. It is a front view which shows the other modification of a laser module. It is a side view which shows the 2nd Embodiment of the soldering apparatus which concerns on this invention.

The figure shows a soldering device as a typical example of the manual laser welding device according to the present invention. As shown in FIG. 12, this soldering device is used to irradiate the electrode portion 11a formed on the circuit board 11 with the lead 12a of the electronic component 12 with a laser beam to solder the lead 12a. Is. Therefore, the following description will be given for this soldering device.

As shown in FIGS. 1 to 4, the soldering device 1A of the first embodiment has a pen-shaped body 2 configured to be held in one hand. The body 2 is formed of a hollow shape made of metal, synthetic resin, or the like, and has a main body portion 2a that also serves as a grip portion and a conical portion 2b formed so as to gradually taper to the tip of the main body portion 2a. The main body portion 2a and the conical portion 2b are arranged substantially straight along the axis L. Further, when the tip of the body 2 is irradiated with the laser beam LB and soldered, the body 2 is positioned and its posture is stabilized in order to prevent erroneous irradiation due to camera shake or the like. An irradiation guide 3 is provided.

With reference to the circuit diagram of FIG. 5, a circuit board in which a laser module 5 made of a semiconductor laser and a control circuit 7 for controlling the entire soldering device 1A including the laser module 5 are mounted inside the body 2. 6 and a rechargeable battery 8 for supplying power to the laser module 5 and the control circuit 7 are arranged and built in the above-mentioned order from the front end side to the rear end side of the body 2. An irradiation member 9 for irradiating the laser beam LB emitted from the laser module 5 toward the soldering portion 10 (see FIG. 12) is attached to the tip of the conical portion 2b of the body 2.

Further, on the outer surface of the body 2, a power switch 13 for opening and closing the power circuit 14 connecting the control circuit 7 and the battery 8 and a mode switching button 15 for switching the control mode by the control circuit 7 are provided. An irradiation button 17 that opens and closes the irradiation circuit 16 that connects the control circuit 7 and the laser module 5 and turns the laser module 5 on and off to irradiate and stop the laser beam LB, and turns the laser module 5 on and off. An indicator lamp 18 that lights up and turns off in conjunction with the above, and a display unit 19 that displays the operating state of the soldering device 1A are provided. In addition, in FIG. 2, the description of the electric wiring is omitted.

The laser module 5 emits laser light LB from the light emitting element 20 by passing a current through the light emitting element 20 made of a semiconductor and causing the light emitting element 20 to oscillate the laser. The module is made of synthetic resin, metal, or the like. The light emitting element 20 and a plurality of optical lenses 22a, 22b, 22c are built in the case 21 along the optical axis, that is, the axis L, and the laser light LB focused by the optical lenses 22a, 22b, 22c. Is configured to be emitted toward the irradiation member 9 from the exit port 5a formed at the tip of the module case 21. The laser light LB is set to, for example, a wavelength of 800 to 1000 nm and an output of about 3.5 to 5 W.

Further, the laser module 5 is provided with a guide light generating element 25 for emitting a guide light GB composed of infrared light in the visible light region, and the guide light generating element 25 is attached to the laser light LB. The guide light GB emitted in the direction orthogonal to the optical axis L is bent in the direction of the optical axis L by the semitransparent mirror 26, and is configured to be emitted along the optical axis L. The semitransparent mirror 26 has a property of transmitting laser light LB but totally reflecting visible light. The guide light generating element 25 may be provided inside or outside the module case 21.

When the soldering portion 10 is irradiated with the laser beam LB and soldered, the guide light GB irradiates the soldering portion 10 with the guide light GB in advance to aim at the irradiation position of the laser beam LB. It is for matching and is set to a lower output (about 5 mW) than the laser light LB.

In FIG. 5, the semitransparent mirror 26 is arranged between the first optical lens 22a and the second optical lens 22b, and the guide light GB emitted from the guide light generating element 25 is the semitransparent mirror. After being reflected by 26, it is emitted through the second optical lens 22b and the third optical lens 22c. As shown in FIG. 6, the semitransparent mirror 26 is outside the third optical lens 22c. It is also possible to dispose of it on the (front side) so that the guide light GB emitted from the guide light generating element 25 is reflected by the semitransparent mirror 26 in the optical axis L direction and directly incident on the irradiation member 9.

