WO2005070604A1

WO2005070604A1 - Solder heating device

Info

Publication number: WO2005070604A1
Application number: PCT/JP2004/000675
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: JP4134174B2; CN100363138C; JPWO2005070604A1; CN1697717A

Abstract

A solder heating device, comprising an iron head member (20) in which an iron head tip (3) directly touching solder to fuse the solder is integrally fitted to the tip of a cylindrical member (6), a body side member (25) to which the base end side of the iron head member (20) is fitted and supporting the iron head member (20) through an elastic member (12), and a pressing means (2) formed so as to increase the pressing force of the elastic member (12) to press the base end side of the iron head member (20) by pressingly deforming the elastic member (12), wherein the pressing means (2) is formed switchable between a holding state in which the iron head member (20) is strongly supported with a large pressing force to fix the iron head member to the body side member and a releasing state in which the iron head member (20) is weakly supported with a small pressing force to detachably fit the iron head member to the body side member (25).

Description

Description Solder heating equipment Technical field

The present invention relates to a soldering heating device represented by a soldering iron, and more particularly to a soldering glow heating device capable of exchanging a tip-side portion (a tipping-side member) including a tip of a soldering iron. Regarding the structure. Background art

The structure near the tip of a conventional general solder heating device is, for example, as shown in FIG. FIG. 10 (a) is a partial front view of a conventional electric soldering iron 90 (solder heating device), and FIG. 10 (b) is an exploded perspective view thereof. At the front end 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 protruding from the casing 91 is fitted into the recess 93 d via 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 咅 β is provided with an iron plating for preventing 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, the conventional structure as described above has a problem that it takes time to replace the tip 93. Depending on the content of the work, the tip tip 93 may be frequently replaced. In such a case, frequent replacement work as described above while paying attention to the high temperature has reduced the work efficiency.

It is also known that the structure is such that the protective pipe and the nut are integrated (for example, see Japanese Patent Application Laid-Open No. 11-56054), making the replacement work easier to some extent. After completely removing the integrated pipe and nut from the casing, the tip must be replaced, leaving room for further improvement.

The present invention has been made to solve such problems of the prior art, and has a solder heating device that can easily replace a tip and improve work efficiency. The primary purpose is to provide.

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 this case, the prior art introduces an inert gas into the casing 91 and forms a gas passage near the tip of the tip 93 from inside the casing 91 to guide the inert gas. Therefore, between the casing 91 and the detachable member on the distal end side thereof, some kind of airtight maintenance mechanism different from the detachment mechanism was provided. For example, Japanese Patent Laid-Open Publication No. 2001-3477369 discloses a mechanism for maintaining airtightness by using rubber packing.

A second object of the present invention is to provide a solder heating device of the type which ejects such an inert gas, wherein the solder heating device can achieve airtight maintenance more easily while achieving the first object. is there. Disclosure of the invention A solder heating device according to the present invention includes: a tip member having an integrated tip tip for directly contacting and melting the solder; and a base end side of the tip member. The elastic member presses and deforms the main body side member that is attached and supports the tip side member via the elastic member, and the elastic member moves the base end side of the tip side member. A pressing unit configured to increase a pressing force to be pressed, wherein the pressing unit changes the pressing force so that at least the pressing force is in a holding state and a small releasing state. In the holding state, the tip member is strongly supported by a large pressing force and fixed to the main body member, and in the released state, the tip member is reduced by a small pressing force. Weakly support Characterized in that it is configured to enable 揷脱 the body side member.

With this configuration, it is possible to switch between the holding state and the releasing state only by changing the pressing force on the elastic member. Therefore, when exchanging the tip, it is only necessary to switch to the released state and replace the tip side member integrally provided with the tip, and it is necessary to completely remove the nut from the casing. No tip can be easily and quickly replaced.

The pressing means is a nut-shaped member screwed to the body-side member, and adjusts the pressing force on the elastic member by rotating the nut-shaped member and moving the nut-shaped member in the axial direction. It is preferable to switch between the open state and the open state.

With this configuration, the magnitude of the pressing force can be adjusted by adjusting the tightening of the nut-shaped member. At first glance, the structure using a nut is similar to the conventional technology, but in the past it was necessary to completely remove the nut to replace the tip (from the held state to the released state). On the other hand, in the structure of the present invention, it is only necessary to appropriately loosen (or tighten) the nut-shaped member. For example, if it is set to switch between the holding state and the released state by changing the deformation amount of the elastic member by l mm, it is possible to switch by only rotating the nut-shaped member with a pitch of l mm once. Work efficiency is remarkably improved. Further, the nut-shaped member is provided with a projection protruding toward the inner diameter side, A regulating groove into which the protrusion is fitted is formed in the body-side member, and when the nut-shaped member is moved in a direction to separate from the body-side member, the protrusion comes into contact with a groove wall of the regulating groove at a predetermined position. Therefore, it is preferable that the movement in the departure direction is restricted.

