JP2010167485A - Soldering iron - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To exchange a soldering iron tip, which is deteriorated by the arrival of a service life or the like, without any possibility of damaging a heater in the soldering iron, in which the small-diameter heater is inserted into the soldering iron tip so as to be freely insertable/removable. <P>SOLUTION: The soldering iron tip 2 and the heater 3 are joined by a joining means, and each base part 4, 5 is charged to the inside of a hollow part for fitting of a grip part so as assemble a soldering iron in a using state. The joining means is composed of: a joining projected part 5d projected to the circumferential side of the tip columnar part 5h of the base part 5 in the heater 3; a joining hole 4h engaged with the joining projected part 5d composed at the base part 4 of the soldering iron tip 2; and a guiding groove 4m composed so as to guide from the tail edge of the base part 4 to the joining hole 4h at the inner circumferential face 2c of the hollow part 2c in the soldering ion tip 2. The guide groove 4m is composed of a part elongating from the tail edge of the base part 4 in the soldering iron tip 2 to the axial direction and a part elongating from the tip thereof to the circumferential direction, and it is connected with the joining hole 4h at the edge part of the latter part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a soldering iron having a small-diameter tip, and more particularly, to a soldering iron of a type in which a small-diameter heater is removably inserted into the tip.

  When soldering a printed circuit board with higher density, the frequency of use of a soldering iron having a small diameter tip is increased. Therefore, naturally, there is a demand for reducing the diameter of the soldering iron, and a soldering iron having a small diameter corresponding to this is provided. On the other hand, when the soldering iron tip is used repeatedly, it deteriorates due to various reasons and needs to be replaced.

At this time, if the tip and the heater that heats the tip are configured integrally, when replacing the tip, the heater that has not yet reached the end of its life is also replaced at the same time. There are many. In many cases, this waste becomes a problem because the life of the tip is much shorter than that of the heater.
In addition, when the heater and the tip are configured separately, when the tip has deteriorated and the life has been reached, only that can be discarded, which is advantageous in terms of cost.
Normally, the tip is externally mounted on the heater that extends from the inside of the grip toward the tip. Therefore, when the tip is removed from the grip, the tip is extended in the direction of extension of the tip. And pulling out while sliding the outer periphery of the heater. When the tip has a small diameter and, of course, the heater also has a small diameter, there is a problem that the heater may be damaged when the tip is pulled out.

  There is no problem if the tip can be pulled straight along the heater, but the tip is usually fixed to the grip part to a certain extent, and it requires a little strong force at the beginning of pulling. At that time, there is a possibility that a force in a direction intersecting the length direction is applied to the heater. Moreover, since the heater is fixed to the grip portion at this time, it cannot move freely in the corresponding direction accordingly. Therefore, at this time, as described above, when the heater has a small diameter, there is a possibility that the heater is easily broken at a portion where force is applied.

  Patent Documents 1 and 2 are examples of a soldering iron in which a tip and a heater are integrally formed. In any case, when the tip is deteriorated due to its life, it is necessary to remove and replace the heater together. As described above, it is inconvenient in terms of cost.

  Patent Documents 3, 4, and 5 are examples of soldering irons in which the tip and the heater are configured separately. In the case of these examples, when the tip deteriorates due to its life, only the tip can be removed and replaced, which is advantageous in terms of cost. Further, as described in each drawing, when the diameter of the heater has a certain thickness, when the tip is pulled out as described above, the heater is moved in the length direction. Even if a slight crossing force is applied, damage does not easily occur. However, when the diameter is small, there is a possibility that damage such as easy breakage may occur. In order to secure a sufficient thickness of the cylindrical portion surrounding the heater from the viewpoint of making the tip easy to control to the target temperature with high heat storage, the heater must be configured with a small diameter. In particular, especially when the tip itself has a small diameter, the heater must be of a smaller diameter, and it is easier to cause damage when replacing the tip. It is.

  Patent Document 6 relates to a soldering iron in which a tip and a heater are configured separately. This is because a cylindrical heater 4 is fixed to a mounting base 3 formed at the tip of the handle 2 of the soldering iron 1, and a body portion 42a of a core metal 42 is inserted into the hollow portion of the heater 4, so With the portion 42b exposed from the tip of the heater 4 and the rear end surface 5c of the tip 5 in contact with the end surface 42c of the head 42b of the core 42, the core 42 and the tip 5 are These are fixed to the mounting base 3 via an outer pipe 6 that covers them and a holding ring 7 that is screwed to the mounting base 3 in order to attach the outer pipe 6 to the mounting base 3.

  Therefore, according to the soldering iron 1 of this Patent Document 6, if the retaining ring 7 is removed from the mounting base 3, the head of the cored bar 42 in which the tip 5 is arranged on the heater 4 without requiring a particularly large force. Needless to say, when the tip 5 needs to be replaced, it is not necessary to replace the heater 4 at the same time. In that case, the heater 4 is damaged. It is thought that there is little possibility of causing. Therefore, it can be said that it is excellent as long as it is.

