WO2005070605A1

WO2005070605A1 - Solder heating tool and soldering iron bit member used therefor

Info

Publication number: WO2005070605A1
Application number: PCT/JP2004/000690
Authority: WO
Inventors: Hiroyuki Masaki
Original assignee: Hakko Corporation
Priority date: 2004-01-27
Filing date: 2004-01-27
Publication date: 2005-08-04
Also published as: WO2005070606A1; JP4181581B2; JPWO2005070606A1

Abstract

A soldering iron bit member for a solder heating tool characterized by comprising a soldering iron bit (3) of metal for melting a solder by direct contact with the latter, a substantially bar-like ceramic heater (4) provided with a temperature detecting section adjacent the front end and with a heating section disposed on the base end side, the soldering iron bit (3) being internally formed with a recess (3d) in which the ceramic heater (4) is closely inserted, the depth of the recess (3d) being not less than the length from the front end of the ceramic heater (4) to the heating section (4b), the portion where the recess (3d) is formed being provided with a cut (3c) extending from the opening therein to the vicinity of the bottom in such a manner as to divide a section in a plane including the axis of the recess (3d) and normal to the axis; and an electric soldering iron using the same.

Description

Solder heater and iron tip used for it

The present invention relates to a structure of a tip-side portion (a tip-side member) including a tip for a soldering heater represented by a soldering iron. The invention also relates to the structure of a solder heating device using the same. Ming background art book

The structure near the tip of a conventional general solder heating device is, for example, as shown in FIG. FIG. 9 (a) is a partial front view of a conventional electric soldering iron 90 (solder heating device), and FIG. 9 (b) is an exploded perspective view thereof. At the tip of the electric soldering iron 90, a tip 93 stored in a protective pipe 96 is provided. The protection pipe 96 is fixed to the nipple 98 of the casing 91 by a nut 92. A recess 93 d is formed inside the cylindrical body of the tip 93, which is covered by the protective pipe 96. A ceramic heater 94 projecting from the casing 91 is assembled into the recess 93 d so as to fit through an insert pipe 95 made of stainless steel or the like.

The tip 93 is made of copper, a copper alloy, or the like, and its tip is iron-plated to prevent erosion by solder. However, since the erosion by the solder proceeds little by little, the tip 93 is usually a replacement part.

Usually, a large number of tip tips 93 having various tip shapes are prepared, and the operator selects the most suitable tip tip 93 according to the part and range to be soldered and replaces it. Work.

When replacing the tip 93, remove the nut 92 completely from the casing 91. Remove the nut 92 and the protection pipe 96 once from the tip 93, then remove the tip 93 and replace it.

However, in the above-described conventional structure, there is a gap (ceramic gap) between the ceramic heater 94 and the insert pipe 95 and between the insert pipe 95 and the tip 93, so that heat is not generated. The heat transfer speed was insufficient and the heat loss was large. Therefore, the rise time to the set temperature after turning on the power is long, the temperature drop during continuous soldering is large, or the return time from the drop temperature to the set temperature after continuous soldering is long. There were problems such as becoming. The present invention has been made in order to solve such problems of the conventional technology, and by increasing the speed of heat transfer from the ceramic ceramic to the tip and suppressing the heat loss, it is possible to improve the above-mentioned rise. It is a first object of the present invention to provide a soldering tip member capable of reducing the time and temperature recovery time and suppressing the temperature drop during soldering, and a solder heating device using the same.

On the other hand, as a kind of solder heating device, a device that emits an inert gas such as nitrogen from the vicinity of a soldering iron tip is known. This is done in order to prevent the solder from being oxidized by setting the vicinity of the tip to an oxygen-free atmosphere. In the prior art in that case, an inert gas is introduced into the casing 91, and a gas passage is formed from the inside of the casing 91 near the tip of the tip 93 to guide the inert gas. I have. For example, Japanese Patent Application Laid-Open Publication No. 2001-3474769 states that such a soldering iron has a double pipe structure in which a pipe is further provided outside the protective pipe 96, and between the pipes. The structure that allows inert gas to pass through the gap is shown.