In this case, since the nut-shaped member does not come off from the main body side member, the nut-shaped member is detached against the operator's will, and unnecessary work of reattachment can be reliably prevented.

It is preferable to use an O-ring made of an elastic material for the elastic member because a low-cost and simple structure can be obtained. However, in addition to the o-ring, an elastic member of any shape using rubber or resin, or a mechanism using a spring or the like may be used.

In addition, as an inert gas ejection type solder heating device, a gas introduction unit provided on the main body side member for introducing an inert gas into the inside of the main body side member, and provided near the tip of the tip of the tip. A gas ejecting portion for ejecting the introduced inert gas; and a gas for guiding the inert gas from the gas introducing portion to the gas ejecting portion via the inside of the main body side member and the inside of the tip side member. Preferably, a gas passage is provided, and the gas-tightness of the gas passage at a connection portion between the body-side member and the tip-side member is maintained by the elastic member.

In this case, the airtightness of the connection portion is maintained by the elastic member (o-ring or the like). In other words, the elastic member can serve both as a function of holding the tip side member and a function of maintaining the gas tightness of the inert gas, so that the structure can be simpler than the conventional structure having separate mechanisms. . 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 soldering iron. 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.

FIG. 3 is a partially enlarged view of FIG.

FIGS. 4A and 4B are conceptual diagrams showing the configuration of the ceramic heater of the electric soldering iron according to the first embodiment, wherein FIG. 4A shows the circuit configuration of the ceramic heater and FIG. Shows a state in which a ceramic layer is formed by wrapping around. FIGS. 5A and 5B are diagrams showing a detailed structure around the tip of the electric soldering iron according to the first embodiment, wherein FIG. 5A is a partial cross-sectional view, and FIG. Figure (c)

It is an enlarged view of the vicinity of the p part and ci part of (a).

FIG. 6 is a front cross-sectional view of the soldering device (electric soldering iron) according to the second embodiment, showing a state in which the tip side member is removed from the main body side member.

FIG. 7 is a front cross-sectional view of the soldering device (gas ejection type electric soldering iron) according to the third embodiment, and shows a state in which an inert gas is guided from the main body side member to the iron tip side member. FIG. 8 is a partially enlarged view of FIG.

FIG. 9 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 fourth 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. 10 shows the structure of a conventional soldering heater, and (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 member 20 is held by a body 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 an insertable / removable 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 inserted into a protective pipe 6 (cylindrical 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 inserted into the recess in a tightly contacted state. The ceramic heater 4 is provided with a temperature detecting portion 4a near the distal end and a heat generating portion 4 on the base end side. 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 (a flexible member) sandwiched therebetween. The casing 1 is a generally tubular member made of a metal or a hard and heat-resistant synthetic resin, around which an operator can hold an electric soldering iron 10 for handling. For this purpose, a synthetic resin having heat insulation and elasticity, such as synthetic rubber, is provided as the grip portion 1a. Inside the casing 1, a main body side connector 15 to be joined to the iron tip side connector 9 is provided, and an electric cord 1b 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. A knurling process is applied to the outer peripheral portion so that the operator can easily rotate the outer periphery 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 a step portion on the inner diameter side of the fixed nut 2 and a 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 fitted with the tip side member 20 attached.

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

FIG. 3 is a partially enlarged view of FIG. The detailed structure around the O-ring 12 will be described with reference to FIG. A male screw 1 c is formed on the outer peripheral surface of the tip of the casing 1, and a female screw 2 b is formed on the inner peripheral surface of the fixed nut 2 so as to be screwed into the male screw 1 c. Therefore, when the fixing nut 2 is tightened, the fixing nut 2 moves to the right (in the direction of the arrow in FIG. 3), and when it is loosened, moves to the opposite side. A small-diameter portion 2a having a smaller diameter than the female screw 2b of the fixed nut 2 is provided on the distal end side, and a step surface 2g is formed. The O-ring 12 is sandwiched between the stepped surface 2 g and the distal end surface 1 g of the casing 1. A projecting portion 1 f is formed at the tip of the casing 1 on the outer diameter side of the O-ring 12, and restricts the O-ring 12 from spreading outward.