  However, current soldering irons must be temperature-controllable in relation to the soldering object that is sensitive to the temperature of semiconductors, etc. It is necessary to measure. In order to accurately measure the tip temperature, it is necessary to measure at a location as close as possible to the tip of the tip, so it is necessary to attach a sensor to any location close to the tip of the tip, In the configuration of Patent Document 6, it is not considered easy to attach such a sensor and route the lead wire.

  Further, according to the soldering iron 1 of Patent Document 6, the tip 5 is in contact with the end face 42c of the head portion 42b of the core metal 42, and the area of the contact portion is made as wide as possible. Although it is intended to do so, it is the tip of the small-diameter shaft-like portion, so its width is very small, and it is difficult to ensure that a sufficient amount of heat is transmitted. Further, the outer pipe 6 is used to fix the tip 5 to the end face 42c of the head portion 42b of the core metal 42. However, in such an application, it is necessary to fix the tip 5 firmly. I have to adopt a certain amount of thickness as a pipe. Therefore, as a result, it must be said that the tip is slightly thicker and it is difficult to reduce the size sufficiently.

Japanese Patent Laid-Open No. 10-258358 Japanese Utility Model Publication No. 02-053870 JP 05-185219 A JP-A-10-239167 Japanese Patent Application Laid-Open No. 07-040037 JP-A-10-328822

  The present invention relates to a soldering iron having a small-diameter tip, in particular, a soldering iron in which a small-diameter heater is removably inserted into the tip, and the iron is deteriorated due to the end of its service life or the like. It is an object of the present invention to provide a soldering iron that can be replaced without fear of damaging the heater inserted in the tip.

A first aspect of the present invention includes a grip portion having a mounting hollow portion that opens at the tip, a heater that removably attaches a base portion to the mounting hollow portion, and a cylindrical heating portion of the heater that is externally provided with the hollow portion. On the other hand, in a soldering iron comprising a tip that is detachably attached to the mounting hollow part,
A coupling means for detachably coupling the columnar heating part to the heater and the iron tip in a state where the cylindrical heating part is sheathed by the hollow part is configured, and the heater and the iron tip are coupled by the coupling means. The soldering iron is configured such that each base portion can be removably attached to the mounting hollow portion of the grip portion in a state where the two are coupled.

2 of the present invention is the soldering iron of 1 of the present invention.
The coupling means;
Of the base of the heater, a coupling protrusion that protrudes to the peripheral side of the tip cylindrical portion that is inserted and fitted into the hollow portion of the tip;
A coupling hole for fitting the coupling protrusion formed on the base of the tip, and when the cylindrical heating portion of the heater is inserted into the hollow portion of the tip, the tip cylinder of the base of the heater A coupling hole that opens from the hollow part into which the part is inserted to the circumferential side of the base part of the tip, and a guide groove that is configured to guide the hollow part of the tip from the rear end of the base to the coupling hole. A guide groove comprising an axially extending portion and a circumferentially extending portion of the tip, the guide groove being connected to the coupling hole at the end of the latter portion;
It is composed of

3 of the present invention is the soldering iron of 1 of the present invention.
The coupling means;
Two extension arms extending in parallel to the tip cylindrical portion from the positions on both sides of the tip cylindrical portion where the cylindrical heating portion is arranged at the tip of the base of the heater, and the tips of the two extension arms are mutually connected A locking protrusion that protrudes to a facing portion, and the locking surface is a locking protrusion that is an inclined surface having an obtuse angle between the locking surface and the surface of the protruding portion of the locking protrusion. ,
Two storage grooves formed on the peripheral side of the base portion of the tip, and a locking hole formed on an inner end of the two storage grooves, the cylindrical heating portion of the heater being a hollow portion of the tip Two storage grooves in which the two extended arms are in a storage state when inserted into the two, and a locking hole in which the two locking projections are in a locked state,
It is composed of

  According to the soldering iron 1 of the present invention, when this is applied to a small and small diameter soldering iron, when the iron tip is deteriorated due to wear or the like due to use, only the iron tip can be replaced. In this case, there is no fear of damaging the small-diameter cylindrical heating portion of the heater. It is also very easy to handle.

  When removing the tip from the grip part, the base part of the tip and the base part of the heater that is in the interior state and joined to the tip by the coupling means are simultaneously removed from the mounting hollow part of the grip part. become.

  Although the base of the heater differs depending on the configuration, any part of itself is locked to any part of the inner periphery of the mounting hollow part, or the interior is fixed by frictional force, etc. The power receiving connector protruding rearward from the base is coupled to the corresponding power supply connector configured in the mounting hollow portion, and the base of the tip also varies depending on the configuration. Any part of the side part of itself is similarly engaged with any part of the inner periphery of the mounting hollow part, or the interior is fixed by frictional force or the like, For example, the electrode at the end of the lead wire of the temperature sensor or the electrode of the ground wire formed in any part of the side part is in contact with the corresponding spring-like contact protruding from the inner periphery of the mounting hollow part. And held state You have me.

  Therefore, when the tip is to be pulled out from the mounting hollow portion of the grip portion, it must be pulled out with a corresponding force. However, as described above, the tip is connected to the heater by the mutual connecting means in a state where the cylindrical heating portion of the heater is inserted into the hollow portion, and when the tip is pulled, In this state, the connection of the mutual connectors is released, the engagement state between each electrode and each spring-like contact is released, and the two base portions and the mounting hollow portion are pulled out against the corresponding frictional force and the like. Will be. Therefore, even if the cylindrical heating part of the heater has a small diameter and is easily damaged, it is damaged in the extraction process because it is protected by the hollow part of the tip. There is nothing.