As is clear from FIGS. 4, 7, and 8, the irradiation member 9 has a fiber holder 30 that also serves as an optical connector, and a base end portion is held by the fiber holder 30, and the tip end portion is forward from the fiber holder 30. It has an optical fiber 31 extending to.
The fiber holder 30 is a cylindrical component having a diameter smaller than that of the body 2, has a fiber insertion hole 32 in which the optical fiber 31 is inserted at the center thereof, and protects the optical fiber 31 at a tip portion thereof. It has a thin tubular protective tube portion 33 and a mounting portion 30a at the base end portion, and the mounting portion 30a is inserted into a mounting hole 2d opened at the tip of a conical portion 2b of the body 2. By doing so, it is detachably attached to the body 2.

Further, an incident port 32a facing the base end portion of the optical fiber 31 is formed at the base end portion of the mounting portion 30a, and the incident port 32a is formed inside the body 2 at the exit port 5a at the tip of the laser module 5. By facing each other, the laser module 5 and the fiber holder 30 are optically connected.

The irradiation member 9 is detachably attached to the body 2. For this attachment, the attachment portion 30a of the fiber holder 30 is formed with a columnar tip portion 30b and a polygonal or other non-circular rotation prevention portion 30c such as a hexagon. On the other hand, in the mounting hole 2d of the body 2, a circular hole portion 2e into which the tip portion 30b is fitted and a non-circular hole portion 2f into which the rotation prevention portion 30c is fitted are formed, and the non-circular hole portion 2f is formed. A permanent magnet 34 is attached to the bottom of the hole, and the permanent magnet 34 and the rotation prevention portion 30c formed of a magnetic material such as iron are attracted to each other by magnetic force to cause the irradiation member 9 to be attracted to each other. However, the body 2 is stably attached to the body 2 in a predetermined fixed direction in a posture in which rotation is restricted.

However, other mounting methods can also be used. For example, as shown in FIG. 9, a male screw portion 30d is formed in a part of the mounting portion 30a, a female screw portion 2g is formed in a part of the mounting hole 2d, and the male screw portion is formed in the female screw portion 2g. A method of screwing the portion 30d can also be used.

Since the irradiation member 9 is removable from the body 2, it can be replaced with another irradiation member 9 having a different wire diameter of the optical fiber 31, and by exchanging the irradiation member 9, the aspect of the soldering portion 10 and the soldering can be performed. The beam diameter of the laser beam LB can be changed according to the size of the soldering point. For example, if six types of irradiation members 9 having wire diameters of the optical fiber 31 such as 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.6 mm, and 0.8 mm are prepared, the laser light LB can be generated. The beam diameter can be changed to 6 types.

The mode switching button 15 has three first to third switching buttons 15a-15c. Among these, the first switching button 15a is for switching the control mode between an irradiation mode in which the laser light LB can be irradiated and a stop mode in which the laser light LB cannot be irradiated. The second switching button 15b and the third switching button 15c are for increasing and decreasing the output of the laser light LB, emitting and stopping the guide light GB, and changing the display of the display unit 19. belongs to.

Then, when the control mode is switched to the irradiation mode with the first switching button 15a, the irradiation circuit 16 is connected to the power supply circuit 14 by the control circuit 7, so that the operation of the irradiation button 17 becomes effective. At the same time that the laser module 5 can be turned on and off, the irradiation mode lamp 36 provided on the display unit 19 lights up. Further, when the control mode is switched to the stop mode by the first switching button 15a, the irradiation circuit 16 is disconnected from the power supply circuit 14 by the control circuit 7, so that the operation of the irradiation button 17 becomes invalid and the laser is used. At the same time that the module 5 cannot be turned on / off, the irradiation mode lamp 36 goes out.