The outer peripheral surface 7f of the holder 7 is fitted into the inner diameter side of the O-ring 12 so that the outer peripheral surface 7f of the holder 7 is in contact with the tip side member 20 in the attached state. A small step 7 a having a slightly larger diameter is formed on the outer peripheral surface 7 の of the holder 7 on the base end side with respect to the portion in contact with the O-ring 12. The base end side of the small step 7a is formed into a slightly tapered taper shape. When the O-ring 12 is free (the state shown in FIG. 3), the inner diameter is set to be substantially equal to or slightly smaller than the outer diameter of the outer peripheral surface 7 f of the holder 7.

A countersunk screw 5 is screwed from the outer peripheral side toward the inner side of the fixed nut 2 at a position closer to the base end than the female screw 2b. Two countersunk screws 5 are provided at axially symmetric positions. You can do it) The tip of the countersunk screw 5 projects from the inner peripheral surface of the fixing nut 2 to form a projection 5a. On the other hand, on the outer peripheral surface of the casing 1, a regulating groove 1e into which the projection 5a is fitted is formed. When the fixing nut 2 is further loosened from the state shown in Fig. 3, the fixing nut 2 moves to the side opposite to the arrow shown in Fig. 3, and the projection 5a comes into contact with the groove wall 1d of the restriction groove 1e. I have.

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

The ceramic heater 4 is composed of a ceramic green sheet 4 composed of 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 on 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.

FIGS. 5A and 5B are diagrams showing a detailed structure around the tip 3. FIG. 5A is a partial sectional view, and FIG. 5B is a sectional view taken along the line III-III of FIG. (The internal structure of Fig. 4 is omitted.) (C) is an enlarged view of the vicinity of the p and q parts of (a). The detailed structure around the tip 3 will be described with reference to FIG.

As described above, the inside of the tip 3 is provided with the concave portion 3 d so as to have a cylindrical shape with a bottom, and the tip side of the ceramic heater 4 is adhered in a close contact state. The depth of the recess 3 d is equal to or greater than the length from the tip of the ceramic heater 4 to the heat generating portion 4 b. In other words, the temperature detecting portion 4a and the heat generating portion 4b of the ceramic heater 4 are in a state of being covered with the tip 3 around the periphery. The outer diameter on the bottom side (tip side) of the bottomed cylindrical portion of the tip 3 is relatively large (large diameter portion 3a). Large diameter part 3a range is This is a portion substantially equivalent to the temperature detecting portion 4a when the Mickey night 4 is attached, and a portion corresponding to the tip portion of the protective pipe 6 when fitted to the protective pipe 6. 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 a plane including the axis of the concave portion 3d from the opening to the vicinity of the bottom (see FIG. 5A). A notch 3c is provided that divides a cross section (the cross section shown in Fig. 5 (b)) perpendicular to the axis at a plane passing through the axis of the recess 3d and perpendicular to the paper. 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 no restriction on its outer periphery (when 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 Although it is in close contact with the inner peripheral surface of the small-diameter portion 3b, its adhesion is weak, and a slight air gap exists.

The free inner diameter of the protection pipe 6 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 protection pipe 6, the large diameter portion 3a is press-fitted, and the small diameter portion 3b has a slight gap with the protection pipe 6. A position corresponding to the vicinity of the base end of the tip 3 of the protective pipe 6 (see FIG. 5 (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 heater 4 and the tip 3 is also strong at locations corresponding to these (the first strong contact h and the second strong contact j). Thus, the ceramics Since the Kuhi overnight 4 is strongly adhered at almost both ends of the portion where it is attached to 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, at the time of soldering, the operator selects a tip-side member 20 having an optimum tip shape for the work, and attaches it to the body-side member 25. At that time, loosen the fixing nut 2 to make the O-ring 12 free (released as shown in Fig. 3), and insert the holder 7 into the tip of the casing 1. Since the base end side of the holder 7 is tapered, the O-ring 12 can be easily passed through the O-ring 12 with a small force without damaging the O-ring 12.

After inserting the holder 7 to the insertion position shown in FIG. 3, the fixing nut 2 is then tightened and moved in the direction of the arrow in the figure. Then, the distance between the tip surface 1 g of the casing 1 and the step surface 2 g of the fixing nut 2 becomes narrow, and the sandwiched O-ring 12 is deformed. Since the outer diameter side of the O-ring 12 is regulated by the overhang portion If, and the inner diameter side is regulated by the outer peripheral surface 7 of the holder 7, the O-ring 12 ultimately occupies the space surrounded by these surfaces. Deform to fill. Due to this deformation, a strong pressing force acts on the outer peripheral surface 7 f of the holder 7 from the O-ring 12, and the holder 7 is strongly supported by the frictional force and is fixed to the casing 1 (holding state). Also, the minute step 7a provided on the holder 7 catches on the deformed O-ring 12 and acts as a stopper.

