JP2016059925A - Cleaning device for soldering iron tip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically drive a motor 119 which has a high versatility and applies no load on the tip in a configuration which employs a rotary brush 132 to be capable of automatically driving the motor 119 for driving this rotary brush 132 when cleaning a soldering iron 2.SOLUTION: This cleaning device comprises: a casing 100; an electric conductive rotary brush 132, which maintains an electrical isolation state with respect to the casing 100 and is rotatably retained; a motor 119 for driving the rotary brush 132; a motor power feeding circuit 164 for feeding power to the motor 119; a detection line 172 for impressing voltage on the rotary brush 132 with the ground side isolated; and a switch circuit 171 by energization on connection with the motor power feeding circuit 164 to make the tip 21 of a soldering iron 2 come in contact with the rotary brush 132, and thus to make the detection line 172 come in connection with the ground side of the tip 21, thereby closing the motor power feeding circuit 164 of the motor 119.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a soldering iron tip cleaning device.

  The soldering iron tip cleaning device is a device that removes deposits such as oxides of solder and flux on the soldering iron tip that is manually operated. . A typical tip cleaning device is a metal web that wipes off the tip of a soldering iron and is placed on a receiving tray. The user rubs the tip of the web to remove the deposits.

  By the way, since a web is metal, the apparatus comprised so that a soldering iron and a web might be electrically connected and a predetermined test | inspection might be performed is proposed. For example, the apparatus described in Patent Document 1 is configured to detect a leak current from a tip when the leak inspection machine is electrically connected to the web and the tip and the web are connected. Yes.

  On the other hand, a rotating brush or cleaner driven by a motor is used instead of the web placed on the tray, and the motor is automatically driven by detecting that the soldering iron is mounted at a predetermined position. A proposed device has also been proposed. For example, Patent Document 2 discloses a cylindrical upright into which a soldering iron tip is inserted, a limit switch arranged inside the upright, a motor driven by connection of the limit switch, and this motor. An apparatus is disclosed that includes a cleaner that is driven and rotated. In the device of Patent Document 2, when the tip is inserted up to a predetermined stroke in this upright, the limit switch is connected to the tip, the motor is operated, and the cleaner is rotated. . Further, Patent Document 3 discloses a cleaner driven by a motor, a casing that houses the cleaner, a shutter that opens and closes an opening of the casing, and a limit switch that is connected using movement when the shutter is opened and closed. An apparatus comprising: The shutter normally closes the opening, and is configured to open the opening by being pushed in by a tip during cleaning.

JP 2008-254057 A Japanese Utility Model Publication No. 02-32367 Japanese Patent No. 3153813

  In the configuration of Patent Document 1, only detection of leakage current is performed, and the brush cannot be driven.

  On the other hand, in the configuration of Patent Document 2, since the soldering iron is detected based on the stroke when the soldering iron is inserted into the upright, in order to operate the limit switch with certainty, The length needed to fit the limit switch installation location. Therefore, when the lengths of the soldering irons are different, it is necessary to prepare various types of ridges according to the type of the soldering iron. As a result, the versatility is poor, and at the present time when diversification of soldering irons is required, commercialization and implementation are difficult.

  Moreover, in the structure of patent document 3, in order to drive a limit switch, it is necessary to open a shutter with the tip of a soldering iron. For this reason, there is a concern that the adhering matter also adheres to the shutter and the operability of the shutter is deteriorated. Further, since the tip needs to be pressed against the shutter, the tip may be easily damaged.

  The present invention has been made in view of the above-described problems, and has a high versatility in a configuration in which a rotating brush is employed and a motor for driving the rotating brush can be automatically driven when cleaning a soldering iron. It is an object of the present invention to provide a soldering iron tip cleaning device capable of automatically driving a motor without applying a load to the tip.

  In order to solve the above problems, the present invention provides a soldering iron tip cleaning device having a tip, wherein the casing and the casing are electrically insulated from each other, and the casing is electrically insulated. A conductive rotary brush that is rotatably held, a motor that drives the rotary brush, a power supply circuit that supplies power to the motor, and a voltage that is applied to the rotary brush by being electrically connected to the rotary brush, A detection line that is insulated on the ground side and connected to the feeder circuit, and the detection line is connected to the ground side of the tip by contacting the tip of the soldering iron with the rotating brush. A soldering iron tip cleaning device comprising switch means for closing the power feeding circuit of the motor when energized. In this aspect, the detection line is connected to the rotating brush. An inspection voltage is applied to the detection line. However, the detection line is insulated from the ground side, and the rotating brush is also supported in an electrically insulated state. Therefore, in a state where the rotating brush is not in contact with the tip and the insulating property of the rotating brush is maintained, the detection line is not energized even if a voltage is applied to the detection line. On the other hand, when the tip contacts the rotating brush, the grounding side of the tip and the detection line are conducted through the rotating brush. Therefore, an applied current flows through the detection line. Based on this applied current, the switch means closes the power feeding circuit. As described above, in this embodiment, the tip of the soldering iron is grounded, and when the tip contacts the rotating brush, the detection line is energized, and the switch means sets the power feeding circuit. close up. As a result, the soldering iron can be detected regardless of the length of the soldering iron, and the versatility of the tip cleaning device can be improved. Further, as in the past, the feeding circuit can be closed simply by bringing the tip into contact with the rotating brush. Therefore, the motor can be driven without applying a large load to the tip.