On the other hand, the irradiation button 17 is configured to close the irradiation circuit 16 only while the irradiation button 17 is pressed, and open the irradiation circuit 16 when the irradiation button 17 is released. Therefore, when the irradiation button 17 is pressed with the control mode switched to the irradiation mode, the laser module 5 is turned on and the laser light LB is emitted only while the irradiation button 17 is pressed, and the irradiation button 17 is emitted. When the pressure is released, the laser module 5 is turned off and the emission of the laser beam LB is stopped, and the indicator lamp 18 is turned on or off in synchronization with the laser module 5.
When the control mode is switched to the stop mode, the irradiation circuit 16 is disconnected from the power supply, so that the laser module 5 is not turned on even if the irradiation button 17 is pressed.

When the laser beam LB is being irradiated, the indicator lamp 18 is turned on, and at the same time, a buzzer is sounded to notify the operator. The buzzer mode is turned on / off by the second switching button 15b or the third switching button 15c.

The switches, buttons, and lamps may be provided at any position on the body 2 as long as they are easy to operate and easy to see, but in the illustrated embodiment, the power switch 13, the display unit 19, and the irradiation button 17 are used. The indicator lamps 18 are arranged on the upper surface of the body 2 in the above order from the rear end side to the front end side of the body 2, and the mode switching button 15 is provided on the side surface of the body 2. In this case, it is desirable that the mode switching buttons 15 are provided on both the left and right side surfaces of the body 2 so that the operator can easily operate whether the operator is right-handed or left-handed.

As can be seen from FIG. 10, the irradiation guide 3 is formed by bending an elastic metal plate, and has a mounting portion 50 for mounting on the tip portion of the body 2 and the mounting portion 50. The arm portion 51 extending from the optical fiber 31 and the frame-shaped aiming portion 52 provided at the tip of the arm portion 51 come into contact with a portion other than the soldering portion around the soldering portion 10. It has a contact portion 53 for making the soldering. In the present embodiment, the aiming portion 52 also serves as the contact portion 53.

The mounting portion 50 has a shape such that a cut 50a in the axial direction is provided on the side surface of the cylinder, and the mounting portion 50 is elastically fitted to the columnar portion of the fiber holder 30. The irradiation guide 3 is detachably attached to the tip of the body 2. Therefore, the irradiation guide 3 can be removed from the body 2 by removing the mounting portion 50 from the fiber holder 30 or removing the fiber holder 30 from the body 2.
However, the irradiation guide 3 can be directly attached to the body 2. In this case, as shown in FIG. 11, a columnar guide attachment portion 4 is formed at the tip of the conical portion 2b of the body 2. The mounting portion 50 may be fitted to the guide mounting portion 4.

Further, the arm portion 51 is formed so as to have an arcuate cross-sectional shape, and extends straight along the axis L.

Further, the aiming portion 52 has a split ring shape having a cut 52b in a part of the circumference, has a pair of left and right frame pieces 52a and 52a having an arc shape, and is a base of the frame pieces 52a and 52a. The tip of the optical fiber 31 is connected to the tip of the arm 51 at the position of the end, and the tip of the optical fiber 31 is directed to the inside of the frame of the aiming portion 52, preferably the center of the ring. At this time, it is desirable that the aiming portion 52 is located in front of the tip of the optical fiber 31. Further, the aiming portion 52 is connected to the arm portion 51 in an inclined state with respect to the arm portion 51 so as to extend obliquely forward of the body 2 on the upper surface side of the body 2. The angle θ formed by the aiming portion 52 and the arm portion 51 is an obtuse angle.

The operation when, for example, reflow type soldering is performed by using the soldering device 1A having the above configuration, is as follows.
That is, first, the power switch 13 is turned on, and the control mode is switched to the irradiation mode by the first switching button 15a of the mode switching button 15.
Subsequently, the body 2 is held so as to hold the pen with one hand, and as shown in FIGS. 12 and 13, the aiming portion 52 that also serves as the contact portion 53 at the tip of the irradiation guide 3 is placed in the frame of the aiming portion 52. The body 2 is slightly tilted by positioning the soldering portion 10 (electrode portion 11a and lead 12a) so as to fit in the soldering portion 10 and pressing the soldering portion 10 in parallel with the peripheral portion (for example, the circuit board 11) of the soldering portion 10. Try to keep it in the same state. Thereby, the irradiation position and the irradiation distance of the laser beam LB are also determined. At this time, it is important to prevent the frame pieces 52a and 52a of the aiming portion 52 from coming into contact with the soldering portion 10 in order to prevent the aiming portion 52 from being soldered.