A second object of the present invention is to provide a soldering heating device of the type which ejects such an inert gas and which has a simpler structure while achieving the first object. Is to do. Disclosure of the invention The soldering iron tip member for a solder heating device according to the present invention includes a metal tip tip that is brought into direct contact with and melts the solder, and a temperature detecting portion is provided near the tip, and heat is generated on the proximal end side. A ceramic heater having a substantially rod-like shape provided with a concave portion, wherein a concave portion is provided in the inside of the tip where the ceramic heater is adhered in a close contact state, and a depth of the concave portion is the ceramic heater. In the portion forming the recess, the section perpendicular to the axis is divided by a plane including the axis of the recess from the opening to the vicinity of the bottom. It is characterized by a notch that makes a cut.

With this configuration, the speed of heat transfer from the ceramic heater to the tip can be increased and the heat loss can be suppressed by the close contact between the tip and the ceramic heater. Also, when using a soldering heater, the tip and ceramic heater are slightly deformed by heat due to the high temperature. Since the material of the tip is different from that of the ceramic, the coefficient of thermal expansion is also different. If the tip chip and the ceramic heater are fixed in a completely adhered state, the ceramic heater may be damaged by the difference in expansion. However, according to the configuration of the present invention, the radial deformation (expansion) of the tip is absorbed by increasing or decreasing the width of the cut, so that a large compressive or tensile force acts on the ceramic heater. Can be effectively prevented.

In addition, a cylindrical member that covers the base end side of the tip is provided as a structure for achieving close contact between the tip and the ceramic tip while providing the notch, and the tip is provided with: The cylindrical member is press-fitted at a position corresponding to the vicinity of the bottom surface of the concave portion, and a small gap is provided between the outer peripheral surface of the tip and the inner surface of the cylindrical member at other portions. Further, the cylindrical member is provided with a linear reduced diameter portion along the outer peripheral surface at a position corresponding to the vicinity of the base end of the tip. In this case, the outer peripheral surface of the tip and the inner surface of the tubular member may be configured to contact with no gap. By doing so, the tight contact between the tip chip and the ceramic heater is reduced, and the strong contact thereof is minimized to a portion corresponding to the press-fit portion and the reduced-diameter portion. Therefore, even if a difference in thermal expansion occurs, mutual axial displacement is likely to occur, and it is possible to effectively prevent a large compressive or tensile force from acting on the ceramic heater.

The location where the tip is pressed into the cylindrical member is preferably a position corresponding to the temperature detecting portion of the ceramic heater inserted. In this case, the degree of adhesion at the temperature detecting section is particularly increased, and more accurate temperature detection can be performed. Therefore, even if heat is temporarily removed from the tip of the soldering tip by soldering, the temperature can be detected quickly and accurately by the temperature detection unit, and the supplementary heat can be supplemented from the heating unit. Can be transmitted to the tip of the robot at high speed and with low loss. The above-mentioned soldering device in which the soldering tip for a soldering device is detachably attached to the body-side member that supports the soldering device, has a soldering tip having various shapes according to the region and range to be soldered. By preparing the tip side member by hand, it can be appropriately selected and used.

In addition, an inert gas ejection type solder heating device is provided on the main body side member, and a gas introduction section for introducing an inert gas into the main body side member; A gas ejecting portion provided near the distal end for ejecting the introduced inert gas; and a gas passage for guiding the inert gas from the gas introducing portion to the gas ejecting portion. A part of the gas passage is formed by a gap between the outer peripheral surface and the inner surface of the cylindrical member, and the vicinity of the concave bottom surface of the cut is exposed from the cylindrical member to form the gas ejection portion. It is good to do so. In this way, the gap created by the cut can be used as an inert gas passage for the inert gas, so that there is no need to use a double pipe structure as in the conventional structure, and the structure can be simplified. be able to. Brief Description of Drawings

FIG. 1 is a front view of a soldering heater (electric soldering iron) according to a first embodiment, where (a) shows a state in which a tip side member is held by a main body side member, and (b) shows a state where a soldering iron is held. This shows a state in which the front member has been removed from the body member.

FIG. 2 is a partial cross-sectional view of FIG.