  In a preferred embodiment of the tip cleaning device, a detection circuit connected to the detection line for detecting the resistance value of the tip, and connected to the detection circuit, the detection result of the resistance value of the tip is notified. And a notification means for performing the operation. In this aspect, since the resistance value of the tip can be detected at the same time when the tip is cleaned and the result can be notified, the user can determine whether or not the tip needs to be replaced. .

  In a preferred embodiment of the tip cleaning device, the rotating brushes are arranged in pairs and include a connecting member that electrically connects the detection line to each rotating brush. In this aspect, cleaning can be performed more reliably by arranging two sets of rotating brushes in parallel. In addition, since each of the two pairs of rotating brushes is connected to the detection line by the connecting member, the reliability of the connection structure connecting the detection circuit and the rotating brush is increased.

  In a preferred embodiment of the tip cleaning device, each of the pair of rotating brushes further includes a pair of gears that mesh with each other, and the connecting member is a brake that moves the pair of gears in a direction of meshing with each other. It is a wire. In this aspect, since each rotating shaft is moved in the radial direction by the connecting member functioning as a brake wire, rattling due to backlash or dimensional tolerance of a pair of gears is absorbed during rotation, and each rotating shaft is Rotates smoothly. Therefore, noise and vibration during driving can be reduced. Moreover, since the above-mentioned shakiness can be absorbed, the dimensional tolerance of each part can be set relatively large. This eliminates the need for strict dimensional accuracy and facilitates manufacturing and assembly.

  In a preferred embodiment of the tip cleaning device, a mouth portion that forms an opening in the casing for allowing the rotating brush to face the soldering iron, and provided in the mouth portion along an outline of the mouth portion, And an insulating guide for guiding the tip to the rotating brush. In this aspect, the insulating guide can easily guide the tip to the rotating brush in a state in which the insulation between the soldering iron and the casing is ensured, and the operability is improved.

  In a preferred embodiment of the tip cleaning device, the switch is provided with an operation line that outputs an operation signal when the detection line and the ground side of the soldering iron are connected, and the operation signal A photocoupler having a light emitting element that emits light and a light receiving element that receives light from the light emitting element and outputs a signal; and the switch means is based on a signal output by the light receiving element of the photocoupler. The power feeding circuit is configured to be closed. In this aspect, since the detection circuit and the switch means can be configured based on a simple semiconductor element, the reliability of the apparatus can be increased at a relatively low cost.

  As described above, according to the present invention, the physical displacement of the switch means can be achieved by energizing the grounding side of the tip by utilizing that the tip of a general soldering iron is grounded. It is possible to detect the soldering iron without closing and close the power supply circuit, so that versatility can be improved and high reliability can be demonstrated without applying a load to the tip. Has a remarkable effect.

  Further features, objects, configurations, and advantages of the present invention will be readily understood from the following detailed description that should be read in conjunction with the accompanying drawings.

It is a perspective view of the tip cleaning device concerning one embodiment of the present invention. FIG. 2 is a schematic plan view in which the tip cleaning device, the soldering iron, and the main body device of FIG. 1 are arranged. It is sectional drawing of the tip cleaning apparatus of FIG. It is a disassembled perspective view which shows the principal part of the power transmission system of the tip cleaning apparatus of FIG. It is a disassembled perspective view which shows the principal part of the tip cleaning apparatus of FIG. It is a disassembled perspective view which shows the state which removed the mouse cap from the front box of the tip cleaning apparatus of FIG. It is a perspective view which shows the external appearance of the mouse cap of the tip cleaning apparatus of FIG. 1 from the back side. FIG. 2 is a wiring diagram of the tip cleaning device of FIG. 1. It is detail drawing which expands and shows the principal part of FIG.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  First, referring to FIGS. 1 to 3, a tip cleaning device 1 according to the present embodiment is configured to be used together with a main body device 3 of a soldering iron 2 and used at the same time. The soldering iron 2 has a conductive tip 21 that is electrically connected to the ground side. The tip cleaning device 1 is a device that mainly targets a soldering iron 2 made of a conductive material whose tip 21 is electrically grounded.

  The tip cleaning device 1 includes a casing 100. The casing 100 includes a lower casing 110 and an upper casing 111. Each of the casings 110 and 111 is a substantially rectangular cube in plan view that extends long in the front-rear direction. Each casing 110, 111 is configured in a box shape by combining sheet metal members.