  When the tip and the heater are not connected by the above connecting means, when the tip is pulled out, only the tip is pulled out, and the heater is placed in the mounting hollow portion of the grip portion. The state is left in a fixed state. As described above, the tip is fixed in the mounting hollow portion, and usually cannot be pulled out unless pulled with a corresponding force. Therefore, when pulling out this, it is practically difficult to move the tip always in a straight line along the axis of the grip portion, and a slight force is applied in the direction intersecting it. It is almost unavoidable. Since the heater is fixed in the mounting hollow portion as described above, and therefore cannot move in accordance with the movement of the tip, the tip is attached to the cylindrical heating portion as described above. A force in the direction intersecting the axis is applied during extraction. As a result, at this time, the cylindrical heating portion of the heater may be damaged with high probability.

As described above, according to the soldering iron 1 of the present invention, when the iron tip is extracted, the heater is also extracted at the same time, so the above problem does not occur.
And after extracting a tip with a heater in this way, the coupling | bonding by a coupling | bonding means is cancelled | released by operation corresponding to the structure, and the columnar heating part of a heater is extracted from the hollow part of a tip. Even at this time, it is difficult to reliably perform the operation of pulling the tip and the heater linearly along the mutual axis, but in this case, the heater and the tip are fixed to anything. However, the movements corresponding to the other movement are possible and can be pulled out without difficulty. Therefore, there is almost no possibility of causing damage to the cylindrical heating portion.

  After this, a new tip is prepared, and the cylindrical heating part of the heater drawn out earlier is inserted into the hollow part, and the mutual coupling state is secured by mutual coupling means. The heater is inserted into the mounting hollow portion of the grip portion from the base side. Naturally, the insertion operation is performed after the circumferential direction is properly directed by the mutual positioning marks attached to the base portion and the grip portion. If pushed to an appropriate position, as described above, the connector fixed in a fixed state such as the connector in the mounting hollow portion of the grip portion corresponding to the connector arranged on the base of the heater is connected. Become. Also at this time, the columnar heating portion of the heater is protected by being inserted into the hollow portion of the tip, and needless to say, there is no risk of damage.

  According to the soldering iron of No. 2 of the present invention, when applied to a small-diameter soldering iron like the soldering iron of No. 1 of the present invention, when the tip is replaced due to the life of the tip, etc. In addition, there is no risk of causing damage to the cylindrical heating portion of the heater, and the handling thereof is very simple.

In the soldering iron of No. 2 of the present invention, in particular, the structure of the coupling means is simple and the operation is very simple.
When the cylindrical heating part is inserted into the hollow part of the tip, the connection between the tip and the heater is near the end of the insertion, and the connecting protrusion protruding from the tip cylindrical part of the base of the heater is applied. After inserting into the guide groove opened at the rear end of the tip base, it is pushed in as it is, and this time, when it is rotated in a predetermined direction at the push-in end, the coupling protrusion is pushed through the portion extending in the circumferential direction. They enter the coupling holes in the previous base and are in a coupled state. At the same time, the insertion of the cylindrical heating part into the hollow part is also completed.

  In this state, the tip and the heater can rotate in opposite directions in the circumferential direction, but are fixed in the axial direction. Therefore, as described for the soldering iron 1 of the present invention, the mutual fixing state is ensured when the grip portion is inserted into and removed from the mounting hollow portion.

  To release the coupling between the tip and the heater, the tip and the heater are rotated in opposite directions so that the coupling protrusion can be moved through a portion extending in the circumferential direction of the guide groove. The coupling protrusions may be pulled together so as to move through the portion extending in the axial direction. Thus, it is possible to release the mutual coupling and to separate the tip and the heater.

  According to the soldering iron of 3 of the present invention, when applied to a small-diameter soldering iron as in the case of the soldering iron of 1 or 2 of the present invention, the cylindrical heating of the heater is performed when replacing the tip. There is no risk of causing damage to the part, and its handling is very simple.

Similarly to the soldering iron of the present invention 2, the soldering iron of the present invention 3 has a particularly simple structure of the coupling means, and its operation is extremely simple.
When the cylindrical heating part is inserted into the hollow part of the tip, the extension arm that extends from the base part of the heater to the tip cylindrical part corresponds to the tip part of the tip. When it enters into the two storage grooves formed on the side and advances, and the cylindrical heating part is pushed into the hollow part to the end, the locking projection that protrudes from the tip of the extension arm is the most in the storage groove. The engagement is completed in the engagement hole on the inner end which is the back side, thereby completing the coupling.

  According to the soldering iron of 3 of the present invention, in the same manner as described for the soldering iron of 1 of the present invention, in this state, when the grip portion is inserted into and removed from the mounting hollow portion, the mutual fixing is performed. The state will be secured.

