ceramic electric soldering iron

Abstract

This application relates to the technical field of heating devices and discloses a ceramic electric soldering iron. The ceramic electric soldering iron includes a soldering tip, a handle, a ceramic heating element, a positive conductor, a negative conductor, and further includes a conductor and a ground conductor, the negative conductor being connected to the soldering tip, the positive conductor being connected to the ceramic heating element, the conductor being connected to the negative conductor at the tip of the ceramic heating element, the conductor being connected to a control and measurement unit (configured to be able to measure ground voltage and ground resistance), and the ground conductor being connected to the handle. The ceramic electric soldering iron is advantageous in detecting whether the ground voltage is less than 2mV and the ground electrical resistance is less than 2Ω.

Description

[Technical Field]

[0001] The present invention relates to the technical field of heat generating devices, and more particularly to ceramic electric soldering irons. [Background technology]

[0002] Currently, electric soldering irons are an essential tool for joining components and conductors in the home appliance and electronic device manufacturing industries. When used, electrostatic discharge (ESD) occurs due to charge transfer caused by close proximity or direct contact between objects with different electrostatic potentials. ESD can damage the internal components of the soldering iron and shorten its service life. China is a manufacturing base for electronic products, with many electronic equipment manufacturers throughout the country. However, many of these manufacturers' ESD suppression efforts do not comply with the US standard ESD20.20, which specifies a ground voltage of less than 2mV and a ground resistance of less than 2Ω.

[0003] In the prior art, static electricity is prevented by directly connecting the housing to a grounding conductor or by using a ceramic heating element. For example, patent application number CN 200520065808.4 discloses an AC / DC power-saving, static-free, thermostatic silicon nitride electric soldering iron. The electric soldering iron is composed of a heating core, a welding tip, a stainless steel sleeve, an insulating ceramic tube, a beveled insulating ceramic tube, and a handle. The heating core uses silicon nitride heating elements with different rated powers. The heating core is cylindrical, its front end is inserted into the welding tip, and its rear end is equipped with two extraction electrodes to provide static electricity protection for the heating element. However, this does not ensure that the ground voltage is less than 2mV or the ground electrical resistance is less than 2Ω. Summary of the Invention

[0004] The object of the present invention is to provide a ceramic electric soldering iron and detect whether the ground voltage of ESD is less than 2 mV and the ground electrical resistance is less than 2 Ω.

[0005] In order to achieve the above object, the present invention employs the following techniques.

[0006] The ceramic electric soldering iron comprises a soldering iron tip, a handle, a ceramic heating element, a positive conductor, a negative conductor, and further comprises a conductor and a ground conductor, wherein the negative conductor is connected to the soldering iron tip, the positive conductor is connected to the ceramic heating element, the conductor is connected to the negative conductor at the tip of the ceramic heating element, the conductors are connected to a control and measurement unit (configured to be able to measure ground voltage and ground resistance), and the ground conductor is connected to the handle.

[0007] To facilitate the extraction of the conductor and stable current transmission, the conductor is connected to the negative conductor at the tip of the ceramic heating element by a first crown spring, and the closer the connection point is to the soldering iron tip, the smaller the ground voltage and ground resistance.

[0008] In order to facilitate the extraction of the negative electrode conductor and stable current transmission, a second crown spring is connected to the center of the ceramic heating element, and the negative electrode conductor is extracted by the second crown spring, and the negative electrode conductor is used for both power supply and temperature measurement output.

[0009] To facilitate the extraction of the positive electrode wire and stable current transmission, a third crown spring is connected to the rear end of the ceramic heating element, and the positive electrode wire is extracted by the third crown spring, allowing the positive electrode wire to be used for both power supply and temperature measurement.

[0010] In order to remove static electricity without interfering with the work of the operator holding the soldering iron in his hand, the rear end of the handle is connected to the ground conductor.

[0011] To facilitate real-time temperature measurement, the positive and negative leads are made of thermocouple material, and the positive and negative leads are pulled out from the handle and connected to a control unit.

[0012] Due to the temperature control response speed and service life of the ceramic heating element, the ceramic heating element is a silicon nitride all-ceramic heating element.

[0013] Benefits: The ceramic electric soldering iron of the present invention features a three-pole handle structure, achieving the combined benefits of conductive heating, temperature control, static electricity removal, and ESD compliance. The lead wire is connected to the soldering iron tip, and the control and measurement unit detects whether the ESD standard requirements of a ground voltage of less than 2 mV and a ground resistance of less than 2 Ω are met. The lead wire is then pulled out and grounded at the rear end of the handle, allowing for static electricity removal and handle status detection, enabling automatic sleep and other actions to efficiently prevent damage to components. The tip conducts heat to the soldering iron, providing fast temperature rise and high temperature control precision. The silicon carbide ceramic heating element, due to its size, enables finer processing, enabling high-precision soldering of electronic components that was previously impossible with conventional electric soldering irons. The iron is also low cost, offers precise temperature control, fast temperature return, and a long service life. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic diagram of a ceramic electric soldering iron according to one embodiment. Reference numerals: 1: soldering iron tip, 2: handle, 3: ceramic heating element, 4: positive electrode conductor, 5: negative electrode conductor, 6: conductor, 7: ground conductor, 8: first crown spring, 9: second crown spring, 10: third crown spring DETAILED DESCRIPTION OF THE INVENTION

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the following description of the embodiments is only provided to help understand the principles and main concepts of the present invention, and is not intended to limit the scope of the invention. For those skilled in the art, any improvements made without departing from the principles of the present invention are within the scope of the invention.