  A pair of LEDs 101 and 102 and a toggle switch 103 are provided on the front surface of the lower casing 110. Of the pair of LEDs 101, 102, one LED 101 emits green light, and the other LED 102 forms a lamp emitting red light. These LEDs 101 and 102 are an example of an informing means for informing the detection result of the resistance value of the tip 21. The toggle switch 103 is used to switch the operation mode of the tip cleaning device 1 to either an automatic operation mode or a manual operation mode which will be described later. A power supply unit 104 is built in the rear part of the lower casing 110 (see FIG. 3). The power supply unit 104 includes a power cord 105 and is configured to be connected to a power outlet on the power supply side to be supplied with power. Further, the power supply unit 104 is provided with an outlet 106 (see FIG. 8), and the power cord 4 of the main device 3 is connected to the outlet 106 so that the main device 3 can be supplied with power. In addition, a base plate 107 and a transformer 108 are arranged and fixed in this order from the front on the bottom of the lower casing 110.

  The upper casing 111 includes a rear box 112 disposed on the rear end side in the front-rear direction, an inner box 113 disposed in front of the rear box, and a front box 114.

  Referring to FIG. 1 and FIGS. 3 to 5, the rear box 112 is a part that divides a machine room or the like for installing an optional device. Although not specifically shown, a known saddle holder for attaching the soldering iron 2 is attached to the side of the rear box 112.

  The inner box 113 has a partition plate 115 inside, and is partitioned into a rear motor chamber 116 and a front gear chamber 117 by the partition plate 115.

  A motor 119 is attached to the motor chamber 116 via a motor base 118. The rotating shaft 120 of the motor 119 passes through the partition plate 115 and extends into the front gear chamber 117.

  In the gear chamber 117, a drive gear 121 fixed to the rotating shaft 120 of the motor 119 is disposed. The drive gear 121 meshes with a first spur gear 122 disposed in the gear chamber 117. The first spur gear 122 meshes with a second spur gear 123 disposed on the side thereof. The spur gears 122 and 123 are arranged side by side on the front side of the partition plate 115 and mesh with each other. Therefore, when the motor 119 is driven, the drive gear 121 is driven in a predetermined direction (counterclockwise when viewed from the front). Therefore, the first spur gear 122 that meshes with the drive gear 121 rotates in the reverse direction (clockwise as viewed from the front), while the second spur gear 123 that meshes with the first spur gear 122 Will be driven in the same direction.

  Each of the spur gears 122 and 123 has a metal rotating shaft 124 concentrically. Each rotary shaft 124 is pivotally supported by the partition plate 115 in a state of being electrically insulated from the partition plate 115. Accordingly, the spur gears 122 and 123 are electrically insulated from the casing 100 (inner box 113). The rotating shaft 124 has a small-diameter portion 125 and a large-diameter connecting sleeve 128 that is continuous in front of the small-diameter portion 125 and is concentrically integrated. The small diameter portion 125 is press-fitted into the inner periphery of the boss portion of the spur gears 122 and 123. An annular gap S is formed between the boss portion and a rear end surface of a bearing 130 described later.

  A brake wire 126 that enters the annular gap S from below is disposed between the rotating shafts 124. Both ends of the brake wire 126 are insulated by a tube. In order to support both ends of the brake wire 126, truss bolts 127 that protrude forward from both outer sides of the respective flat gears 122 and 123 are attached to the partition plate 115 of the inner box 113. A spacer 140 is disposed on the outer periphery of the truss bolt 127. The truss bolt 127 protrudes forward from the partition plate 115 by a length defined by the total length of the spacer 140. Both end portions of the brake wire 126 (portions to which the tube is fixed) are placed on the spacer 140, and an intermediate portion of the brake wire 126 has a large diameter in front of both the rotating shafts 124 with an annular gap S. The connecting sleeve 128 is in pressure contact. As a result, the brake wire 126 urges the spur gears 122 and 123 upward via the connecting sleeve 128. When the brake wire 126 is assembled to each connecting sleeve 128 by this upward biasing force, both rotating shafts 124 continuous to the connecting sleeve 128 are attracted to each other, causing backlash between the flat gears 122 and 123 and rattling during assembly. Is absorbed. The brake wire 126 is an example of a connecting member that electrically connects a detection line 172 described later to each rotating brush.

  A bearing 130 is attached to the front end wall 129 of the inner box 113. The bearing 130 is made of an insulating material, and has a sleeve portion that receives the outer periphery of the connection sleeve 128 of the rotating shaft 124 and a flange portion that is integrally formed at the front end of the sleeve portion. The sleeve portion extends rearward from the front end wall 129 to the vicinity of the boss portion of the corresponding spur gear 122, 123, and supports the outer periphery of the connecting sleeve 128 while forming the annular gap S. The flange portion is in contact with the front surface of the front end wall 129. Further, a retaining ring (not shown) is fitted to the sleeve portion. The retaining ring is fixed to the back surface of the front end wall 129. The bearing 130 is firmly fixed to the front end wall 129 by sandwiching the front end wall 129 between the retaining ring and the flange portion. Thereby, the bearing 130 supports the connection sleeve 128 rotatably in a state where the movement of the connection sleeve 128 in the axial direction is restricted and the connection sleeve 128 is electrically insulated.