  To release the connection between the tip and the heater by the connecting means, it is only necessary to slightly pull the connected tip and the heater slightly in the disengagement direction. The locking surface of the locking projection that is locked in the locking hole of the tip is configured as an inclined surface in which the angle between this and the surface of the extension arm on the side of the locking projection is an obtuse angle. Therefore, when pulled slightly strongly, the locking projection moves away from the locking hole by moving the locking surface of the locking hole while the locking surface slides. Of course, this is based on the premise that the locking arm has elasticity. If the tip and the heater are pulled in the direction away from each other as they are, the latter cylindrical heating part will also be detached from the former hollow part, the mutual coupling will be released, and the tip and heater This will complete the separation.

(a) is a front view of the soldering iron of Example 1, (b) is a right side view, (c) is a rear view, and (d) is an enlarged plan view. (a) is the front view of the soldering iron tip and heater of Example 1 in a separated state, (b) is a right side view, and (c) is a rear view. (a) is a front view of the grip portion of the soldering iron of Example 1, (b) is a front view of the tip in a state where it is combined with the heater of the soldering iron of Example 1, and (c) is Example 1. The right side view of the grip part of the soldering iron, (d) is the right side view of the tip in a state where it is combined with the heater of the soldering iron of Example 1, and (e) is the soldering iron of Example 1. The rear view of a grip part, (f) is the rear view of the tip of the state couple | bonded with the heater of the soldering iron of Example 1. FIG. (a) is an enlarged right side view near the base of the heater of the soldering iron of Example 1, (b) is an enlarged rear view, and (c) is an enlarged back of the base of the soldering iron tip of Example 1. Figure, (d) is a bottom view of (c). AA line sectional view of (a) of Drawing 3. (a) is an enlarged rear view of the soldering base of the second embodiment in which the soldering base and the heater base constituting the coupling means are separated, (b) is an enlarged rear view of the coupling means in a coupled state, c) is an enlarged bottom view of the tip, and (d) is an enlarged plan view of the heater.

  A mode for carrying out the invention will be described in detail based on an embodiment with reference to the drawings.

<Example 1>
As shown in FIGS. 1 and 3, the soldering iron of Example 1 basically includes a grip portion 1, a tip 2, and a heater 3, and the tip 2 and the heater 3 are connected to each other. As the coupled state, the base portions 4 and 5 are inserted into the mounting hollow portion 6 of the grip portion 1 so that they can be assembled in a use state.

  Most of the configurations of the grip portion 1, the tip 2 and the heater 3 are the same as those of the existing one, and the tip 2 of the grip portion 1 and the point where the tip 2 and the heater 3 are connected to each other and the tip of the grip portion 1 are assisted. Only the point which comprised the holder 7 is a new matter. Therefore, the new matter will be described in detail, and the same configuration as the existing one will be described briefly.

  As shown in FIGS. 3A, 3C, and 5 and FIG. 5, the grip portion 1 includes a mounting hollow portion 6 that opens at the tip. As shown in the figure, the mounting hollow portion 6 has a male connector 6c connected to a female connector 5c protruding from the base portion 5 of the heater 3 in a projecting state at the innermost portion. A lead from a thermocouple (temperature sensor) 2 s formed on the lower front side of the former base 4 with the base 4 of the tip 2 and the base 5 of the heater 3 inserted in the inner peripheral surface The spring-like contacts 6b1 and 6b1 that are in contact with the electrodes 4s1 and 4s1 at the end of the wire and the other spring-like contacts 6b2 that are in contact with the electrode 4s2 at the end of the ground wire that is formed on the back side surface of the former base 4 are configured. It is. Each is an existing configuration, and each is connected to one end of a corresponding number of cables extending from the rear end of the grip portion 1.

  Further, the mounting hollow portion 6 includes inner guide ribs 5p and 5p that protrude along the length direction on both sides of the rectangular plate-like base portion 5 of the heater 3, as shown in FIG. Guide grooves 6m and 6m are formed along the axial direction at corresponding portions of the circumference. Further, the cross-sectional shape of the mounting hollow portion 6 is substantially circular as shown in the figure, and corresponds to the cross-sectional shape of the base portion 4 of the tip 2.

  The tip 2 has the same basic configuration as the existing one. As shown in FIGS. 2 (a), (b), (c) and FIGS. 3 (b), (d), (f), the tip 2a and the base 4 are formed. Although there are various shapes, those in the first embodiment are of a standard shape composed of a cylindrical portion and a most advanced tapered portion. Further, the tip 2 is formed with a hollow portion 2c extending along the axial center from the rear end portion of the base portion 4 to the vicinity of the most distal end of the pointed portion 2a, and the columnar heating portion 3a of the heater 3 and thereafter The tip cylindrical portion 5h connected to the end can be inserted in a close contact state. In the first embodiment, the cylindrical portion of the tip 2a is made thick for the purpose of improving the thermal responsiveness. Therefore, the hollow portion 2c naturally has a small diameter, and the columnar heating of the heater 3 to be inserted therein Naturally, the portion 3a has a corresponding small diameter.