After attaching the tip side member 20 to the main body side member 25, 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.However, the ceramic portion 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 detector 4a of the ceramic heater 4 and transmitted to a controller (not shown). Since the vicinity of the temperature detection section 4a is the first strong contact h, the degree of adhesion is particularly high, and more accurate temperature detection is possible.

0 I'm wearing Therefore, even if heat is temporarily removed from the tip of the soldering tip 3 by soldering, it can be detected quickly and accurately by the temperature detecting section 4a, and the heat to compensate for it is generated by the heating section 4b. High-speed and low-loss transmission to the tip of the tip 3 is possible.

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. Since the tip 3 and the ceramic heater 4 are made of different materials, they have different coefficients of thermal expansion. If the tip 3 and the ceramic heater 4 are fixed in a completely adhered state, the ceramic heater 4 may be damaged by the expansion difference. Prevention. That is, the radial deformation (expansion) of the tip 3 is absorbed by increasing or decreasing the width of the notch 3c, thereby preventing a large compressive or tensile force from acting on the ceramic heater 4. I have. As for the deformation in the axial direction, the strong contacts are minimized to the first strong contact point h and the second strong contact j. Compression and tension are not applied.

If it becomes necessary to replace the tip 3, turn off the power and loosen the fixing nut 2 to release the deformation of the O-ring 12. In this released state, the tip member 20 is pulled out, and a new tip member 20 is inserted and replaced. In order to release the nut, it is not necessary to remove the fixed nut 2 from the casing 1; it is sufficient to loosen the nut 2 to the extent that the O-ring 12 is free. For example, assuming that the axial deformation of the O-ring 12 in the holding state is l mm and the pitch of the female thread 2b is l mm, the fixing nut 2 can be released only by loosening one turn. Therefore, the tip member 20 can be easily and quickly replaced, and the working efficiency can be remarkably improved. If the fixing nut 2 is loosened more than necessary, the protrusion 5 a at the tip of the flat head screw 5 will contact the groove wall I d of the regulating groove 1 e provided in the casing 1, and the fixing nut 2 Is restricted from moving in the disengaging direction (the direction opposite to the arrow in Fig. 3). Therefore,

1 Unnecessary work of detaching the fixing nut 2 and reattaching it, contrary to the operator's will, can be reliably prevented. When it is necessary to remove the fixed nut 2 such as when replacing the 0 ring 12, the flat nut 5 can be easily removed by loosening the flat head screw 5 and lowering the protrusion 5 a sufficiently.

(Second embodiment)

Next, a second embodiment of the present invention will be described. FIG. 6 is a front sectional view of the soldering device (electric soldering iron 30) according to the second embodiment, showing a state where the tip side member 40 has been removed from the body side member 45. In the following embodiments, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will not be repeated.

The electric soldering iron 30 differs from the first embodiment in that the ceramic heater 4 is fixed to the body side member 45 instead of the iron tip side member 40. Therefore, the connector 49 directly connects the lead wire 8 and the electric cord 1b. The tip 43 and the protection pipe 46 do not have the structure as shown in FIG. 5, but are simply joined or press-fitted. No equivalent to the notch 3c in the first embodiment is provided. When the ceramic heater 4 is inserted, a certain gap (air gap) is provided so that the ceramic heater 4 is not damaged by thermal deformation when the ceramic heater 4 is inserted. The diameter is set so that it will occur. In addition, an insert pipe 95 as shown in FIG. 10 (b) may be provided between the concave portion 43d and the ceramic roof 4.

Since other structures are the same as those of the first embodiment, the same effect of improving workability as in the first embodiment can be obtained when the tip side member 40 is replaced.

The electric soldering iron 30 has a lower temperature followability than the first embodiment due to the air gap between the recess 43 d and the ceramic heater 4, but if it can be tolerated, The number of replacement parts can be reduced (iron tip 4 is not included in the tip side member 40), and costs can be reduced.

(Third embodiment) Next, a third embodiment of the present invention will be described. FIG. 7 is a front sectional view of a soldering device (gas ejection type electric soldering iron 50) according to the third embodiment, in which a tip side member 58 is inserted into a main body side member 59. It shows the state that was done.

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 that surrounds the notch exposed portion 3 e (see FIG. 5A) with a gap provided between the notch exposed portion 3 e (see FIG. 5A). 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. 8 is an enlarged view of the vicinity of the tip 3 shown in FIG. However, for the sake of explanation, the tip 3 is shown rotated 90 ° around the axis. With reference to FIGS. 7 and 138, 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 an arrow in FIG. It is guided inside the tip side 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 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 capacitor 4 and the protection pipe 6. Then, the gas flows through the notch 3c (see FIGS. 8 and 5 (b)) of the tip 3 and is ejected from the notch exposed portion 3e. 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, the O-ring 12 has the function of holding the tip member and the hermeticity of the inert gas.