  The connecting sleeve 128 of the rotating shaft 124 passes through the front end wall 129 via the bearing 130 and protrudes forward of the front end wall 129. A set screw 131 is provided in front of the bearing 130 of the connecting sleeve 128. The set screw 131 is for fixing the rotary brush 132 attached to the inner periphery of the tip of the connecting sleeve 128.

  One rotating brush 132 is provided for each of the pair of connecting sleeves 128, and the rotating brushes 132 are arranged in a pair on the left and right. In another aspect, the rotating brushes 132 may be arranged one above the other. Each rotary brush 132 is embodied by a cylindrical brush body. Each brush body is fixed to the outer periphery of the shaft portion 133. Each of the rotating brush 132 and the shaft portion 133 is a conductive member formed of a metal having strong corrosion resistance.

  Further, in the illustrated example, the rotating brush 132 is set to have substantially the same diameter as the spur gears 122 and 123, and is configured to mesh with each other somewhat. Further, at the time of assembly, the rear end of the shaft portion 133 is inserted into the connecting sleeve 128 and connected to the corresponding rotating shaft 124 via the connecting sleeve 128. Thereby, the rotating brush 132 and the rotating shaft 124 are configured to be mechanically and electrically connected. In the present embodiment, the rotating shaft 124 and the shaft portion 133 connected to the rotating shaft 124 via the connecting sleeve 128 that is a part of the rotating shaft 124 mechanically connect the corresponding spur gears 122 and 123. A shaft body 134 connected to the electrically corresponding rotating brush 132 is formed.

  As shown in FIG. 5, a pair of side plates 135 is provided on the side of the inner box 113. Each side plate 135 shields the side portion of the inner box together with the top plate 136. A power switch 137 is attached to one side plate 135.

  Each side plate 135 has a guide portion 138 in which an upper portion of the front side portion is cut out. Each guide portion 138 extends from the front end wall 129 to the front end portion of the lower casing 110. Each guide portion 138 constitutes a guide member of the front box 114 described below in a state where each rotary brush 132 is opened in an upper portion.

  Referring to FIGS. 5 and 6, front box 114 is a box-shaped sheet metal member that is inserted back and forth along the inner surface of guide portion 138. The front box 114 includes a rectangular bottom plate 141 in plan view, a pair of side plates 142 extending on both sides of the bottom plate 141, a rear end plate 143 extending on the rear edge of the bottom plate 141, and a front end of the bottom plate 141. A front end plate 144 is provided integrally with the edge.

  A nut hole 145 is formed in the side plate 142 in the vicinity of the front lower portion. Insertion holes 139 are respectively formed in the front end portions of the guide portions 138, and the nut holes 145 face the insertion holes 139 when the front box 114 is stored between the guide portions 138. Then, the front box 114 is fixed to the guide portion 138 by screwing the decorative screw 146 into the nut hole 145 through the insertion hole 139. In the illustrated embodiment, a horizontally extending ridge 148 is provided on the upper edge of each side plate 142. The flange 148 extends in a predetermined length in the width direction, and opens an upper center portion of the front box 114 forward and backward. Therefore, when the front box 114 is attached between the guide portions 138, the gap between the flanges 148, 148 opens the opposing portions of the two sets of rotating brushes 132, 132.

  The rear end plate 143 is a structure that forms a tray 147 at the bottom of the front box 114 together with the bottom plate 141, the side plate 142, and the front end plate 144. The rear end plate 143 is set low so as to avoid interference with the rotating brush 132 when attached, and widely opens the rear portion of the front box 114.

  The front end plate 144 is a structure that extends substantially up to the top of the side plate 142 and covers the front portion of the front box 114. The upper portion of the front end plate 144 forms a mouse portion 149 that is recessed so that the center is curved downward. The mouse portion 149 communicates with the gap between the rods 148 and 148 and defines an opening 155 for inserting and removing the soldering iron 2 into the front box 114. The soldering iron 2 can face the rolling portion of each rotating brush 132 through the opening 155. A mouse cap 150 is attached to the mouse unit 149. The mouse cap 150 is an example of an insulating guide that guides the tip 21 to the rotating brush 132.

  Referring to FIGS. 5, 6, and 7, the mouse cap 150 is made of a heat-resistant resin having a high insulating property. The mouse cap 150 includes a front end portion 151 that is joined to the front surface of the front end plate 144, a back end portion 152 that is disposed at the rear portion of the front end portion and is joined to the back surface of the front end plate 144, and the front end portion 151 and the back end portion 152. It has integrally the connection part 153 which connects an upper edge. The upper edges of the front end portion 151 and the back end portion 152 are C-shaped curved members that follow the outline of the mouse portion 149, respectively. Further, the connecting portion 153 smoothly connects the front end portion 151 and the back end portion 152 along the contour. The cross section of the mouse cap 150 has a channel shape in which the front end portion 151, the connection portion 153, and the back end portion 152 are opened downward as a whole. The mouse cap 150 elastically fixes the cross-sectional shape along the outer edge of the mouse part 149 and covers the mouse part 149. A rib 154 is integrally provided on the upper portion of the connecting portion 153. The rib 154 is curved downward along the upper surface of the connecting portion 153.

