Inductor

Abstract

The utility model relates to the technical field of inductors, in particular to an inductor capable of conducting temperature detection. As the elastic arm is provided with the wire passing limiting channel which can limit the shaking of the lead and reduce the shaking amplitude of the lead, when the lead is connected with the terminal, one end of the lead, which is used for being connected with the terminal, is more easily controlled within the range, so that the lead is conveniently connected with the terminal; therefore, the technical problem of low manufacturing efficiency caused by excessive shaking amplitude of the lead when the lead of the temperature sensor in the current inductor is connected with the terminal is solved.

Description

Technical Field

[0001] This application relates to the technical field of inductors, and particularly to an inductor capable of temperature detection. Background Art

[0002] In the design of high-power integrated inductors, in order to achieve good heat dissipation of the inductor coil, the outer surface of the inductor coil can be completely exposed around, or an oil-cooling heat dissipation method, a heat dissipation method where the bottom or side of the coil is closely attached to a water-cooling plate, or a potting heat dissipation method with a high thermal conductivity coefficient can be adopted. These are all extremely important heat dissipation design methods. When a high-power inductor is working, the heat generated by the inductor wire and the internal magnetic core will cause the overall temperature of the inductor to rise. In order to accurately detect and control the working temperature of the inductor, temperature sensing devices such as thermistors also need to be installed on the surface of the inductor coil to achieve the temperature detection of the inductor coil.

[0003] Chinese Patent Application with Publication No. CN115769321A discloses an inductor with temperature detection. The temperature sensor of this inductor is built into the inductor. It can not only accurately measure the temperature of the inductor coil, but also has excellent characteristics of resistance to high-intensity mechanical vibration and impact and excellent oil resistance, thus effectively controlling the comprehensive cost of the fixed installation of the temperature sensor on the inductor. In addition, this inductor adopts an internal installation method, placing the sensor element inside the inductor and closely contacting the inner side of the coil, greatly improving the accuracy of the temperature sensor. Currently, during the manufacturing process of the sensor, the lead of the temperature sensor needs to be connected to the lead terminal. Since the lead of the temperature sensor is relatively long, the lead is prone to excessive shaking during connection, which is not convenient for machine automation operation and causes the technical problem of low manufacturing efficiency. Utility Model Content

[0004] This application provides an inductor to improve the technical problem that the lead of the temperature sensor in the current inductor is prone to excessive shaking during connection with the terminal, resulting in low manufacturing efficiency.

[0005] According to a first aspect, an inductor is provided in one embodiment, including:

[0006] A magnetic core;

[0007] A coil, at least a part of the magnetic core passes through the coil;

[0008] A temperature sensor, the temperature sensor includes a sensing part and a lead; the sensing part contacts the inner side of the coil to sense the temperature of the coil; the lead is connected to the sensing part;

[0009] Sensor base, the sensor base includes a terminal base and a spring arm, the spring arm extends into the space between the coil and the magnetic core, one end of the spring arm is connected to the terminal base, and the other end of the spring arm mounts the sensing part;

[0010] The inductor includes terminals, the terminals are mounted on the terminal base and connected to the leads; a wire passing limiting channel for restricting the shaking of the leads is provided on the spring arm, and the leads pass through the wire passing limiting channel.

[0011] Further, in one embodiment, the wire passing limiting channel is a wire passing groove or a wire passing hole provided on the spring arm.

[0012] Further, in one embodiment, in the length direction of the spring arm, the wire passing limiting channel is located in the middle of the spring arm.

[0013] Further, in one embodiment, the spring arm includes a connecting handle and a support plate, the length direction of the support plate is the same as the length direction of the spring arm, the number of the leads is at least two, at least one of the leads is a first lead, at least one lead is a second lead, the first lead and the second lead are arranged in the width direction of the support plate, and the first lead and the second lead are respectively on both sides of the connecting handle in the width direction of the support plate.