FIGS. 3A and 3B are conceptual diagrams showing the configuration of the ceramic heater of the electric soldering iron according to the first embodiment. FIG. 3A shows the circuit configuration of the ceramic heater, and FIG. This shows a state where the ceramic heater is formed by winding. FIG. 4 is a diagram showing a detailed structure around the tip of an electric soldering iron according to the first embodiment,) is a partial sectional view, (b) is a III-III sectional view of (a), (C) is

It is an enlarged view near p part and q part of (a).

FIGS. 5A and 5B are explanatory diagrams comparing the temperature characteristics of the electric soldering iron according to the first embodiment with the temperature characteristics of the conventional electric soldering iron. FIG. 5A shows the temperature characteristics of the first embodiment, and FIG. ) Shows the temperature characteristics of the conventional structure.

FIG. 6 is a front cross-sectional view of the solder heating device (gas ejection type electric soldering iron) according to the second embodiment, showing a state in which an inert gas is guided from the main body side member to the iron tip side member. FIG. 7 is a partially enlarged view of FIG.

FIG. 8 is a front partial cross-sectional view of the vicinity of the soldering tip of the solder heating device (electric soldering iron) according to the third embodiment, where (a) guides the solder suction tube from outside the ceramic heater, b) shows a ceramic heater passed through a solder suction tube. Fig. 9 shows the structure of a conventional solder heating device, where (a) is a partial front view,

(b) is an exploded perspective view thereof. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the solder heating device according to the present invention will be specifically described.

(First Embodiment) FIG. 1 is a front view of an electric soldering iron 10 (solder heating device) according to a first embodiment of the present invention, in which (a) shows a state in which a tip side member 20 is held by a main body side member 25. (B) shows a state where the tip side member 20 is detached from the main body side member 25.

FIG. 2 is a partial cross-sectional view of FIG.

The structure of the electric soldering iron 10 will be described with reference to FIGS. The basic configuration of the electric soldering iron 10 is such that a detachable iron tip member 20 is attached to the tip (left side in FIG. 1) of the main body member 25.

The tip of the tip side member 20 is mainly made of copper (other materials such as copper alloy, silver, or silver alloy may be used) and soldered by direct contact with the solder. A tip 3 is provided. The proximal end of the tip 3 is fitted into a protective pipe 6 (tubular member), and the distal end is exposed from the protective pipe 6 and formed into a shape suitable for soldering.

A concave portion is provided inside the tip 3 and has a cylindrical shape with a bottom. A ceramic heater 4 is attached to the concave portion in a closely contacting state. The ceramic heater 4 is provided with a temperature detecting portion 4a near the distal end and a heat generating portion 4b near the proximal end. These wirings are led out to the outside by lead wires 8 (lead wire 8a for the temperature detecting section and lead wire 8b for the heating section), and are connected to the tip side connector 9. Further, the base end side of the ceramic heater 4 is fitted and held by a substantially cylindrical holder 7 made of metal. As shown in FIGS. 1 (b) and 2, the tip 3, the ceramic heater 4, the protection pipe 6, the holder 7, the lead wire 8, and the tip connector 9 are integrally formed.

The main body-side member 25 mainly includes a casing 1, a fixing nut 2, and an O-ring 12 (positive member) sandwiched therebetween. The casing 1 is a generally tubular member made of a metal or a hard and heat-resistant synthetic resin, and the surrounding area is provided so that an operator can hold the electric soldering iron 10 and handle it. For this purpose, a synthetic resin having heat insulation and elasticity, such as synthetic rubber, is provided as the grip 1a. Casing 1 Inside, a main body side connector 15 to be joined to the iron tip side connector 9 is provided, and an electric cord 1 b is connected. The electric cord 1 b is led out of the casing 1 and connected to a controller (a control device for supplying electric power controlled to maintain the tip temperature to the set value to the ceramic heater 4).

The fixed nut 2 is a nut-like member screwed to the outer periphery of the distal end of the casing 1. The outer peripheral portion is subjected to a mouth-letting process so that the operator can easily rotate it manually. By rotating the fixing nut 2, the fixing nut 2 can freely move in the axial direction within the movable range with respect to the casing 1.

An O-ring 12 is provided so as to be sandwiched between the step portion on the inner diameter side of the fixing nut 2 and the tip end surface of the casing 1. The O-ring 12 is made of an elastic material such as rubber, and is provided at a position where the holder 7 is inserted when the tip side member 20 is attached.