  As shown in FIG. 1, the rib 154 of the mouse cap 150 is a guide member that supports and guides the lower portion of the soldering iron 2 when the soldering iron 2 is cleaned during assembly. The user performs the cleaning operation with the soldering iron 2 inserted between the rotating brushes 132 and 132 through the opening 155 defined by the mouse portion 149 together with the rod 148 and the tip 21 placed on the rib 154. be able to.

  As shown in FIG. 2, the soldering iron 2 has the iron tip 21 and a heater 22 accommodated in the iron tip 21. The tip 21 is connected to the ground line 24 of the main body device 3 through the ground line 23. The heater 22 is connected to the power supply line 31 of the main device 3.

  The main body device 3 includes a power supply unit 32 that supplies power to the heater 22 from the power supply line 31. The power supply unit 32 includes a power supply device and a control device (not shown). The power supply device has the power cord 4. The power cord 4 is connected to the outlet 106 of the tip cleaning device 1. The control device of the power supply unit 32 controls power supply from the power supply device.

  Next, the circuit configuration of the tip cleaning device 1 will be described with reference to FIGS. 8 and 9. Here, as shown in FIG. 8, the power supply of this embodiment is a single-phase three-wire wiring, and in the figure, the central wiring is a ground line among a set of three wirings.

  The power supply unit 104 is provided with a power supply line 160 connected to the power cord 105. The power supply line 160 is branched between the tip cleaning device 1 side and the soldering iron 2 side inside the power supply unit 104. The soldering iron 2 side of the power supply line 160 is connected to the outlet 106. A power supply cord 161 is connected to the tip cleaning device 1 side of the power supply line 160.

  The power supply cord 161 is connected to the primary side of the transformer 108. Feed lines 162 and 163 are branched on the upstream side of the transformer 108 of the feed cord 161. The power supply lines 162 and 163 are connected to the motor 119 and constitute the motor power supply circuit 164 together with the power supply unit 104 and the like. The motor power supply circuit 164 is an example of a power supply circuit that supplies power to the motor 119. One power supply line 162 is connected to the contact a of the toggle switch 103. The contact a is closed when the toggle switch 103 is switched to the manual operation mode. Therefore, when the toggle switch 103 is switched to the manual operation mode while the power switch 137 (see FIGS. 1 and 5) is connected, the motor 119 always rotates. Although omitted in FIG. 8, the power switch 137 may be provided on the power supply line 160 of the power supply unit 104 so that the power supply on the soldering iron 2 side is also turned ON / OFF. Thus, a configuration in which power is constantly supplied to the soldering iron 2 side may be employed.

  On the other hand, the secondary side of the transformer 108 is connected to the substrate 107. For example, a voltage of 9 V is applied to the substrate 107 from the secondary side of the transformer 108.

  The substrate 107 includes a plurality of electrical components. The substrate 107 is provided with a detection circuit 170 that detects the resistance value of the soldering iron 2 and a switch circuit 171. The switch circuit 171 includes power supply a contacts T1 and T2 (see FIG. 9). One power supply line 162 is connected to power supply a contacts T1 and T2 (see FIG. 9) of the substrate 107 in parallel with the contact a of the toggle switch 103. The switch circuit 171 has a switch function for turning on / off the primary side motor power supply circuit 164 based on the output of the secondary side detection circuit 170.

  Next, details of the circuits 170 and 171 will be described.

  First, a detection line 172 is connected to the detection circuit 170. The detection line 172 is electrically connected to the brake wire 126. A predetermined voltage (for example, a voltage of 25 mV) is applied to the detection line 172 of the detection circuit 170, but the brake wire 126 and the pair of rotating shafts 124 attracted to the brake wire 126 are supported by the bearing 130. Since it is electrically isolated, the circuit including this detection line 172 remains open. Therefore, when the insulation state is maintained, the applied current does not flow through the detection line 172. On the other hand, if the tip 21 of the soldering iron 2 comes into contact with the rotating brush 132, the detection line 172 is electrically connected to the tip 21 from the brake wire 126 through the rotating shaft 124 and the rotating brush 132. Then, it is connected to the ground line 23 of the tip 21. As a result, since an applied current flows through the detection line 172, the detection circuit 170 determines that the tip 21 of the soldering iron 2 is in contact with the applied current and grounds from the tip 21. The resistance value reaching the line 23 can be detected.

  The detection circuit 170 includes an operation line 174. The detection circuit 170 is configured to output an output signal to the switch circuit 171 when a current flows through the detection line 172. Here, in the present embodiment, when the current flowing through the detection line 172 and the resistance value detected by the detection circuit 170 is equal to or less than a preset drive resistance value (for example, 70Ω), the operation line 174 is set. Is configured to output an output signal. The configuration using the drive resistance value can function as a safety measure. For example, even if something (for example, a user's finger) accidentally contacts the rotating brush 132 and an applied current flows through the detection line 172, the resistance value is out of the expected range of the soldering iron 2. In this case, no current flows through the operation line 174, and the motor 119 is not driven. For example, since the human skin resistance is 5000Ω, even if a person accidentally touches the rotating brush 132, the rotating brush 132 remains stopped, and safety is ensured. Further, since the applied voltage is low, there is no possibility of affecting the human body.