[0014] Further, in one embodiment, the connecting handle includes a connecting section extending to the support plate, a protrusion is provided on the support plate, and a wire passing groove is formed between the protrusion and the connecting section, and the wire passing groove forms the wire passing limiting channel.

[0015] Further, in one embodiment, the two sides in the thickness direction of the support plate are a first side and a second side respectively, the connecting section is on the first side of the support plate, and one side surface of the connecting handle is flush with the plate surface of the second side of the support plate.

[0016] Further, in one embodiment, an installation groove is provided on the support plate, and the sensing part is installed in the installation groove.

[0017] Further, in one embodiment, the end of the spring arm for mounting the temperature sensor is a free end, and the other end is a connecting end connecting the terminal base, the free end is on the support plate, the support plate includes a plate body, a first protrusion on one side of the plate body and a second protrusion on the other side of the plate body, and the installation groove is on the first protrusion.

[0018] Further, in one embodiment, the bottom surface of the installation groove is flush with the plate surface of the plate body.

[0019] Further, in one embodiment, the leads are welded to the terminals.

[0020] For the inductor according to the above embodiments, since the wire passing limiting channels are provided on the elastic arms, the wire passing limiting channels can limit the shaking of the leads, reduce the shaking amplitude of the leads. In this way, when the leads are connected to the terminals, the end of the lead for connecting to the terminal is easier to be controlled within a range, thereby facilitating the connection between the lead and the terminal, and thus improving the technical problem that the leads are prone to excessive shaking amplitude when the leads of the temperature sensor in the current inductor are connected to the terminals, resulting in low production efficiency. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the installation structure of the coil, coil seat and sensor seat of the inductor in an embodiment;

[0022] Figure 2 It is a sectional view of the coil, coil seat and sensor seat of the inductor in an embodiment;

[0023] Figure 3 It is another sectional view of the coil, coil seat and sensor seat of the inductor in an embodiment;

[0024] Figure 4 It is a mounting structure diagram of the temperature sensor and sensor seat of the inductor in an embodiment;

[0025] Figure 5 It is a sectional view of the temperature sensor and sensor seat of the inductor in an embodiment.

[0026] List of the feature names corresponding to the reference numerals in the drawings: 1. Coil; 2. Temperature sensor; 21. Inductive part; 22. Lead; 221. First lead; 222. Second lead; 3. Sensor seat; 31. Terminal seat; 311. Plug post; 32. Elastic arm; 321. Wire passing limiting channel; 322. Connection handle; 3221. Connection section; 323. Support plate; 3231. Protrusion; 3232. Installation groove; 3233. Plate body; 3234. First protrusion; 3235. Second protrusion; 324. Free end; 325. Connection end; 4. Terminal; 5. Coil seat; 51. Jack.

[0027] Explanation of the reference numerals with brackets in the drawings: Among the reference numerals with brackets in the drawings, the feature referred to by the reference numeral is both the feature represented by the number inside the brackets and the feature represented by the number outside the brackets. Detailed Embodiments

[0028] The present application will be further described in detail below in conjunction with the specific embodiments and the accompanying drawings. Similar elements in different embodiments are denoted by related similar element numbers. In the following embodiments, many detailed descriptions are provided to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid overwhelming the core part of the present application with excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0029] In addition, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for clearly describing a certain embodiment, and do not mean that they are the necessary sequences, unless it is otherwise stated that a certain sequence must be followed.

[0030] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct connection, indirect connection, and contact connection (coupling), etc.

[0031] In one embodiment, please refer to Figures 1 to 5 , the inductor includes a magnetic core (not shown in the figure), a coil 1, a temperature sensor 2, and a sensor base 3. At least a part of the magnetic core passes through the coil 1. The temperature sensor 2 includes a sensing part 21 and a lead 22 connected to the sensing part 21. The sensing part 21 contacts the inner side surface of the coil 1 to sense the temperature of the coil 1.