On the rear end side of the fixed nut 2 from the female screw forming portion, a flathead screw 5 for preventing the fixed nut 2 from completely detaching from the casing 1 is provided.

FIG. 3 is a conceptual diagram showing the configuration of the ceramic heater 4. (a) shows the circuit configuration of the ceramic heater 4; and (b) shows a ceramic green sheet 4c wound around a ceramic rod 4d. This shows the state where overnight 4 is formed. The structure of the ceramic capacitor 4 will be described with reference to FIG.

The ceramic heater 4 is composed of a ceramic green sheet 4 formed by a pattern of a temperature-sensitive resistor such as tungsten provided in the temperature detecting section 4a and a pattern of a heating resistor such as tungsten provided in the heating section 4b. The product printed at the same time as c is wound around a cylindrical ceramic rod 4d such as alumina / silicon nitride as the base and sintered and integrated. A lead wire 8a for the temperature detecting portion is led out from the temperature detecting portion 4a, and a lead wire 8b for the heat generating portion is led out from the heat generating portion 4b, and connected to the tip side connector 9.

4A and 4B are views showing a detailed structure around the tip 3. FIG. 4A is a partial cross-sectional view, and FIG. 4B is a cross-sectional view taken along the line III-III of FIG. Of 4 (Circuit structure is omitted.) (C) is an enlarged view of the vicinity of the P part and the Q part of (a). The detailed structure around the tip 3 will be described with reference to FIG.

A recess 3 d is provided inside the tip 3 and has a bottomed cylindrical shape, and the tip side of the ceramic heater 4 is adhered in a tight contact state. The depth of the recess 3d is equal to or greater than the length from the tip of the ceramic window 4 to the heating portion 4b. In other words, the temperature detecting section 4 a and the heat generating section 4 b of the ceramic heater 4 are in a state of being covered with the tip 3 around. The outer diameter of the bottom side (tip side) of the bottomed cylindrical portion of the tip 3 is relatively large (large diameter portion 3a). The range of the large-diameter portion 3a is a portion substantially equivalent to the temperature detecting portion 4a when the ceramic heater 4 is attached, and when the ceramic heater 4 is fitted to the protective pipe 6 when the ceramic heater 4 is attached. This is a portion corresponding to the tip portion. The bottomed cylindrical portion closer to the base end than the large diameter portion 3a is a small diameter portion 3b slightly smaller in diameter than the large diameter portion 3a.

The portion forming the concave portion 3d (mainly the large-diameter portion 3a and the small-diameter portion 3b) includes, from the opening to the vicinity of the bottom surface, a plane including the axis of the concave portion 3d (see FIG. 4A). A notch 3c is provided that divides a cross section perpendicular to the axis (a cross section shown in Fig. 4 (b)) at a plane passing through the axis of the recess 3d and perpendicular to the paper plane. The notch 3c is deeper than the large-diameter portion 3a, and when inserted into the protective pipe 6, its distal end is exposed to form a notch exposed portion 3e.

Due to the notch 3c, the large-diameter portion 3a and the small-diameter portion 3b of the tip 3 are easily spread on both sides of the notch 3c. Therefore, when the ceramic heater 4 is attached and there is nothing to restrict the outer circumference (in a state where it is not yet inserted into the protective pipe 6), the outer peripheral surface of the ceramic heater 4 and the large-diameter portion 3a and the small-diameter Although it is in close contact with the inner peripheral surface of part 3b, its adhesion is weak and there is a slight air gap.

The inner diameter of the protection pipe 6 when it is free is slightly smaller than the large diameter portion 3a and slightly larger than the small diameter portion 3b. Therefore, when the tip 3 is fitted into the protective pipe 6, the large diameter portion 3a is press-fitted, and a small gap is formed between the small-diameter portion 3b and the protective pipe 6. The position corresponding to the vicinity of the base end of the tip 3 of the protection pipe 6 (see FIG. 4 (a) and

In (q) of (c)), a linear reduced diameter portion 6a is provided along the outer peripheral surface. In the reduced diameter portion 6a, the outer peripheral surface of the small diameter portion 3b and the inner surface of the protection pipe 6 abut without any gap. Therefore, when the tip 3 is inserted into the protective pipe 6, the large-diameter portion 3a and the portion of the small-diameter portion 3b that abuts on the reduced-diameter portion 6a extend around the outer periphery of the tip 3. Regulate strongly. For this reason, the degree of adhesion between the ceramic capacitor 4 and the tip 3 is also strong at locations corresponding to these (the first strong contact h and the second strong contact j). As described above, since the ceramic heater 4 is strongly adhered to almost both ends of the portion to be inserted into the tip 3, the overall adhesion is also high.