Next, with the aiming portion 52 pressed around the soldering portion 10, the irradiation button 17 is pressed with a finger to activate the laser module 5, and the laser beam LB is emitted from the tip of the optical fiber 31 to the soldering portion 10. Irradiate toward. Then, the solder 37 applied to the electrode portion 11a is melted by the thermal energy of the laser beam LB, and the electrode portion 11a and the lead 12a are soldered.

At this time, in order to prevent erroneous irradiation of the laser light LB, the laser is operated by operating the second switching button 15b or the third switching button 15c before pressing the aiming portion 52 around the soldering portion 10. The guide light GB is emitted from the module 5, and the guide light GB is irradiated to the irradiation position of the laser light LB in advance to aim at the irradiation position, and in that state, the aiming portion 52 is placed around the soldering portion 10. It is desirable to press it against.

When the soldering of one soldering portion 10 is completed, the irradiation of the laser beam LB is stopped by releasing the pressing by releasing the finger from the irradiation button 17, and in that state, the soldering device 1A is subjected to the next soldering. It is moved to the soldering site 10 and the soldering site 10 is soldered by the same operation. At this time, the guide light GB is still emitted.

On the other hand, soldering can also be performed using linear solder. In that case, for example, the required amount of linear solder is automatically supplied from the solder supply device to the soldering portion 10 while being supplied. The linear solder can be melted with a laser beam LB and soldered, or a solder supply nozzle is held in the hand opposite to the hand holding the soldering device 1A, and the linear solder is supplied from the solder supply nozzle. However, it can also be soldered.

14-18 show a modified example of the irradiation guide. Of these, in the irradiation guide 3A of the first modification shown in FIG. 14, the arm portion 51 has a flat plate shape, the entire arm portion 51 is curved outward with respect to the axis L, and the aiming The portion 52 is formed in a U shape. When this irradiation guide 3A is used, the irradiation distance of the laser beam LB can be adjusted by the elastic deformation of the arm portion 51. However, the arm portion 51 may be a straight line parallel to the axis L.

Further, in the irradiation guide 3B of the second modification shown in FIG. 15, the mounting portion 50 and the arm portion 51 are connected via a connecting portion 54 extending from the mounting portion 50 in a direction intersecting the axis L. Therefore, the distance D between the arm portion 51 and the axis L is kept larger than the radius R of the mounting portion 50. In this case, the arm portion 51 may be a straight line parallel to the axis L or may be curved as in the first modification. This irradiation guide 3B is effective when the soldering portion 10 is relatively large.

Further, in the irradiation guide 3C of the third modification shown in FIGS. 16A and 16B, the arm portion 51 has a flat plate shape, and the arm portion 51 is bent at a plurality of angles with respect to the axis L. There is. That is, the arm portion 51 is composed of a first portion 51a, a second portion 51b, and a third portion 51c, and the first portion 51a maintains an angle α between the mounting portion 50 and the axis L. The second portion 51b extends forward (in the direction of the aiming portion 52) from the first portion 51a while maintaining an angle β larger than the angle α with the axis L, and extends forward from the first portion 51a. Is a portion connecting the second portion 51b and the aiming portion 52, and is slightly curved outward. The third portion 51b forms the contact portion 53. The axial length of the third portion 51c is the longest, the axial length of the first portion 51a is the next longest, and the axial length of the second portion 51b is the shortest.
Since the third portion 51c of the irradiation guide 3C is elastically deformed, the posture of the irradiation guide 3C is more stable than that of the irradiation guide 3A of the first deformation example.