  The detection circuit 170 turns on only one LED 101 when the resistance value of the soldering iron 2 is less than a preset setting value (for example, 2 ohms), and when the resistance value is equal to or more than the above setting value. Only the other LED 102 is lit. When the resistance value is low (when the LED 101 is lit), unnecessary charges such as leakage current and static electricity from the heater 22 flow from the tip 21 through the ground line 23 to the ground terminal of the AC outlet. You can avoid adverse effects on. On the other hand, when the resistance value is high (when the LED 102 is lit), the tip 21 becomes old, the resistance between the tip 21 and the ground increases, and unnecessary charges are sufficiently released to the ground. Indicates that it cannot be done. The user determines the suitability of the tip 21 based on the notification of the LEDs 101 and 102, and replaces it with a new one as necessary.

  As shown in FIG. 9, the switch circuit 171 is an example of a switch unit that closes the motor power supply circuit 164 when the detection line 172 is connected to the ground side of the tip 21 and energized. The switch circuit 171 includes electronic components including a photocoupler 175 and a bidirectional thyristor (triac) 176.

  The photocoupler 175 includes a light emitting element 177 and a light receiving element 178. An operation line 174 of the detection circuit 170 is connected to the light emitting element 177. When a current flows through the operation line 174, the light emitting element 177 emits light and the light receiving element 178 is driven. The light receiving element 178 of the photocoupler 175 is connected to the bidirectional thyristor 176.

  In the illustrated example, the bidirectional thyristor 176 is connected to the power feeding a contacts T 1 and T 2 of the switch circuit 171. When a signal is output from the light receiving element 178, the bidirectional thyristor 176 connects the power supply a contacts T1 and T2. Therefore, the feeder line 162 is conducted. As a result, in this embodiment, when the power switch 137 is turned on and the toggle switch 103 is switched to the automatic operation mode, the soldering iron tip 2 contacts the rotating brush 132 or 132. At the time, the motor 119 is automatically supplied with power and operates to rotate the rotating brushes 132 and 132. The bidirectional thyristor 176 is not an essential element. For example, when a direct current can be used, it may be omitted. In that case, the light receiving element 178 of the photocoupler 175 may be directly connected to the power feeding a contacts T1 and T2, and the photocoupler 175 may constitute a switch circuit (switch means).

  In the configuration as described above, the tip cleaning device 1 and the main body device 3 of the soldering iron 2 are arranged at appropriate positions on the work table, and the power cord 4 of the main body device 3 is connected to the outlet 106 of the tip cleaning device 1. Connect them so that they can be fed.

  The main body device 3 heats the heater 22 of the soldering iron 2 under the control of the power supply unit 32. As a result, the tip 21 is heated, and the soldering operation can be performed by melting the solder. The user grips the soldering iron 2 and performs a soldering operation while supplying solder to the tip 21.

  By repeating the soldering operation, surplus solder, flux or the like adheres to the soldering iron 2 and the wettability of the tip 21 changes. Therefore, the user cleans the tip 21 with the tip cleaning device 1 as appropriate. In this cleaning operation, the tip 21 is moved to the front box 114 of the tip cleaning device 1 and inserted into the rotary brush 132 from between the flanges 148 and 148.

  Prior to this cleaning operation, the user can switch the operation mode of the tip cleaning device 1 between the automatic operation mode and the manual operation mode by operating the toggle switch 103.

  When the user switches the toggle switch 103 to the manual operation mode, one motor power supply circuit 164 is closed, so that the motor 119 is always rotated. Therefore, even when a soldering iron having a ceramic iron tip is used, the iron tip cleaning operation can be performed.

  On the other hand, when the toggle switch 103 is set to the automatic operation mode and the rotating brush 132 is not in contact with the tip and the insulating property of the rotating brush 132 is maintained, the toggle switch 103 is toggled. Since both the contacts a of the switch 103 and the switch circuit 171 are open, no electric power is supplied to the motor 119, and the rotating brush 132 remains stopped. Further, a predetermined voltage is applied to the detection line 172, but the brake wire 126 and the pair of rotating shafts 124 attracted to the brake wire 126 are electrically insulated by the bearing 130. The circuit including the detection line 172 remains open.

  In the automatic operation mode, when the tip 21 comes into contact with the wire body of the rotating brush 132, the detection line 172 is electrically connected to the tip 21 from the brake wire 126 through the rotating shaft 124 and the rotating brush 132, It is connected to the ground line 23 of the tip 21. As a result, an applied current flows through the detection line 172, and the detection circuit 170 can detect the resistance value of the soldering iron 2. When the resistance value of the soldering iron 2 is less than the set value, the detection circuit 170 lights one LED 101. When the resistance value of the soldering iron 2 is equal to or higher than the set value, the detection circuit 170 lights the other LED 102.