  As shown in FIGS. 1 (a), (b), FIGS. 2 (a), (b) and FIGS. 3 (b), (d), the tip 2a of the tip 2 has its leading edge. The detection end of the thermocouple 2s is fixed near the boundary between the tapered portion and the cylindrical portion, the outer periphery of the cylindrical portion is extended along the length direction to the front end of the base portion 4, and the base portion 4 is extended. Then, the lead wires are connected to the electrodes 4s1 and 4s1 formed at the rearmost part on the front side thereof by lead wires. Further, as shown in FIGS. 2 (c) and 3 (f), an electrode 4s2 connected to the end of the ground wire connected to the tip 2a is formed on the back side of the base 4 of the tip 2. is there.

  The base 4 of the tip 2 is formed in a substantially cylindrical shape having a slightly larger diameter than the pointed portion 2a, and the electrodes 4s1, 4s1, and 4s2 are formed as described above. Further, particularly as shown in FIGS. 4C and 4D, a coupling hole 4h and a guide groove 4m forming a part of the coupling means are formed.

  As shown in FIGS. 2 (a), (b), (c) and FIGS. 4 (c), (d), the coupling hole 4h is connected to the rear end of the base 4 of the tip 2 and to the rear end. It is opened near the middle of the rear end of the electrode 4s2 connected to the line. The coupling hole 4h is opened so as to communicate with the hollow portion 2c.

  As shown in the figure, the guide groove 4m comprises a portion extending in the axial direction from the rear end of the base portion 4 and a portion extending in the circumferential direction, and is connected to the coupling hole 4h at the end of the latter. . The portion extending in the axial direction of the guide groove 4m has moved to the side in the circumferential direction by approximately 45 degrees with respect to the axial center of the coupling hole 4h opened on the back side, as shown in FIG. 4 (d). The post-joining projection 5d is formed to have a width that allows it to pass with a margin with respect to the position. A portion extending in the circumferential direction of the guide groove 4m is directed to connect to the coupling hole 4h from a tip of the axially extending portion, that is, a position of an angular interval of about 45 degrees in the circumferential direction of the coupling hole 4h. Naturally, it is formed to have substantially the same width as the portion extending in the axial direction. The connecting portion between the two is configured to bend in an arc.

  The basic structure of the heater 3 is the same as that of the existing one as with the tip 2. As shown in FIGS. 2 (a), 2 (b), and 2 (c), it basically comprises a columnar heating portion 3a that extends long on the tip side and a base portion 5 at the rear thereof, and the diameter of the columnar heating portion 3a The length corresponds to the hollow portion 2c of the tip 2 and is configured to be dimensioned so that it can be inserted in close contact therewith. The base 5 has a rectangular plate shape as a main configuration, and guide protrusions 5p and 5p are formed on both sides along the length direction. Moreover, the subordinate structure is the front-end | tip cylindrical part 5h mentioned later. The guide protrusions 5p and 5p can be slidably fitted into the guide grooves 6m and 6m of the mounting hollow portion 6 of the grip portion 1 as described above. Further, a female connector 5c for receiving power of the cylindrical heating portion 3a is formed at the rear end of the base portion 5. Needless to say, the female connector 5c is connected to a male connector 6c disposed at the innermost portion of the mounting hollow portion 6 of the grip portion 1.

  As shown in FIGS. 2 (a), (b), (c) and FIGS. 4 (a), (b), the base 5 has a rectangular plate shape to support the rear end of the columnar heating portion 3a. A tip cylindrical portion 5h having a slightly larger diameter than the cylindrical heating portion 3a is formed at the center of the tip of the portion. The hollow portion 2c of the tip 2 is inserted up to the tip cylindrical portion 5h. Needless to say, the rear part of the hollow part 2c has a diameter of a corresponding dimension. The coupling protrusion 5d is protruded on the tip peripheral side of the tip cylindrical part 5h. The coupling protrusion 5d protrudes on the circumferential side of the tip cylindrical part 5h in a positional relationship that becomes the center of the back side of the base part 5. Further, the coupling protrusion 5d is configured to have a size that can be fitted or passed through the coupling hole 4h and the guide groove 4m formed in the base 4 of the tip 2.

  The auxiliary holder 7 is a member formed by bending a wire-like member as shown in FIGS. 1 (a), (b), (c) and FIGS. 3 (a), (c), (e). . Specifically, the auxiliary holder 7 is a member that is rotatably inserted into two shaft holes whose both ends are opened at an angular interval of 180 degrees in the most circumferential direction of the grip portion 1. In the middle portion, when this is caused, the concave portion 7a to be engaged with the portion immediately above the heat radiating portion 2h at the tip of the base portion 4a of the tip portion 2a of the tip 2 attached to the grip portion 1 and the knob behind the pinion 7b. This is intended to ensure that the tip 2 with the base 4 inserted into the mounting hollow portion 6 of the grip portion 1 is maintained in that state. However, even if this is not present, the possibility that the tip 2 will come off is extremely low.

  Therefore, according to the soldering iron of Example 1, when the tip 2 is deteriorated due to wear or the like due to use, it is possible to replace only the tip 2 and it is economical. At that time, there is no fear of damaging the small-diameter columnar heating section 3a of the heater 3. The replacement operation is also performed by removing the tip 2 and the heater 3 from the grip portion 1, removing the heater 3 from the tip 2, and then removing the heater 3 that has just been removed from the tip 2. There are two steps in both the removal and mounting operation of the tip 2 such as insertion and insertion into the grip portion 1 in a state where the tip 2 and the heater 3 are integrated. This is an operation that can be performed in a short time and has no inconvenience.