Further, in the irradiation guide 3D of the fourth modification shown in FIG. 17, the aiming portion 52 that also serves as the contact portion 53 has a U shape, and electronic components are attached to the tips of the pair of frame pieces 52a and 52a in the aiming portion 52. A pressing portion 52c bent into an L shape for pressing 12 is formed.
When soldering using the irradiation guide 3, as shown in FIG. 18, by pressing the electronic component 12 with the pressing portion 52c, the misalignment can be prevented, and soldering can be performed in that state. ..

In the embodiment, the aiming portion 52 has a ring shape or a U shape, but the aiming portion 52 may have a Y shape or another shape.

Further, in the irradiation guides 3 and 3A-3D, a frame-shaped aiming portion 52 is formed at the tip of the arm portion 51, and the aiming portion 52 is also used as the contact portion 53. It is also possible to form only the contact portion 53 at the tip of the arm portion 51 without forming the portion 52. In this case, the corresponding contact portion 53 can be formed in the same shape as the tip surface of the arm portion 51, or can be formed in a point shape, a horizontally long or vertically long linear shape, or the like. Further, the frame pieces 52a and 52a of the aiming portion 52 can be formed as a frame-shaped abutting portion having a shape that extends straight toward the front of the arm portion 51. In this case, two The tips of the frame sides 52a and 52a come into contact with the peripheral portion of the soldering portion 10.

Further, as in the irradiation guide 3E of the fifth modification shown in FIG. 19, the contact portion 53 at the tip of the arm portion 51 extends in the direction opposite to the contact portion 53 of the irradiation guides 3 and 3A-3D. It can also be formed to do so. In this case, the angle γ formed by the contact portion 53 and the arm portion 51 is an acute angle. Further, the contact portion 53 may or may not have a frame shape or a plate shape.

The body 2 is configured to be separable into a plurality of parts along the axis L, and by separating them, each part such as the laser module 5, the circuit board 6, or the battery 8 is inspected or replaced. Alternatively, a part or all of the body 2 may be formed so as to be openable and closable along a surface including the axis L or a surface parallel to the axis L. It can also be configured so that the inspection and replacement of the respective parts can be performed by opening the body 2.

Further, as a modification of the first embodiment, since the laser module 5 generates heat during operation, the heat is released to the outside, so that at least a portion of the body 2 surrounding the laser module 5 is formed as shown in FIG. , A plurality of heat dissipation holes 40 can be provided. The heat radiating hole 40 may be a circular hole or an elongated hole elongated in the axis L direction, and such a heat radiating hole 40 may be regularly or irregularly formed in the circumferential direction of the body 2 and the axis L direction. It is desirable to form them side by side.

Further, at the same time as providing the heat dissipation hole 40, the laser module 5 is also made of a metal having excellent thermal conductivity, such as aluminum, as shown in FIG. 21 in order to facilitate heat dissipation to the outside. It is desirable to provide one or a plurality of heat radiating members 41 so as to be exposed on the outer surface of the module case 21. The heat radiating member 41 may be formed so as not to project outward from the outer surface of the module case 21, but as shown in FIG. 22, a plurality of fin-shaped heat radiating members 41 are moduleed inside the body 2. It may be formed so as to project radially from the case 21.

FIG. 23 shows a second embodiment of the laser welding device (soldering device) according to the present invention. The soldering device 1B of the second embodiment is described in that the body 2 has a pistol shape. It is different from the soldering device 1A of the first embodiment.
That is, the body 2 of the soldering device 1B of the second embodiment has a main body portion 2a and a conical portion 2b that are continuous along the axis L, and a grip portion 2c that extends from the main body portion 2a in a direction intersecting the axis L. The laser module 5, the control circuit 7, the circuit board 6, and the battery 8 are housed in the main body 2a and the conical 2b, and the power switch 13 and the indicator lamp 18 are displayed. A portion 19 and a mode switching button 15 are provided, and an irradiation button 17 is provided on the grip portion 2c. However, the battery 8 may be housed inside the grip portion 2c.

The other configurations, modifications, and operations of the soldering apparatus 1B of the second embodiment are substantially the same as those of the soldering apparatus 1A of the first embodiment, and thus the main components of both are the same. Reference numerals used in the first embodiment will be added, and the description thereof will be omitted.

