A bit and an electric iron

Abstract

The application discloses a bit and an electric soldering iron. The bit comprises a body, a temperature sensor and a heat-conducting filler. The body has a front end and a rear end. An installation hole is arranged in the body from the rear end to the front end. The installation hole extends to a heat-conducting end inside the front end. The temperature sensor has a temperature measuring end. The temperature sensor is installed in the installation hole and the temperature measuring end contacts the heat-conducting end. The heat-conducting filler is filled in the gap between the temperature measuring end and the heat-conducting end. The temperature sensor is installed in the installation hole of the body to form an integrated bit. The heat-conducting filler is filled in the cavity between the gap between the temperature measuring end and the heat-conducting end. The contact mode of the surface contact is formed between the temperature measuring end and the heat-conducting end. The contact area is increased. The heat conduction efficiency is improved. The detection efficiency of the temperature sensor is improved.

Description

Technical Field

[0001] This application relates to the field of soldering iron technology, specifically to a soldering iron tip and a soldering iron. Background Technology

[0002] Soldering irons, as common soldering tools, are typically used in the electronics field to solder electronic components or remove solder from already soldered components. During soldering, the temperature of the soldering iron tip is critical; excessively high or low temperatures can easily lead to problems such as cold solder joints or poor soldering, thus reducing the reliability of the electronic component soldering. Therefore, a temperature sensor is usually installed inside the soldering iron tip to monitor its temperature.

[0003] However, the contact between the temperature sensor and the soldering iron tip is a point contact, with a small heat conduction area and high thermal resistance. The temperature sensor cannot quickly detect the temperature change of the soldering iron tip, resulting in a lag in temperature sensing speed and affecting the soldering operation. Utility Model Content

[0004] This application aims to provide a soldering tip and a soldering iron, so that a heat conduction method is formed between the temperature sensor and the soldering tip to form a surface contact, so that the temperature of the soldering tip can be quickly transferred to the temperature sensor, thereby improving the temperature detection efficiency of the soldering tip.

[0005] According to a first aspect of this application, this application provides a soldering iron tip, comprising:

[0006] The body has a front end and a rear end. The body has a mounting hole inside it from the rear end to the front end. The end of the mounting hole extending into the front end is a heat-conducting end.

[0007] A temperature sensor having a temperature measuring end is installed in the mounting hole and the temperature measuring end is in contact with the heat-conducting end.

[0008] A thermally conductive filler is provided to fill the gap between the temperature measuring end and the thermally conductive end.

[0009] In one embodiment, the temperature sensor includes a temperature sensing element and a conductive sleeve. The conductive sleeve is installed in the mounting hole, and the temperature measuring end is formed at one end of the conductive sleeve facing the heat-conducting end. The temperature sensing element is installed inside the conductive sleeve and connected to the temperature measuring end.

[0010] In one embodiment, the temperature detection element includes a temperature sensing element, and the temperature sensor further includes an insulating sleeve assembly, the temperature detection element passing through the insulating sleeve assembly, and the insulating sleeve assembly passing through the conductive sleeve.

[0011] In one embodiment, the temperature sensor further includes a temperature measuring circuit, which is electrically connected to the temperature sensing element.

[0012] In one embodiment, the temperature sensor further includes a support sleeve that passes through the insulating sleeve assembly and at least a portion of the support sleeve extends to the outside of the insulating sleeve assembly, and the temperature sensing element passes through the support sleeve and at least a portion of the temperature sensing element extends to the outside of the support sleeve.

[0013] In one embodiment, the insulating sleeve assembly includes at least two insulating sleeves connected in series, and the temperature sensing element is disposed in at least two of the insulating sleeves.

[0014] In one embodiment, along the direction from the front end to the rear end of the body, the length of the mounting hole, the length of the conductive sleeve, and the length of the temperature sensing element increase sequentially.

[0015] In one embodiment, the shape of the heat-conducting end is adapted to the shape of the temperature-sensing end.

[0016] In one embodiment, the thermally conductive filler is a thermally conductive adhesive that fills the gap between the thermally conductive end and the temperature measuring end.

[0017] According to a second aspect of this application, this application provides an electric soldering iron, including the aforementioned soldering tip.

[0018] According to the soldering tip and soldering iron of the above embodiment, the temperature sensor is installed in the mounting hole of the body to form an integrated soldering tip, and the thermally conductive filler is filled in the cavity between the temperature measuring end and the thermally conductive end, so that the temperature measuring end and the thermally conductive end form a surface contact, thereby increasing the contact area, improving the heat conduction efficiency, and thus improving the detection efficiency of the temperature sensor. Attached Figure Description

[0019] Figure 1 Exploded view of the soldering iron tip provided in this application;

[0020] Figure 2 An assembly diagram of the soldering iron tip provided in this application;

[0021] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0022] Figure 4 A schematic diagram of the assembly of the soldering iron tip provided in this application in another embodiment.