  In parallel with the output to the LED 101 or the LED 102, the detection circuit 170 determines whether or not the detected resistance value is equal to or less than the drive resistance value (for example, 70Ω). When the resistance value exceeds the drive resistance value, the detection circuit 170 does not drive the operation line 174. For this reason, the motor 119 is also stopped. On the other hand, when the resistance value is equal to or less than the drive resistance value, the detection circuit 170 energizes the operation line 174 and emits the light emitting element 177 of the photocoupler 175 provided in the switch circuit 171. As a result, the light receiving element 178 of the photocoupler 175 closes the power feeding a contacts T1 and T2. As a result, the primary side motor power supply circuit 164 is closed and power is supplied to the motor 119. When the motor 119 is supplied with power, torque is transmitted from the drive gear 121 to the first spur gear 122 and the second spur gear 123 in this order, and the spur gears 122 and 123 and the spur gears 122 and 123 are connected. The rotating brush 132 rotates in the opposite directions via the connecting sleeve 128 of the rotating shaft 124. As a result, when the soldering iron 2 comes into contact with the rotating brush 132, the rotating brush 132 rotates and the deposits are removed.

  While the rotary brush 132 is rotating, the user places the soldering iron 2 on the mouse cap 150 of the front box 114, and removes deposits while rotating the soldering iron 2 around its axis as appropriate. be able to. The removed deposit is collected in the tray 147 of the front box 114. When the deposits are sufficiently removed, the user pulls out the soldering iron 2 from the front box 114 and performs the soldering operation again or ends the soldering operation by turning off the power.

  When the tip 21 of the soldering iron 2 is separated from the rotating brush 132, the circuit including the detection line 172 is opened, and the energization of the detection line 172 is stopped. As a result, the detection circuit 170 stops energizing the operation line 174. For this reason, the light emitting element 177 of the photocoupler 175 provided in the switch circuit 171 stops, and the light receiving element 178 also stops output. As a result, the bidirectional thyristor 176 of the switch circuit 171 opens the power supply a contacts T1 and T2. Therefore, the motor power supply circuit 164 is opened and power supply is stopped. Therefore, the motor 119 stops and the rotating brush 132 also stops.

  The adhering matter collected on the tray 147 of the front box 114 in the cleaning operation is removed by removing the front box 114 as appropriate.

  As described above, according to the present embodiment, the detection line 172 to which an inspection voltage (for example, 25 mV) is applied is provided, and the detection line 172 is connected to the rotating brush 132. Here, the detection line 172 is insulated from the ground side, and the rotating brush 132 is also supported in an electrically insulated state. Therefore, when the rotating brush 132 is not simply in contact with the tip 21 and the insulating property of the rotating brush is maintained, the detection line 172 is not energized even if a voltage is applied to the detection line 172. Absent. Therefore, the motor 119 is stopped and the rotating brush 132 remains stopped. On the other hand, when the tip 21 comes into contact with the rotating brush 132, the grounding line 23 of the tip 21 and the grounding line 24 of the main unit 3 are electrically connected to the detection line 172 through the rotating brush 132. For this reason, an applied current flows through the detection line 172. With this applied current, the switch circuit 171 closes the motor power supply circuit 164. Thus, in the present embodiment, utilizing the fact that the tip 21 of the soldering iron 2 is grounded, when the tip 21 contacts the rotating brush 132, the detection line 172 is energized, The switch circuit 171 closes the motor power supply circuit 164. As a result, regardless of the length of the soldering iron 2, the soldering iron 2 can be detected. Therefore, the versatility of the tip cleaning device 1 can be improved. Further, the motor power supply circuit 164 can be closed simply by bringing the tip 21 into contact with the rotating brush 132 as is conventional. Therefore, the motor 119 can be driven without applying a large load to the tip 21. Further, since the casing 100 is made of metal, durability is improved, and maintenance properties such as treatment of deposits are also improved.

  Further, in the present embodiment, a detection circuit 170 that is connected to the detection line 172 and detects the resistance value of the tip 21 and a notification that is connected to the detection circuit 170 and notifies the detection result of the resistance value of the tip 21. LEDs 101 and 102 as means are further provided. Specifically, a pair of lamps (LED 101, LED 102) are provided, and when the resistance value of the tip 21 of the soldering iron 2 is less than a predetermined value (for example, 2Ω), only one lamp (LED 101) is present. Illuminates to notify that the tip 21 has a suitable resistance value. In addition, when the resistance value of the tip is equal to or more than the predetermined value, only the other lamp (LED 102) is turned on to notify that the tip 21 is out of date. For this reason, in this embodiment, since the resistance value of the tip 21 can be detected at the same time when the tip 21 is cleaned and the result can be notified, the user determines whether or not the tip 21 needs to be replaced. It becomes possible to do. In addition, as an alerting | reporting means, it replaces with LED etc. and a liquid crystal panel is employ | adopted and you may comprise so that the detected resistance value can be displayed.