[0032] The sensor base 3 includes a terminal base 31 and a spring arm 32. The spring arm 32 extends into the space between the coil 1 and the magnetic core. One end of the spring arm 32 is connected to the terminal base 31, and the other end of the spring arm 32 mounts the sensing part 21. The inductor includes a terminal 4, and the terminal 4 is mounted on the terminal base 31 and connected to the lead 22. The spring arm 32 is provided with a wire-passing limiting channel 321, and the lead 22 passes through the wire-passing limiting channel 321. The channel wall of the wire-passing limiting channel 321 can limit the swaying of the lead 22.

[0033] Since the wire-passing limiting channel 321 is provided on the elastic arm 32, the wire-passing limiting channel 321 can limit the shaking of the lead wire 22 and reduce the shaking amplitude of the lead wire 22. In this way, when the lead wire 22 is connected to the terminal 4, the end of the lead wire 22 for connecting to the terminal 4 is easier to be controlled within a range, thereby facilitating the connection between the lead wire 22 and the terminal 4, and thus improving the technical problem that the lead wire 22 is prone to excessive shaking amplitude during the connection between the lead wire 22 of the temperature sensor 2 and the terminal 4 in the current inductor, resulting in low production efficiency.

[0034] It should be noted that the structures of the magnetic core, the coil 1 and the coil base 5 in this application can be any feasible structures in the prior art. For example, reference can be made to the structures disclosed in the Chinese patent application with the application publication number CN115769321A.

[0035] In one embodiment, please refer to Figures 1 to 5 , there are two coils 1. The magnetic core is square, and the magnetic core includes two parallel magnetic core columns. The two coils 1 are respectively wound around the peripheries of the two magnetic core columns of the magnetic core. In one embodiment, the coil 1 and the magnetic core are fixed together by injection molding. After the two coils 1 are pre-assembled together through the coil base 5, the magnetic core, the coil 1 and the coil base 5 are assembled together, and then the insulator is injection molded to fix the magnetic core, the coil 1 and the coil base 5. In one embodiment, the coil 1 and the magnetic core can also be fixed by potting the insulator.

[0036] Regarding the wire-passing limiting channel 321, it can be any feasible way. For example, in one embodiment, please refer to Figures 1 to 5 , the wire-passing limiting channel 321 is a wire-passing groove provided on the elastic arm 32. For another example, in one embodiment, the wire-passing limiting channel 321 is a wire-passing hole provided on the elastic arm 32. For another example, in one embodiment, a wire clip is provided on the elastic arm 32, and the lead wire 22 is fixed in the wire card slot of the wire clip, and the wire card slot forms the wire-passing limiting channel 321.

[0037] The channel wall of the wire-passing limiting channel 321 can play a blocking role on the lead wire 22, so as to achieve the purpose of limiting the shaking of the lead wire 22. In one embodiment, please refer to Figures 1 to 5 , for the convenience of installing the lead wire 22, the lead wire 22 and the wire-passing limiting channel 321 can move relative to each other. In this application, the wire-passing limiting channel 321 restricting the shaking of the lead wire 22 means restricting the shaking amplitude of the lead wire 22. The purpose is to reduce the shaking amplitude of the lead wire 22, which includes both making the shaking amplitude of the lead wire 22 within the designed range and making the part of the lead wire 22 within the wire-passing limiting channel 321 not shake. Of course, it is also feasible to fix the lead wire 22 and the wire-passing limiting channel 321 together, which also belongs to the scope of restricting the shaking of the lead wire 22.

[0038] In one embodiment, please refer to Figures 3 to 5, in the length direction of the elastic arm 32, the wire passing and limiting channel 321 is located in the middle of the elastic arm 32. This can not only reduce the shaking amplitude of the lead wire 22, but also reduce the influence on the connection operation between the lead wire 22 and the terminal 4. In some other embodiments, the wire passing and limiting channel 321 can also be located at one end where the elastic arm 32 is connected to the terminal block 31.