[0023] Figure label:

[0024] Soldering tip 100, body 10, front end 11, rear end 12, mounting hole 13, heat-conducting end 131, cavity 14, temperature sensor 20, temperature detection element 21, conductive sleeve 22, temperature measuring end 221, insulating sleeve group 23, insulating sleeve 23, support sleeve 24, thermally conductive filler 30. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0026] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0027] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0028] In related technologies, soldering irons, as commonly used welding tools in the electronics field, have evolved from the initial structure of a heating wire and soldering tip to various temperature-controlled intelligent soldering irons. With the miniaturization of components and the use of new application scenarios such as new energy sources, higher requirements are placed on welding tools, such as smaller soldering tips, faster temperature recovery, and lower consumable costs.

[0029] To meet these requirements, excellent thermal conductive materials and more sensitive temperature detection are needed. Currently, the selection of thermal conductive materials has reached the optimal level, usually choosing copper, which has better thermal conductivity and higher cost performance. As for temperature detection, the temperature sensor is usually inserted into the inside of the soldering iron tip from the tail end, and the temperature sensor is placed as close as possible to the front end of the soldering iron tip to obtain higher sensing sensitivity.

[0030] However, the contact between the temperature sensor and the tip of the soldering iron is a point contact, resulting in a small heat conduction area and a large thermal resistance. The temperature of the soldering iron tip cannot be quickly transferred to the temperature sensor, which further leads to a lag in temperature sensing.

[0031] To address the aforementioned issues, this application provides a soldering tip and a soldering iron. A thermally conductive filler is placed between the temperature sensing end of the temperature sensor and the thermally conductive end of the mounting hole inside the soldering tip, thereby creating a surface contact thermal conductivity between the temperature sensor and the soldering tip. This allows the temperature of the soldering tip to be rapidly transferred to the temperature sensor, improving the temperature detection efficiency of the soldering tip.

[0032] Example 1

[0033] See Figures 1-4 As shown, the soldering iron tip 100 provided in this embodiment includes a body 10, a temperature sensor 20, and a thermally conductive filler 30.

[0034] The body 10 is a soldering iron tip that can be heated to perform soldering or remove solder from the iron. The body 10 is usually made of a material with high thermal conductivity, such as copper or copper alloys. The outer surface of the body 10 usually has an iron plating layer. The body 10 is heated by electromagnetic induction. When the body 10 is inserted into an electromagnetic induction coil, the electromagnetic induction coil generates an alternating magnetic field through a high-frequency alternating current of 380KHz. The iron plating layer generates an induced current in the alternating magnetic field, forming eddy current losses, which heats up the soldering iron tip.

[0035] The main body 10 has a front end 11 and a rear end 12. The front end 11 and the rear end 12 are set according to the distance between the main body 10 and the user when it is used as part of the soldering iron. The front end 11 is farther away from the user than the rear end 12. When in use, the front end 11 can be used to solder or remove solder that has been soldered, while the rear end 12 can be used to connect to the handle of the soldering iron.

[0036] In this embodiment, the body 10 is also provided with a mounting hole 13. The mounting hole 13 is disposed inside the body 10 from the rear end 12 to the front end 11. The end of the mounting hole 13 extending into the front end 11 is a heat-conducting end 131. The heat-conducting end 131 is relatively closer to the front end 11. Since the front end 11 is used for soldering or removing soldered solder, the front end 11 performs the function of soldering. The heat-conducting end 131 is used to contact the temperature sensor 20 so that the temperature sensor 20 can detect the temperature, thereby realizing the function of detecting the temperature of the soldering iron tip 100.

[0037] The temperature sensor 20 has a temperature measuring end 221. The temperature sensor 20 is installed in the mounting hole 13 and the temperature measuring end 221 is in contact with the heat-conducting end 131. The heat-conducting end 131 can conduct the temperature of the body 10 to the temperature measuring end 221 so that the temperature can be detected by the temperature sensor 20.