  When removing the tip 2 from the grip portion 1, first, the auxiliary holder 7 is tilted outward as shown by a two-dot chain line in FIG. The base part 5 of the heater 3 in which the cylindrical heating part 3 a is inserted and coupled to the hollow part 2 c of the tip 2 is simultaneously extracted from the mounting hollow part 6 of the grip part 1.

  As shown in FIGS. 1 (a), (b), (c), and (d), when the tip 2 is attached to the grip portion 1 together with the heater 3, the base portion 5 of the heater 3 is The guide protrusions 5p and 5p on both sides are engaged with the guide grooves 6m and 6m formed in the corresponding side portions of the mounting hollow portion 6 of the grip portion 1, and protrude rearward from the base portion 5. A female connector 5c for receiving electric power is connected and fixed to a male connector 6c arranged at the innermost part of the mounting hollow portion 6. Also, the base 4 of the tip 2 has its own peripheral side part fixed to the inner periphery of the mounting hollow part 6 by frictional force or the like, and is further provided with an electrode 4s1 disposed on the front side of the base part 4. 4s1 is elastically contacted by spring-like contacts 6b1 and 6b1 projecting from the mounting hollow portion 6, and another spring projecting from the mounting hollow portion 6 is disposed on the electrode 4s2 disposed on the back side of the base portion 4. Similarly, the contact 6b2 is elastically contacted, and the base 4 is held.

  Therefore, if the base part 4 of the tip 2 is to be pulled out from the mounting hollow part 6 of the grip part 2, it must be pulled out with a corresponding force applied. As described above, in the tip 2, the cylindrical heating portion 3a of the heater 3 is inserted into the hollow portion 2c, and the coupling protrusion 5d of the latter base 5 is inserted into the coupling hole 4h of the former base 4. As shown in FIGS. 3 (b), 3 (d) and 3 (f), they are fitted and thereby connected to the heater 3. When the tip 2 is pulled, the grip portion 1 is in that state. In the mounting hollow portion 6, the coupling between the female and male connectors 5c, 6c is released, and the electrodes 4s1, 4s1 and the spring-like contacts 6b1, 6b1, and the electrode 4s2 and the spring-like contact 6b2 are engaged. The engagement state is released and the engagement state by the frictional force between the guide protrusions 5p and 5p of the base portion 5 of the heater 3 and the guide grooves 6m and 6m of the mounting hollow portion 6, the peripheral side of the base portion 4 of the tip 2 The engagement state by the frictional force between the part and the inner peripheral surface of the mounting hollow part 6 is released, and the slide movement It will be withdrawn while.

  Thus, when the tip 2 is extracted, even if the cylindrical heating portion 3a of the heater 3 has a small diameter and is easily damaged, this is caused by the hollow portion 2c of the tip 2. Since it is protected, no damage will occur during this extraction process.

  When the tip 2 and the heater 3 are not connected by the connecting hole 4h and the connecting protrusion 5d, as described above, when the tip 2 is pulled out, only the tip 2 is extracted. The heater 3 is left in a state of being fixed in the mounting hollow portion 6 of the grip portion 1. Therefore, it is impossible to release the unnecessary lateral force applied to the cylindrical heating portion 3a in the process of extracting the tip 2, and the cylindrical heating portion 3a is damaged with high probability by receiving the force as it is. There are problems that will occur. However, as described above, according to the soldering iron of the first embodiment, when the tip 2 is extracted, the heater 3 is also extracted at the same time.

  After the tip 2 is removed from the mounting hollow portion 6 of the grip portion 1 together with the heater 3, the base portion 5 of the heater 3 is grasped and rotated to the right by about 45 degrees with respect to the tip 2. When the cylindrical heating part 3a is pulled away from the tip 2, the coupling protrusion 5d is detached from the coupling hole 4h and extends in the circumferential direction and the axial direction of the guide groove 4m. And the cylindrical heating portion 3a of the heater 3 can be easily extracted from the hollow portion 2c of the tip 2.

  At this time, as described above, it is difficult for the tip 2 and the heater 3 to be pulled along a straight line along the axis of each other. In this case, the heater 3 is also the tip 2. Is not fixed to anything, and can move in correspondence with the other movement, can be pulled out without difficulty, and there is almost no risk of causing damage to the cylindrical heating section 3a. .

  After this, a new tip 2 is prepared, and the columnar heating portion 3a of the heater 3 that has just been extracted is inserted into the hollow portion 2c. This insertion is performed in a state in which the coupling protrusion 5d of the heater 3 is positioned at a position rotated to the right by about 45 degrees in the circumferential direction with respect to the coupling hole 4h of the base 4 of the tip 2. Of course, it is not necessary to do so from the beginning of the insertion of the cylindrical heating section 3a. At the latest, when the tip cylindrical portion 5h of the base portion 5 of the heater 3 is about to enter the hollow portion 2c of the tip 2, the coupling protrusion 5d that protrudes to the outer periphery of the tip end of the tip cylindrical portion 5h is formed as described above. The guide groove 4m is entered and pushed, and when it collides with the innermost end of the axially extending portion of the guide groove 4m, it is rotated to the left side, the circumferentially extending portion is passed through, and inserted into the coupling hole 4h. To the mated state.