[0016] Embodiment As shown in Figure 1, the ceramic electric soldering iron comprises a soldering iron tip 1, a handle 2, a ceramic heating element 3, a positive lead wire 4, a negative lead wire 5, a lead wire 6, and a ground lead wire 7. The tip of the ceramic electric soldering iron 3 is connected to the soldering iron tip 1. The handle 2 covers the ceramic heating element 3 and the soldering iron tip 1. The soldering iron tip 1 is drawn out from the tip of the handle 2. The negative lead wire 5 is connected to the soldering iron tip 1 and drawn out from the middle of the ceramic heating element 3. The negative lead wire 5 and the positive lead wire 4 form a circuit inside the ceramic heating element 3 to heat the ceramic heating element 3. At the tip of the ceramic heating element 3, a lead wire 6 is drawn out from the negative lead wire 5. The lead wire 6 is connected to a control measurement unit that measures the ground voltage and ground resistance. The closer the connection point is to the soldering iron tip 1, the lower the induced voltage and the smaller the ground voltage and ground resistance. The measured values meet the ESD standard of a ground voltage of less than 2mV and a ground resistance of less than 2Ω. The lead wire 6 is connected to the negative lead wire 5 at the tip of the ceramic heating element 3, and the ground lead wire 7 is connected to the handle 2.

[0017] The conductor 6 is connected to the negative conductor 5 at the tip of the ceramic heating element 3 by the first crown spring 8, allowing a relatively large current to be transmitted, ensuring stable connection and stable current transmission.

[0018] A second crown spring 9 is connected to the center of the ceramic heating element 3, and the negative electrode conductor 5 is drawn out by the second crown spring 9, and the negative electrode conductor 5 is used for both power supply and temperature measurement output.

[0019] A third crown spring 10 is connected to the rear end of the ceramic heating element 3, and the positive electrode conductor 4 is drawn out from the third crown spring 10, and the positive electrode conductor 4 is used for both power supply and temperature measurement.

[0020] The rear end of the handle 2 is connected to a grounding conductor 7 for grounding and to remove static electricity.

[0021] Thermocouple material is used for the positive electrode conductor 4 and the negative electrode conductor 5. Thermocouple material uses the temperature difference reaction electromotive force generated between different materials, and measures temperature by utilizing the property that the thermoelectromotive force of the material changes depending on the temperature difference.

[0022] The ceramic heating element 3 is a silicon nitride all-ceramic heating element, and is smaller in size than conventional heating elements, thereby improving the temperature control response speed and the service life of the ceramic heating element 3.

Claims

1. A ceramic electric soldering iron comprising a soldering iron tip (1), a handle (2), a ceramic heating element (3), a positive electrode lead (4), and a negative electrode lead (5), The device further includes a lead wire (6) drawn from the negative lead wire (5) at the tip of the ceramic heating element (3) and a ground lead wire (7) connected to the rear end of the handle (2), The ceramic electric soldering iron is characterized in that the positive electrode conductor (4) and the negative electrode conductor (5) form a circuit within the ceramic heating element (3), the conductor (6) is connected to a control measuring unit that measures the ground voltage and ground resistance near the soldering iron tip (1), and the ground conductor (7) is grounded.

2. 2. The ceramic electric soldering iron according to claim 1, wherein the lead wire (6) is connected to the negative lead wire (5) at the tip of the ceramic heating element (3) by a first crown spring (8).

3. 3. The ceramic electric soldering iron according to claim 1, wherein a second crown spring (9) is connected to the center of the ceramic heating element (3), and the negative electrode conductor (5) is pulled out by the second crown spring (9).

4. 4. The ceramic electric soldering iron according to claim 3, wherein a third crown spring (10) is connected to the rear end of the ceramic heating element (3), and the positive electrode conductor (4) is pulled out by the third crown spring (10).

5. 5. The ceramic electric soldering iron according to claim 4, wherein the conductor (6) is connected to the ground conductor (7) at the rear end of the handle (2).

6. 6. The ceramic electric soldering iron according to claim 5, wherein the positive and negative conductors (4, 5) are made of thermocouple material.

7. 7. The ceramic electric soldering iron according to claim 6, wherein the ceramic heating element (3) is a silicon nitride ceramic heating element.

Images