[0038] The mounting hole 13 is formed inside the body 10 by drilling. The mounting hole 13 is a blind hole, and the heat-conducting end 131 of the mounting hole 13 is formed into a conical or near-conical shape. Therefore, a cavity 14 is generated between the temperature measuring end 221 and the heat-conducting end 131. The cavity 14 forms a gap between the temperature measuring end 221 and the heat-conducting end 131, which further makes the temperature measuring end 221 and the heat-conducting end 131 form a point contact. The contact area is relatively small, and the heat conduction efficiency is relatively low, which further reduces the detection efficiency of the temperature sensor 20.

[0039] In this application, the thermally conductive filler 30 is filled into the cavity 14 between the temperature measuring end 221 and the thermally conductive end 131, so that the temperature measuring end 221 and the thermally conductive end 131 form a surface contact, thereby increasing the contact area, improving the heat conduction efficiency, and thus improving the detection efficiency of the temperature sensor 20.

[0040] See Figures 1-4 As shown, the temperature sensor 20 includes a temperature sensing element 21 and a conductive sleeve 22. The conductive sleeve 22 is installed in the mounting hole 13. The temperature measuring end 221 is formed at one end of the conductive sleeve 22 facing the heat-conducting end 131. The temperature sensing element 21 is installed inside the conductive sleeve 22 and is connected to the temperature measuring end 221.

[0041] In this application, the temperature sensor 20 can be, for example, a type K thermocouple made of nickel-chromium alloy. Therefore, the temperature sensing element 22 includes a temperature sensing element, such as a nickel-chromium alloy wire, whose resistance changes with temperature to generate a changing temperature signal. The temperature sensor 20 also includes a temperature measuring circuit electrically connected to the temperature sensing element. The temperature measuring circuit converts the temperature signal from the temperature sensing element, which changes synchronously with temperature, into an electrical signal, amplifies the electrical signal, and then processes the amplified electrical signal into a temperature value through a processor to obtain the actual temperature of the soldering iron tip.

[0042] In one embodiment, the conductive sleeve 22 is made of stainless steel tubing, and the temperature sensing element 21 includes a temperature sensing element. The conductive sleeve 22 forms the positive signal terminal of the temperature sensor 20, and the temperature sensing element 21 forms the negative signal terminal of the temperature sensor 20. The positive and negative signal terminals are connected to the temperature measuring circuit. The positive and negative signal terminals can output the resistance value of the temperature sensing element to the temperature measuring circuit. The temperature measuring circuit can convert the changing temperature signal of the temperature sensing element into an electrical signal and amplify it. The temperature measuring circuit is also connected to a processor, which can process the amplified electrical signal into a temperature value.

[0043] In this application, along the direction from the front end 11 to the rear end 12 of the body 10, the length of the mounting hole 13, the length of the conductive sleeve 22, and the length of the temperature sensing element 21 increase sequentially, so that part of the conductive sleeve 21 extends to the outside of the mounting hole 13 and part of the temperature sensing element 21 extends to the outside of the conductive sleeve 22, so as to facilitate electrical connection with the temperature measuring circuit.

[0044] After the temperature sensing element is inserted into the conductive sleeve 22, in order to form insulation between the two, the temperature sensor 20 provided in this embodiment also includes an insulating sleeve group 23. The temperature sensing element 21 is inserted into the insulating sleeve group 23, and the insulating sleeve group 23 is inserted into the conductive sleeve 22. The interface of the insulating sleeve group 23 provides insulation between the temperature sensing element and the conductive sleeve 22.

[0045] The temperature sensing element, made of nickel-chromium alloy wire, typically extends outside the insulating sleeve assembly 23. Stress can easily occur between the sensing element and the end of the insulating sleeve assembly 23 furthest from the temperature sensing end 221, potentially causing breakage. To address this, the temperature sensor 20 provided in this embodiment also includes a support sleeve 24. The support sleeve 24 passes through the insulating sleeve assembly 23, and at least a portion of the support sleeve 24 extends outside the insulating sleeve assembly 23. The support sleeve 24 provides support between the temperature sensing element 21 and the insulating sleeve assembly 23, reducing stress and preventing breakage. The temperature sensing element 21 passes through the support sleeve 24, and at least a portion of the temperature sensing element 21 extends outside the support sleeve 24.

[0046] In one embodiment, the insulating sleeve assembly 23 includes at least two insulating sleeves 231 connected in series, and the temperature sensing element 21 is disposed in the at least two insulating sleeves 231. In this embodiment, two insulating sleeves 231 are provided, one of which is made of Teflon material and the other is made of glass fiber material.

[0047] In this application, the shape of the heat-conducting end 131 is adapted to the shape of the temperature-sensing end 221, both adopting an approximately conical shape to form surface contact and improve heat conduction efficiency.