  After the tip 2 and the heater 3 are temporarily fixed in this manner, the base portions 4 and 5 of the tip 2 and the heater 3 are inserted into the mounting hollow portion 6 of the grip portion 1. At this time, if the direction of the circumferential direction is made to correspond appropriately by the positioning chevron mark attached to the base portion 5 of the heater 3 and the tip of the grip portion 1, the guide protrusion of the base portion 5 of the heater 3 is inserted. The strips 5p and 5p are slidably engaged with the guide grooves 6m and 6m of the mounting hollow portion 6, and the base portion 4 of the tip 2 is similarly slidably engaged with the inner periphery of the mounting hollow portion 6. When the base portions 4 and 5 are pushed to an appropriate depth, as described above, the female connector 5c of the heater 3 and the male connector 6c in the mounting hollow portion 6 of the grip portion 1 are fitted and connected. The spring-like contacts 6b1 and 6b1 protruding into the mounting hollow portion 6 are elastically brought into contact with the electrodes 4s1 and 4s1 arranged on the base portion 4 of the tip 2, and the other electrodes 4s2 of the base portion 4 are in contact with each other. Is another spring-like connector protruding into the mounting hollow portion 6. Transfected 6b2 is that resiliently abuts. Thus, the operation of inserting the tip 2 and the bases 4 and 5 of the heater 3 into the mounting hollow portion 6 of the grip portion 1 is completed.

  Even during this operation, the columnar heating portion 3a of the heater 3 is protected by being inserted into the hollow portion 2c of the tip 2, and needless to say, there is no risk of damage.

  Finally, when the auxiliary holder 7 is raised and the tip 2 is prevented from coming off by the recess 7a as shown by solid lines in FIGS. The holding operation is also completed.

<Example 2>
The soldering iron of the second embodiment is almost the same as the soldering iron of the first embodiment, and the only difference is the coupling means. Instead of the coupling hole 4h, the guide groove 4m and the coupling projection 5d of the first embodiment, the two extended arms 15a and 15a, the locking projections 15t and 15t at the tip, the two storage grooves 14g and 14g and the engagement at the tip. Stop holes 14k, 14k are provided. Since only the above points are different from the soldering iron of the first embodiment, only those points will be described. The same parts as those in Example 1 are used for the same parts.

  The extension arms 15a, 15a are extended from positions on both sides of the tip cylindrical portion 5h of the base portion 5 of the heater 3, as shown in FIGS. 6 (a), 6 (b), and 6 (d). As shown in the figure, the two extension arms 15a and 15a extend in parallel to the tip cylindrical portion 5h, and project the locking projections 15t and 15t on the surfaces of the tips facing each other. The locking projections 15t and 15t have locking surfaces that are locked to the surface opposite to the distal end surfaces of the extension arms 15a and 15a, that is, the peripheral edges of the locking holes 14k and 14k. , 15a is formed on an inclined surface having an obtuse angle with the surface on which the locking projections 15t, 15t are projected. This is to make the engagement state with the locking holes 14k, 14k detachable. The other three surfaces of the locking projections 15t and 15t are linearly extended from the extension arms 15a and 15a, and the tip is a surface parallel to the extension arms 15a and 15a.

  The extension arms 15a and 15a need to be made of a member having elasticity. In the second embodiment, since the extension arms 15a and 15a are formed integrally with the base portion 5 of the heater 3, it is necessary to make the members constituting the base portion 5 elastic. In Example 2, it was made of a synthetic resin having elasticity.

  As shown in FIGS. 6 (a), 6 (b), and 6 (c), the two storage grooves 14g and 14g are formed so that the cylindrical heating portion 3a of the heater 3 is hollow in the tip 2 in an appropriate circumferential direction. When inserted into the portion 2c, it corresponds to the position where the extension arms 15a, 15a are arranged, on both sides of the base portion 4 of the tip 2 (both positions at an angular interval of 180 degrees) in its length direction. Along the corresponding length, depth and width.

  Further, the locking holes 14k, 14k are formed at the tip end portions of the storage grooves 14g, 14g toward the depth direction toward the axis side of the base portion 4 (direction intersecting the axis). The locking holes 14k and 14k are holes penetrating to the hollow portion 2c formed inside. Of the peripheral edges of the locking holes 14k, 14k, the portion corresponding to the rear end side of the base 4 is a surface corresponding to the locking protrusions 15t, 15t, as shown in FIGS. 6 (a) and 6 (b). It is configured to have an inclination corresponding to a certain locking surface.

  Therefore, according to the soldering iron of the second embodiment, like the soldering iron of the first embodiment, when the tip 2 is deteriorated due to wear or the like due to use, only the tip 2 can be replaced. In addition, it is extremely economical, and there is no possibility of causing damage to the columnar heating portion 3a of the heater 3 when the tip 2 is replaced, and the handling thereof is also extremely simple.