In each of the above embodiments, the irradiation button 17 may be a self-holding type. That is, when the irradiation button 17 is pressed once or switched to the on position, the irradiation button 17 remains on as it is, the laser module 5 is turned on, the laser light LB is emitted, and the irradiation button 17 is pressed. When pressed again or switched to the off position, the irradiation button 17 may be turned off, the laser module 5 may be turned off, and the laser beam LB may be stopped.

Further, in each of the above-described embodiments, the rechargeable battery 8 is provided, but without providing such a battery 8, a power receiving terminal is provided at the rear end of the body 2, and the power receiving terminal is provided with an AC power supply or an AC power supply. It is also possible to configure the power supply line from the DC power supply to be directly connected for use.

Further, the soldering apparatus of each of the above-described embodiments may be provided with a mechanism for injecting an inert gas toward the soldered portion in order to prevent oxidation of the soldered portion during soldering. In this case, a gas flow path is formed inside the body, a gas injection port is formed at the tip of the body, and a port for connecting a tube from the gas supply source is provided at the rear end of the body. It is formed. As the inert gas, nitrogen gas, argon gas or the like is used.

Although the embodiment is a soldering device, it goes without saying that the present invention can also be applied to a welding device for welding synthetic resin parts with a laser beam.

1A, 1B soldering device (laser welding device)
2 Body 3,3A-3E Irradiation guide 5 Laser module 9 Irradiation member 10 Soldering part 20 Light emitting element 30 Fiber holder 31 Optical fiber 50 Mounting part 51 Arm part 52 Aiming part 53 Abutment part θ Angle L Axis line LB Laser light GB Guide light

Claims (10)

A laser module that emits laser light by oscillating a light emitting element with a laser is built into the body that is configured to perform welding work while holding it in one hand, and the laser light emitted from the laser module is welded through an optical fiber. An irradiation member for irradiating the target site and an irradiation guide for preventing erroneous irradiation due to camera shake are provided.
The irradiation guide is formed so as to partially abut the mounting portion for mounting on the body, the arm portion extending from the mounting portion along the optical fiber, and the tip of the arm portion around the welding target portion. Has a contact with the
A manual laser welding device with an irradiation guide. The laser welding device according to claim 1, wherein the irradiation guide is detachable from the body. The irradiation guide has an aiming portion at the tip of the arm portion, the aiming portion has a frame shape, and the laser beam from the irradiation member is directed to the inside of the frame of the aiming portion. The laser welding apparatus according to claim 2. The laser welding device according to claim 3, wherein the aiming portion also serves as the contact portion. The aiming portion extends from the tip of the arm portion toward the diagonally forward side of the body on the upper surface side of the body, and the angle formed by the aiming portion and the arm portion is an obtuse angle. Item 3. The laser welding apparatus according to Item 3. The irradiation member has a fiber holder that also serves as an optical connector, and an optical fiber whose base end is held by the fiber holder and whose tip extends forward from the fiber holder, and is detachably attached to the body. The laser welding apparatus according to any one of claims 1 to 5, wherein the laser welding apparatus is attached. It is an irradiation guide to prevent erroneous irradiation due to camera shake during laser light irradiation by attaching it to a manual laser welding device that performs welding work by irradiating the welding target part with laser light from an optical fiber while holding it in one hand. ,
The irradiation guide includes a mounting portion for mounting on the laser welding device, an arm portion extending from the mounting portion along the optical fiber , and a portion of the tip of the arm portion around the welding target portion. An irradiation guide for a laser welding device, which comprises a contact portion formed so as to abut. It is characterized in that it has an aiming portion at the tip of the arm portion, the aiming portion has a frame shape, and is formed so as to irradiate the welding target portion with a laser beam inside the frame of the aiming portion. The irradiation guide according to claim 7. The irradiation guide according to claim 8, wherein the aiming portion also serves as the contact portion. The irradiation guide according to claim 8 or 9, wherein the aiming portion extends obliquely forward from the tip of the arm portion, and the angle formed by the aiming portion and the arm portion is an obtuse angle.

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