[0048] The thermally conductive filler 30 is a thermally conductive adhesive used to fill the gap between the thermally conductive end 131 and the temperature measuring end 221. This thermally conductive adhesive is an inorganic high-temperature ceramic adhesive composed of 25% sodium silicate solution, 60% alumina, 5% kaolin, and 10% deionized water. 0.6 ml of the thermally conductive adhesive is pre-injected into the cavity 14 of the thermally conductive end 131 using a dispensing machine before installing the temperature sensor 20 to increase the contact area between the thermally conductive end 131 and the temperature measuring end 221. After the temperature sensor 20 is installed, the rear end 12 is fastened to the temperature sensor using a clamping device (the clamping force must be carefully controlled during the clamping process to avoid damaging the temperature sensing element 21). Then, the body 10 is mounted on the bracket with one end facing upwards and baked in an oven at 75°C for 2 hours, followed by baking at 120°C for 2 hours.

[0049] In this embodiment, as Figure 4 As shown, the soldering iron tip 100 may also omit the support sleeve 24, and the temperature sensing element 21 may simply be inserted into the insulating sleeve assembly 23. In this case, a temperature sensing element 21 with a diameter larger than that fitted with the support sleeve 24 should be selected. Figure 4 The image shown is of a temperature sensing element 24 without a support sleeve 24. Typically, a temperature sensing element 21 with a diameter of 0.8 mm is selected. Figures 1-3 The image shows a temperature sensing element 21 with a support sleeve 24. Typically, a temperature sensing element 21 with a diameter of 0.3 mm is selected.

[0050] Example 2

[0051] This embodiment provides an electric soldering iron, which includes the soldering tip 100 described in Embodiment 1, and also includes a handle connected to the rear end 12 of the body 10. For the specific structure of the soldering tip 100, please refer to the above embodiment, which will not be repeated here.

[0052] In summary, the soldering tip and soldering iron provided in this application have a temperature sensor installed in the mounting hole of the body to form an integrated soldering tip, and a thermally conductive filler is filled in the cavity between the temperature measuring end and the thermally conductive end, so that the temperature measuring end and the thermally conductive end form a surface contact, thereby increasing the contact area, improving the heat conduction efficiency, and thus improving the detection efficiency of the temperature sensor.

[0053] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A soldering iron tip, characterized in that, include: The body has a front end and a rear end. The body has a mounting hole inside it from the rear end to the front end. The end of the mounting hole extending into the front end is a heat-conducting end. A temperature sensor having a temperature measuring end is installed in the mounting hole and the temperature measuring end is in contact with the heat-conducting end. A thermally conductive filler is provided to fill the gap between the temperature measuring end and the thermally conductive end.

2. The soldering iron tip as described in claim 1, characterized in that, The temperature sensor includes a temperature sensing element and a conductive sleeve. The conductive sleeve is installed in the mounting hole, and the temperature measuring end is formed at one end of the conductive sleeve facing the heat-conducting end. The temperature sensing element is installed inside the conductive sleeve and connected to the temperature measuring end.

3. The soldering iron tip as described in claim 2, characterized in that, The temperature detection element includes a temperature sensing element, and the temperature sensor further includes an insulating sleeve assembly. The temperature detection element passes through the insulating sleeve assembly, and the insulating sleeve assembly passes through the conductive sleeve.

4. The soldering iron tip as described in claim 3, characterized in that, The temperature sensor also includes a temperature measuring circuit, which is electrically connected to the temperature sensing element.

5. The soldering iron tip as described in claim 3, characterized in that, The temperature sensor further includes a support sleeve that passes through the insulating sleeve assembly and at least a portion of the support sleeve extends to the outside of the insulating sleeve assembly. The temperature sensing element passes through the support sleeve and at least a portion of the temperature sensing element extends to the outside of the support sleeve.

6. The soldering iron tip as described in claim 5, characterized in that, The insulating sleeve assembly includes at least two insulating sleeves connected in series, and the temperature sensing element is inserted through at least two of the insulating sleeves.

7. The soldering iron tip as described in claim 2, characterized in that, Along the direction from the front end to the rear end of the body, the length of the mounting hole, the length of the conductive sleeve, and the length of the temperature sensing element increase sequentially.

8. The soldering iron tip as described in claim 7, characterized in that, The shape of the heat-conducting end is adapted to the shape of the temperature-sensing end.

9. The soldering iron tip as described in claim 1, characterized in that, The thermally conductive filler is a thermally conductive adhesive used to fill the gap between the thermally conductive end and the temperature measuring end.

10. A soldering iron, characterized in that, Includes the soldering iron tip as described in any one of claims 1-9.

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