  The tip 2 and the heater 3 can be joined together by inserting the cylindrical heating portion 3a into the hollow portion 2c of the tip 2 so that the direction of the circumferential direction coincides with the tip of the latter 5 to the tip. Extending arms 15a and 15a extending across the cylindrical portion 5h move into two storage grooves 14g and 14g formed on corresponding side portions of the former base portion 4 to advance, and the cylindrical heating portion 3a is moved into the hollow portion. When the end is pushed into 2c and inserted, the locking projections 15t and 15t projected from the ends of the extension arms 15a and 15a are at the innermost locking holes 14k and the innermost locking holes 14k and 14g, 14 k falls and is locked thereto, and thus the coupling between the tip 2 and the heater 3 is completed.

  Therefore, according to the soldering iron of the second embodiment, in the above state, in the same manner as described for the soldering iron of the first embodiment, those base portions 4 to the mounting hollow portion 6 of the grip portion 1, At the time of loading and unloading 5, the mutual fixing state of the tip 2 and the heater 3 is ensured.

  Release of the connection between the tip 2 and the heater 3 by the locking holes 14k and 14k and the locking projections 15t and 15t can be achieved simply by pulling the connected tip 2 and the heater 3 strongly in the disengagement direction. The locking surfaces of the locking projections 15t and 15t locked to the locking holes 14k and 14k of the base 4 of the tip 2 project this and the locking projections 15t and 15t of the extension arms 15a and 15a. The angle between the surface to be made to be an obtuse angle and the corresponding peripheral portions of the locking holes 14k, 14k are also formed at the same angle, and the extension arms 15a, 15a are elastic. Since it is made of a material having a characteristic, if the tip 2a of the tip 2 and the base 5 of the heater 3 are gripped and pulled strongly in the direction of separating them, the locking projections 15t, 15t It moves while sliding on the peripheral edge, which is the locking portion of 14k, 14k, and is detached from the locking holes 14k, 14k. If the tip 2 and the heater 3 are continuously pulled in the direction in which they are separated from each other, the cylindrical heating portion 3a of the heater 3 is also detached from the hollow portion 2c of the tip 2, and the mutual coupling is released. At the same time, the separation of the tip 2 and the heater 3 can be completed.

  The attaching and detaching of the tip 2 and the grip 3 of the heater 3 to the mounting hollow portion 6 and the other operations can be performed in the same manner as in the first embodiment.

1 Grip part 2 Tip 2a Pointed part 2c Hollow part 2h Heat radiation part 2s Thermocouple (temperature sensor)
DESCRIPTION OF SYMBOLS 3 Heater 3a Cylindrical heating part 4 Tip base 4h Coupling hole 4m Guide groove 4s1, 4s2 Electrode 5 Heater base 5c Female connector 5h Tip cylindrical part 5d Coupling protrusion 5p Guide protrusion 6 Mounting hollow part 6b1, 6b2 Spring-like contact 6c Male connector 6m Guide groove 7 Auxiliary holder 7a Recess 7b Knob 14g Storage groove 14k Locking hole 15a Extension arm 15t Locking protrusion

Claims (3)

A grip portion having a mounting hollow portion opened at the tip, a heater for detachably mounting the base portion in the mounting hollow portion, and a base mounting hollow while the cylindrical heating portion of the heater is covered with the hollow portion In a soldering iron consisting of a tip that is detachably attached to the part,
A coupling means for detachably coupling the columnar heating part to the heater and the iron tip in a state where the cylindrical heating part is sheathed by the hollow part is configured, and the heater and the iron tip are coupled by the coupling means. A soldering iron configured such that each base portion can be removably attached to the mounting hollow portion of the grip portion in a state where the two are coupled. The coupling means;
Of the base of the heater, a coupling protrusion that protrudes to the peripheral side of the tip cylindrical portion that is inserted and fitted into the hollow portion of the tip;
A coupling hole for fitting the coupling protrusion formed on the base of the tip, and when the cylindrical heating portion of the heater is inserted into the hollow portion of the tip, the tip cylinder of the base of the heater A coupling hole that opens from the hollow part into which the part is inserted to the circumferential side of the base part of the tip, and a guide groove that is configured to guide the hollow part of the tip from the rear end of the base to the coupling hole. A guide groove comprising an axially extending portion and a circumferentially extending portion of the tip, the guide groove being connected to the coupling hole at the end of the latter portion;
The soldering iron according to claim 1, comprising: The coupling means;
Two extension arms extending in parallel to the tip cylindrical portion from the positions on both sides of the tip cylindrical portion where the cylindrical heating portion is arranged at the tip of the base of the heater, and the tips of the two extension arms are mutually connected A locking protrusion that protrudes to a facing portion, and the locking surface is a locking protrusion that is an inclined surface having an obtuse angle between the locking surface and the surface of the protruding portion of the locking protrusion. ,
Two storage grooves formed on the peripheral side of the base portion of the tip, and a locking hole formed on an inner end of the two storage grooves, the cylindrical heating portion of the heater being a hollow portion of the tip Two storage grooves in which the two extended arms are in a storage state when inserted into the two, and a locking hole in which the two locking projections are in a locked state,
The soldering iron according to claim 1, comprising:

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