[0039] In one embodiment, please refer to Figures 3 to 5 , the elastic arm 32 includes a connecting handle 322 and a support plate 323. The length direction of the support plate 323 is the same as the length direction of the elastic arm 32. The number of lead wires 22 is at least two. At least one lead wire 22 is a first lead wire 221, and at least one lead wire 22 is a second lead wire 222. The first lead wire 221 and the second lead wire 222 are arranged in the width direction of the support plate 323, and the first lead wire 221 and the second lead wire 222 are respectively located on both sides of the connecting handle 322 in the width direction of the support plate 323. This can facilitate the arrangement of the lead wire 22. In some other embodiments, the first lead wire 221 and the second lead wire 222 can also be on the same side of the connecting handle 322.

[0040] In some other embodiments, the elastic arm 32 can be any feasible structure. For example, the elastic arm 32 can be an integral plate-like structure, or can be an integral round rod structure, or can also be a long strip bracket structure.

[0041] In one embodiment, please refer to Figures 3 to 5 , the connecting handle 322 includes a connecting section 3221 extending to the support plate 323. There is a protrusion 3231 on the support plate 323. A wire passing groove is formed between the protrusion 3231 and the connecting section 3221, and the wire passing groove forms the wire passing and limiting channel 321. By forming the wire passing and limiting channel 321 with the protrusion 3231 and the connecting section 3221, the structure is simpler and the installation is more convenient. In some other embodiments, a groove can also be directly formed on the support plate 323.

[0042] In one embodiment, please refer to Figures 3 to 5 , the two sides in the thickness direction of the support plate 323 are respectively the first side and the second side. The connecting section 3221 is located on the first side of the support plate 323. One side surface of the connecting handle 322 is flush with the plate surface of the second side of the support plate 323. In this way, the connecting handle 322 has a smaller volume, occupies less space, has a smaller dimension in the thickness direction of the support plate 323, and is easily elastically deformed. In some other embodiments, the connecting section 3221 can also protrude from the second side of the support plate 323 in the thickness direction of the support plate 323.

[0043] In one embodiment, please refer to Figure 4 , the protrusion 3231 is flat, and the cross section of the protrusion 3231 is in the shape of a long waist. The extending direction of the waist length of the long waist shape is the same as the extending direction of the lead wire 22.

[0044] In one embodiment, please refer to Figures 4 to 5 , an installation groove 3232 is provided on the support plate 323, and the induction part 21 is installed in the installation groove 3232. The installation groove 3232 can protect the induction part 21. In order to enable the induction part 21 to contact the inner wall of the coil 1, a part of the induction part 21 protrudes from the installation groove 3232. In some other embodiments, the induction part 21 can also be directly installed on the plate surface of the support plate 323.

[0045] In one embodiment, please refer to Figures 3 to 5 , one end of the elastic arm 32 for installing the temperature sensor 2 is the free end 324, and the other end is the connection end 325 connected to the connection terminal seat 31. The free end 324 is located on the support plate 323. The support plate 323 includes a plate body 3233, a first protrusion 3234 on one side of the plate body 3233, and a second protrusion 3235 on the other side of the plate body 3233. The installation groove 3232 is located on the first protrusion 3234. By respectively arranging the first protrusion 3234 and the second protrusion 3235 on both sides of the plate body 3233 of the support plate 323, the thickness of the free end 324 can be increased, thereby increasing the strength of the free end 324, enabling the installation groove 3232 to have a larger size, and thus adapting to induction parts 21 of multiple sizes.

[0046] In one embodiment, please refer to Figures 4 to 5 , the bottom surface of the installation groove 3232 is flush with the plate surface of the plate body 3233. This facilitates the lead 22 to be led out of the installation groove 3232. In some other embodiments, the bottom surface of the installation groove 3232 can also be higher than or lower than the plate surface of the plate body 3233.