  In the present embodiment, the rotating brushes 132 are juxtaposed in pairs and include a brake wire 126 that electrically connects the detection line 172 to each rotating brush 132. For this reason, in this embodiment, the cleaning can be executed more reliably by providing two pairs of rotating brushes 132. Further, since the detection line 172 and the rotating brush 132 are connected by the brake wire 126, the reliability of connecting the detecting circuit 170 and the rotating brush 132 is increased.

  In the present embodiment, each of the two pairs of rotating brushes 132 is further provided with a pair of gears 122 and 123 meshing with each other, and the brake wire 126 is in a direction of meshing the pair of gears 122 and 123 with each other. Play the function. For this reason, in the present embodiment, each rotating shaft 124 is moved in the radial direction by the brake wire 126, so that rattling due to backlash, dimensional tolerance, etc. of the pair of gears is absorbed during rotation, and each rotating shaft 124 is Rotate smoothly. Therefore, noise and vibration during driving can be reduced. Moreover, since the above-mentioned shakiness can be absorbed, the dimensional tolerance of each part can be set relatively large. This eliminates the need for strict dimensional accuracy and facilitates manufacturing and assembly.

  Further, in the present embodiment, a mouth portion 149 that forms an opening in the casing 100 that allows the rotary brush 132 to face the soldering iron 2 is provided in the mouse portion 149 along the outline of the mouse portion 149. A mouse cap 150 for guiding the rotating brush 132 is further provided. For this reason, in this embodiment, it becomes easy to guide the tip 21 to the rotating brush 132 in a state in which the insulation between the soldering iron 2 and the casing 100 is secured by the mouse cap 150, and the operability is improved. In particular, since the rib 154 is provided on the mouse cap 150, positioning becomes easy and operability is improved.

  In the present embodiment, when the detection line 172 and the ground side of the soldering iron 2 are connected, the operation line 174 that outputs an operation signal and the light emission that is emitted by the operation signal are provided in the switch circuit 171. The photocoupler 175 further includes an element 177 and a light receiving element 178 that receives light from the light emitting element 177 and outputs a signal, and the switch circuit 171 is based on a signal output from the light receiving element 178 of the photocoupler 175. The motor power supply circuit 164 is configured to be closed. For this reason, in this embodiment, since the detection circuit 170 and the switch circuit 171 can be configured based on a simple semiconductor element, the reliability of the apparatus can be increased at a relatively low cost.

  The present invention is not limited to the embodiment described above, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Tip cleaning device 2 Soldering iron 100 Casing 104 Power supply unit (One example of a power supply circuit)
114 Front box 119 Motor 121 Drive gear 122 First spur gear 123 Second spur gear 126 Brake wire (an example of a connecting member)
132 Rotating brush 149 Mouse part 150 Mouse cap (an example of an insulating guide)
155 Opening 164 Motor feeding circuit (one element example of feeding circuit)
170 Detection circuit 171 Switch circuit 172 Detection line 174 Operation line

Claims (6)

A soldering iron tip cleaning device having a tip,
A casing,
An electrically conductive rotating brush that is electrically insulated from the casing and is rotatably held by the casing;
A motor for driving the rotating brush;
A power supply circuit for supplying power to the motor;
A detection line that is electrically connected to the rotating brush and applies a voltage to the rotating brush, and the ground side is insulated;
The power supply circuit of the motor is connected to the power supply circuit, and when the tip of the soldering iron is in contact with the rotating brush, the detection line is connected to the ground side of the tip and is energized. A soldering iron tip cleaning device, comprising: a switch means for closing the soldering iron. In the soldering iron tip cleaning apparatus according to claim 1,
A detection circuit connected to the detection line and detecting a resistance value of the tip;
A soldering iron tip cleaning device, further comprising: an informing means connected to the detection circuit and informing a detection result of the resistance value of the tip. In the soldering iron tip cleaning device according to claim 1 or 2,
The rotating brushes are juxtaposed in pairs,
A soldering iron tip cleaning device comprising: a connecting member that electrically connects the detection line to each rotating brush. In the soldering iron tip cleaning apparatus according to claim 3,
Each of the two sets of rotating brushes further includes a pair of gears that mesh with each other,
The soldering iron tip cleaning device, wherein the connecting member is a brake wire that brings the pair of gears toward each other in a meshing direction. The soldering iron tip cleaning apparatus according to any one of claims 1 to 4,
A mouth portion for forming an opening in the casing for allowing the rotating brush to face the soldering iron;
A soldering iron tip cleaning device, further comprising: an insulating guide provided on the mouse portion along an outline of the mouse portion and guiding the tip to the rotating brush. The soldering iron tip cleaning apparatus according to any one of claims 1 to 5,
An operation line for outputting an operation signal when the detection line and the ground side of the soldering iron are connected;
A photocoupler provided in the switch means, which emits light in response to the operation signal; and a photocoupler that receives light from the light emitting element and outputs a signal; and the switch means includes the photocoupler. A soldering iron tip cleaning device, wherein the power feeding circuit is closed based on a signal output from the light receiving element.

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