Three Since the holding function is also used, the structure can be simplified as compared with the conventional structure having separate mechanisms. In addition, since the inert gas is guided to the tip by 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 gap between the pipes is used) The structure can be simpler than that of passing an inert gas. The connection between the protection pipe 6 and the gas rectification cap 53 may be made detachable by screws or the like. When it is not necessary to blow out an inert gas, removing the gas rectifying cap 53 improves the visibility of the soldering tip during soldering.

(Fourth embodiment)

Next, a fourth embodiment of the present invention will be described. FIG. 9 is a front partial sectional view of a soldering device (electric solder desoldering iron 60, 70) according to the fourth 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. 9 (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, the tip of the tip provided at the tip of the protection pipe 66

At 63, a cylindrical suction nozzle 62 is screwed to the tip (it may be integrally formed with the tip 63). 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. 9 (b) shows a state where the solder suction pipe 71 is passed through the inside of the ceramic heater 4. As the structure of the tip side member 78, the tip of the tip provided at the tip of the protection pipe 76

73 has a through hole 72 penetrating the axis thereof. 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 device (not shown). With this configuration, the heat generated by 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 iron tip member 68 and the connection structure between the iron tip member 78 and the main body member are the same as in the first embodiment. In the case of exchanging parts or 78, the same workability improvement effect as in the first embodiment can be obtained.

Although the first to fourth 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, when the O-ring 12 is used as the elastic member, there are advantages such as having an airtightness maintaining function. However, when it is not particularly necessary, various springs or the like may be used.

Further, the holder 7 may not be a separate member from the protection pipe 6, and the base end of the protection pipe 6 may be modified to have the function of the holder 7. Industrial applicability

As described above, the solder heating device according to the present invention includes: a tip member having an integrated tip at the tip of a cylindrical member for directly contacting and melting the solder; The base end side of the main body is inserted, and the main body side member supports the tip side member via an elastic member. The elastic member is pressed and deformed, so that the elastic member is formed of the tip side member. A pressing unit configured to increase a pressing force for pressing the base end side, wherein the pressing unit changes the pressing force so that at least the pressing force is in a holding state and a small releasing state. In the holding state, the tip member is strongly supported and fixed to the main body member by a large pressing force. In the released state, the tip is pressed by a small pressing force. Weaker tip member Provided is a solder heating device that is configured to be supported and detachable from the main body side member, so that tip replacement can be performed more easily and work efficiency can be improved.

Five can do. In addition, by applying the present invention to a solder heating device of a type that ejects an inert gas, a simpler airtight maintenance mechanism can be obtained.

6

Claims

The scope of the claims

1. A tip side member provided with an integrated tip at the tip of the tubular member to directly contact and melt the solder;

A body-side member to which the base end of the tip-side member is attached, and which supports the tip-side member via an elastic member;

A pressing unit configured to press and deform the elastic member so as to increase a pressing force for pressing the base end side of the tip member by the elastic member; and the pressing unit includes: By changing the pressure, at least the pressing force can be switched between a holding state where the pressing force is large and a releasing state where the pressing force is small,

In the holding state, the tip side member is strongly supported by a large pressing force and fixed to the main body side member.

In the released state, the soldering tip is configured to be weakly supported by a small pressing force so as to be detachable from the main body side member.

2. The pressing means is a nut-shaped member screwed to the main body-side member, and adjusts the pressing force on the elastic member by rotating the nut-shaped member and moving the nut-shaped member in the axial direction. 2. The solder heating device according to claim 1, wherein the device is configured to be switchable between the holding state and the open state.

3. The nut-shaped member is provided with a projection protruding toward the inner diameter side,

A regulating groove into which the projection fits is formed in the main body side member,

When the nut-shaped member is moved in a direction to be detached from the main body side member, the projection comes into contact with the groove wall of the regulating groove at a predetermined position, so that further movement in the detaching direction is regulated. 3. The solder heating device according to claim 2, wherein the device is configured.

4. The solder heating device according to claim 1, wherein the elastic member is an O-ring made of an elastic body.

5. 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 that guides an inert gas from the gas introduction portion to the gas ejection portion via the inside of the main body side member and the inside of the tip side member,

The airtightness of the gas passage at a connection portion between the body-side member and the tip-side member is configured to be maintained by the elastic member. Item 6. A solder heating device according to item 1.

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