[0047] In one embodiment, please refer to Figures 1 to 5 , the lead 22 is welded to the terminal 4, which facilitates the automated welding of the lead 22 and the terminal 4. In some other embodiments, the lead 22 and the terminal 4 can also be fixed by fasteners.

[0048] In one embodiment, please refer to Figures 1 to 5 , the terminal seat 31 and the elastic arm 32 are integrally injection-molded. In some other embodiments, the terminal seat 31 and the elastic arm 32 can also be connected by other means such as welding and bonding. Similarly, in some embodiments, the connection handle 322 and the support plate 323 can also be connected by means such as integral injection molding, welding, bonding, or fixing with fasteners.

[0049] In one embodiment, please refer to Figures 1 to 5 , the coil seat 5 has a jack 51, and the terminal seat 31 has a plug post 311 inserted into the jack 51. After the terminal seat 31 and the coil seat 5 are inserted together, they are fixed together by an outer injection-molded insulator.

[0050] It should be noted that the "ends" in this application should be understood as regions with a certain length, and are not limited to the end faces of objects.

[0051] The above uses specific examples to illustrate this application, which is only used to help understand this application and is not intended to limit this application. For those skilled in the technical field to which this application belongs, based on the idea of this application, several simple deductions, deformations or substitutions can also be made.

Claims

1. An inductor, characterized in that, Comprising: A magnetic core; A coil, at least a part of the magnetic core passing through the coil; A temperature sensor, the temperature sensor including a sensing part and a lead; The sensing part is in contact with the inner side surface of the coil for sensing the temperature of the coil; the lead is connected to the sensing part; A sensor base, the sensor base including a terminal base and a spring arm, the spring arm extending into the space between the coil and the magnetic core, one end of the spring arm being connected to the terminal base, and the other end of the spring arm mounting the sensing part; The inductor includes terminals, the terminals being mounted on the terminal base and connected to the leads; a wire-passing limiting channel for restricting the shaking of the leads is provided on the spring arm, and the leads pass through the wire-passing limiting channel; 2. The inductor according to claim 1, wherein, The wire-passing limiting channel is a wire-passing groove or a wire-passing hole provided on the spring arm; 3. The inductor according to claim 1 or 2, characterized in that, In the length direction of the spring arm, the wire-passing limiting channel is located in the middle of the spring arm; 4. The inductor according to claim 1 or 2, characterized in that, The spring arm includes a connecting handle and a support plate, the length direction of the support plate being the same as the length direction of the spring arm, the number of the leads being at least two, at least one of the leads being a first lead, at least one lead being a second lead, the first lead and the second lead being arranged in the width direction of the support plate, and the first lead and the second lead being respectively on both sides of the connecting handle in the width direction of the support plate; 5. The inductor according to claim 4, wherein The connecting handle includes a connecting section extending to the support plate, a protrusion is provided on the support plate, and a wire-passing groove is formed between the protrusion and the connecting section, and the wire-passing groove forms the wire-passing limiting channel; 6. The inductor according to claim 5, wherein The two sides in the thickness direction of the support plate are respectively a first side and a second side, the connecting section is on the first side of the support plate, and one side surface of the connecting handle is flush with the plate surface of the second side of the support plate; 7. The inductor according to claim 4, wherein, An installation groove is provided on the support plate, and the sensing part is installed in the installation groove; 8. The inductor according to claim 7, characterized in that, One end of the spring arm for mounting the temperature sensor is a free end, and the other end is a connecting end connecting the terminal base, the free end is on the support plate, the support plate includes a plate body, a first protrusion on one side of the plate body, and a second protrusion on the other side of the plate body, and the installation groove is on the first protrusion; 9. The inductor according to claim 8, wherein, The bottom surface of the installation groove is flush with the plate surface of the plate body; 10. The inductor according to claim 1 or 2, characterized in that, The leads are welded to the terminals.

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