Next, the operation of the electric soldering iron 10 having the above structure will be described. First, when performing soldering, the operator selects a tip-side member 20 having a tip shape that is optimal for the work, and inserts it into the body-side member 25. At this time, loosen the fixing nut 2 and insert the holder 7 into the tip of the casing 1.

After the holder 7 is inserted, the fixing nut 2 is tightened to deform the O-ring 12, and the holder 7 is fixed by pressing the holder 7 from the periphery. After attaching the tip side member 20 to the main body side member 25 in this way, the operator turns on the power of a controller (not shown) and sets the required tip temperature. Electric power corresponding to the set temperature is supplied from the controller to the heating section 4b of the ceramic heater 4, and the heating section 4b generates heat.

The heat generated in the heat-generating portion 4b is transmitted to the tip 3, but the ceramic heater 4 and the large-diameter portion 3a and the small-diameter portion 3b of the tip 3 are in good contact with each other. Its heat conduction is performed at high speed and with low loss.

The temperature of the tip of the tip 3 is detected by the temperature detection section 4a of the ceramic heater 4 and transmitted to a controller (not shown). Since the vicinity of the temperature detecting section 4a is the first strong contact point h, the degree of adhesion is particularly high, and more accurate temperature detection is possible. Therefore, heat is temporarily removed from the tip of the tip 3 by soldering. In this case, the temperature can be quickly and accurately detected by the temperature detection section 4a, and the supplementary heat can be transmitted from the heating section 4b to the tip of the tip 3 with high speed and low loss. it can.

Fig. 5 is an explanatory diagram comparing the temperature characteristics of the electric soldering iron 10 with the temperature characteristics of the conventional structure of the electric soldering iron 90 (see Fig. 9). (B) shows the temperature characteristics of an electric soldering iron 90 having a conventional structure. In each case, the horizontal axis shows time (s) and the vertical axis shows tip temperature CC).

The set temperatures were both 350 ° C and the same controller was used. With these temperature characteristics, an operation equivalent to continuous soldering (hereinafter referred to as continuous soldering) is performed in sections where the temperature rises and falls sharply. Continuous soldering was performed with the tip of the solder abutted at intervals of 3 seconds on the lead-filled solder on the copper phenolic board with a 10 mm square cut surface.

Referring to Fig. 5 (b), in the conventional structure, the rise time t11 at which the tip temperature rises from the power-on to the set temperature was t11 = 71s. In the continuous soldering section, the temperature drop Td 11 (which occurs due to the delay of each temperature return) was Td 11 = 45 ° C. Then, after continuous soldering, the recovery time t12 before returning to the set temperature again was t12 = 23 s.

On the other hand, according to the electric soldering iron 10 of this embodiment, referring to FIG. 5A, the rise time t 1 = 24 s (about 1 Z 3 of t 11) and the temperature drop T d 1 = 5 (1/9 of Tdll) and recovery time t2 = s (about 1/6 of t12). In other words, the rise time and return time of the temperature are greatly reduced, and the temperature drop is drastically reduced. This is because, as a result of using the tip member 20 of the present embodiment, heat was transferred from the heating portion 4b to the tip of the tip 3 with high speed and low loss, and the temperature of the temperature detection portion 4a was high. This is a remarkable effect due to the improvement in detection accuracy.

When the electric soldering iron 10 is used, the tip 3 and the ceramic heater 4 are slightly deformed by heat due to high temperature. Tip 3 and ceramic chip

0 Since the material is different from that of Evening 4, the coefficient of thermal expansion is also different. If the tip 3 and the ceramic heater 4 are fixed in a tightly adhered state, the expansion difference may damage the ceramic heater 4, but in the structure of the present embodiment, the damage is caused by the damage. Is effectively prevented. That is, the deformation (expansion) of the tip 3 in the radial direction is absorbed by the increase or decrease in the width of the notch 3 c, thereby preventing a large compressive or tensile force from acting on the ceramic heater 4. ing. As for the deformation in the axial direction, the strong contacts are minimized to the first strong contact h and the second strong contact j. Compression and tension are not applied.

When it becomes necessary to replace the tip 3, the power is turned off, the fixing nut 2 is loosened, the tip member 20 is pulled out, and a new tip member 20 is inserted and replaced.

(Second embodiment)

Next, a second embodiment of the present invention will be described. FIG. 6 is a front sectional view of the soldering device (gas ejection type electric soldering iron 50) according to the second embodiment, in which the tip side member 58 is attached to the main body side member 59. It shows the state that was done. In the following embodiments, the same portions as those of the first embodiment are denoted by the same reference numerals, and the description thereof will not be repeated. At the base end of the casing 51, there is provided a gas introduction part 52 for introducing an inert gas (nitrogen or the like) into the inside of the casing 51 (body part 59). A connection terminal 55 is connected to the gas introduction section 52, and is connected to an inert gas supply device (not shown) via a gas introduction pipe 57.

On the other hand, a gas rectifying cap 53 is attached near the tip of the protection pipe 6. The gas rectifying cap 53 is a substantially cylindrical rectifying plate surrounding the notch exposed portion 3 e (see FIG. 4 (a)) with a gap provided between the notch exposed portion 3 e (see FIG. 4 (a)). The active gas is configured to be guided toward the tip of the tip 3. Other configurations are the same as those of the first embodiment.

FIG. 7 is an enlarged view near the tip 3 shown in FIG. However, for explanation The tip 3 is shown rotated 90 ° around the axis. With reference to FIG. 6 and FIG. 7, the operation mainly related to the inert gas will be described. The inert gas introduced into the casing 51 from the gas introduction section 52 passes through the internal gap of the casing 51 as shown by the arrow in FIG. It is guided inside the member 58. At this time, the airtightness of the connection between the tip side member 58 and the main body side member 59 is maintained by the O-ring 12.

The inert gas introduced into the inside of the tip side member 58 reaches the tip 3 through a gap between the ceramic heater 4 and the protection pipe 6. Then, the gas is ejected from the cut-out exposed portion 3e through the cut 3c (see FIGS. 7 and 4 (b)) of the tip 3. The spouted inert gas is guided by the gas rectifying cap 53 to the vicinity of the tip of the tip 3 to make the vicinity of the tip an oxygen-free atmosphere. Therefore, oxidation of the solder during soldering is prevented, and good soldering can be performed.

As described above, since the inert gas is guided to the tip using the notch 3 c, the conventional structure (a double structure in which a pipe is further provided outside the protection pipe 6 and the space between the pipes is adopted) (A structure in which an inert gas is passed through the gap). The connection between the protection pipe 6 and the gas rectifying cap 53 may be made detachable by screws or the like. When there is no need to blow out inert gas, removing the gas rectifying cap 53 improves the visibility of the soldering tip during soldering.

(Third embodiment)

Next, a third embodiment of the present invention will be described. FIG. 8 is a front partial sectional view of a soldering device (electric solder desoldering iron 60, 70) according to the third embodiment. The electric solder desoldering irons 60 and 70 melt and suck and remove the solder, and are equipped with solder suction tubes 61 and 71.

FIG. 8 (a) shows that the solder suction tube 61 is guided from the outside of the ceramic heater 4. As the structure of the tip side member 68, a cylindrical suction nozzle 62 is screwed to the tip of the tip tip 63 provided at the tip of the protective pipe 66 (the tip tip 6). Three

2 And may be integrally molded). A solder suction tube 61 is provided so as to penetrate the tip tip 63 and communicate with the inner diameter side of the suction nozzle 62. The other end of the solder suction tube 61 is connected to a vacuum suction device (not shown).

With such a configuration, the heat generated by the ceramic heater 4 is transmitted to the tip of the suction nozzle 62 via the tip 63 and melts the solder in contact therewith. The molten solder is sucked and removed from the suction port 65 by vacuum suction.

FIG. 8 (b) shows the ceramic heater 4 with the solder suction pipe 71 passed through. As a structure of the tip side member 78, a through hole 72 penetrating the axis thereof is provided in the tip tip 73 provided at the tip of the protection pipe 76. A solder suction pipe 71 communicating with the through hole 72 passes through the inside of the ceramic heater 4 and is connected to a vacuum suction I device (not shown).

With this configuration, the heat generated in the ceramic heater 4 is transmitted to the tip of the tip 73 and melts the solder in contact with the tip. The molten solder is sucked and removed from the suction port 75 by vacuum suction.

Also in these soldering heaters, the structures of the tip side member 68 and the tip side member 78 are the same as those of the first embodiment, so that the rise time and the return time can be shortened and the temperature drop can be suppressed. The effect of can be obtained.

Although the first to third embodiments have been described above, the present invention is not limited to these, and may be appropriately modified within the scope of the claims. For example, the method of connecting the tip side member and the main body side member does not need to have the structure using the O-ring as described above, and may be appropriately designed and changed. Industrial applicability

As described above, the soldering tip side member for a solder heating device according to the present invention has a metal tip tip that is brought into direct contact with the solder and melts, and a temperature detecting portion is provided near the tip, and furthermore, It has a substantially bar-shaped ceramic heater with a heat-generating part on the base end side. A recess in which the ceramic heater is attached in close contact with the tip of the tip is formed, and the depth of the recess is equal to or greater than the length from the tip of the ceramic heater to the heating section. A cut is formed in the portion forming the recess from the opening to the vicinity of the bottom so as to divide a cross section perpendicular to the axis with a plane including the axis of the recess. As a result, the temperature drop during soldering can be suppressed in a soldering heater using it, and the rise time to the set temperature after turning on the power and the return from the fall temperature to the set temperature after continuous soldering It is possible to shorten the return time before the operation. In addition, the structure can be made simpler, especially when used in a solder heating device of a type that ejects an inert gas.

Four

Claims

The scope of the claims

1. A metal tip that directly contacts and melts the solder,

A temperature detecting section is provided near the distal end, and a substantially bar-shaped ceramic heater having a heating section provided on the proximal end side is provided.

A concave portion into which the ceramic heater is inserted in close contact with the inside of the tip is provided,

The depth of the concave portion is equal to or greater than the length from the tip of the ceramic heater to the heat generating portion,

A cut is formed in the portion forming the recess from the opening to the vicinity of the bottom so as to divide a cross section perpendicular to the axis with a plane including the axis of the recess. Tip side member for appliance.

2. A cylindrical member for covering the base end of the tip is provided.

The tip is press-fitted into the cylindrical member at a position corresponding to the vicinity of the bottom surface of the recess. In other portions, the tip is located between the outer peripheral surface of the tip and the inner surface of the cylindrical member. 2. The tip member for a solder heating device according to claim 1, wherein a slight gap is provided.

3. The point where the tip of the tip is press-fitted into the cylindrical member is configured to be a position corresponding to the temperature detecting portion of the attached ceramic heater. Item 2. A soldering tip member for a solder heating device according to item 2.

4. The cylindrical member is provided with a linear reduced diameter portion along the outer peripheral surface at a position corresponding to the vicinity of the base end of the tip.

4. The solder roll according to claim 2, wherein the reduced diameter portion is configured such that an outer peripheral surface of the tip tip and an inner surface of the cylindrical member abut without any gap. Tip member for heating appliances.

5. The soldering iron tip member according to any one of claims 1 to 4, A solder heating device, which is detachably provided on a main body side member for supporting the solder heating device.

6. A gas introduction unit provided on the main body side member for introducing an inert gas into the main body side member;

A gas jetting portion provided near the tip of the tip and jetting out the introduced inert gas;

A gas passage for guiding an inert gas from the gas introduction portion to the gas ejection portion; and a gap between the outer peripheral surface of the ceramic heater and the inner surface of the cylindrical member at the cut portion. Part is formed,

6. The solder heating device according to claim 5, wherein a portion of the cut near the bottom surface of the concave portion is exposed from the cylindrical member to form the gas ejection portion.