Resistor

Abstract

The utility model relates to a resistor, and relates to the technical field of resistors. The resistor provided by the utility model comprises a shell, a resistor element, a connecting terminal and a pair of terminal parts, a convex part protruding out of the inner bottom surface is arranged on the inner bottom surface of the shell, or a convex part protruding out of the inner side wall is arranged on the inner side wall of the shell, and the convex parts are respectively used for fixing two end parts of the resistor element. By arranging the convex part on the inner side wall or the inner bottom surface of the shell, the end part resistor element of the resistor element can be fixed in the shell, and the convex part protrudes from the inner side wall or the inner bottom surface, namely, the convex part has a certain height, so that the convex part can separate the resistor element from the inner side wall or the inner bottom surface of the shell; according to the utility model, a safe insulation distance is formed between the resistor element and the inner surface of the shell, so that the insulativity can be ensured without arranging an additional insulation partition wall or an insulation part, the number of parts of the resistor is reduced, the manufacturing process can be simplified, and the production efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, and in particular to a resistor. Background Technology

[0002] To accelerate the electrification of automobiles, achieve longer driving ranges and shorter charging times, higher voltages such as 800V and 1200V are required, which in turn requires higher voltage limiting resistors.

[0003] As a means of dealing with high voltage, resistors that incorporate resistive elements within a metal casing have been proposed. In such resistors, it is essential to ensure insulation between the resistive elements and the casing. For example, one existing resistor comprises multiple resistive elements and a metal casing housing each element. To guarantee insulation, separate insulating walls are installed at the left and right ends of the resistive elements, and a separate insulating component is placed between the resistive elements and the inner wall of the casing. However, this structure increases the number of components in the resistor, making the manufacturing process more complex. Utility Model Content

[0004] This invention provides a resistor to solve at least one of the above-mentioned technical problems.

[0005] This utility model provides a resistor, comprising:

[0006] case;

[0007] A resistive element, housed within the housing, the resistive element comprising a core material made of a plate-shaped insulating substrate, the core material having a resistive wire wound around it, and the core material having an outer pair of outer edges extending along the length of the housing;

[0008] Connection terminals, which are electrically connected to the resistive element; and

[0009] A pair of terminal portions, each of which is electrically connected to a corresponding connection terminal, and a portion of each terminal portion protrudes beyond the housing;

[0010] The inner bottom surface of the housing is provided with a protrusion protruding from the inner bottom surface, or the inner sidewall of the housing is provided with a protrusion protruding from the inner sidewall, and the protrusions are respectively used to fix the two ends of the resistive element.

[0011] In one embodiment, the protrusions are located at both ends of the inner bottom surface and extend between two opposing inner sidewalls of the housing along the width direction of the housing;

[0012] Each of the protrusions is provided with one or more recesses for accommodating the bottom end of the resistive element. When there is only one recess, the recess accommodates the end of each resistive element. When there are multiple recesses, the number of recesses corresponds one-to-one with the number of resistive elements, so that each recess can accommodate the end of the corresponding resistive element.

[0013] In one embodiment, the number of recesses is at least three, and the recesses are spaced apart along the width direction of the housing, wherein the depth of each recess is set in an alternating manner according to a first depth and a second depth in the width direction of the housing.

[0014] In one embodiment, the difference between the depth of the outermost recess and the depth of the middle recess is equal to the thickness of the connecting terminal.

[0015] In one embodiment, a base is further provided on the inner bottom surface of the housing. The base is located between the protrusion and the inner sidewall facing the protrusion. The base is higher than the bottom surface of the recess, so that the bottom end of the resistive element can contact the base and have a gap between it and the bottom surface of the recess.

[0016] In one embodiment, the base is provided with a boss, which is provided in correspondence with the recess located in the middle position of each recess, so as to support the bottom end of the resistor element located in the middle position of each resistor element.

[0017] In one embodiment, the bottom surface of the recess has a rounded corner structure, which creates a gap between the bottom end of the resistive element and the bottom surface of the recess.

[0018] In one embodiment, the housing is further provided with a spacer wall that extends along the length of the housing between the protrusions and is located between two adjacent resistive elements.

[0019] In one embodiment, the protrusions are respectively located on a pair of inner sidewalls of the housing that are parallel to the width direction and protrude along the length direction of the housing;

[0020] The protrusions located on the same inner sidewall are spaced apart in the width direction of the housing to accommodate the ends of the resistive elements therebetween.

[0021] In one embodiment, a platform protruding from the inner bottom surface of the housing is further provided, the platform being used to support the bottom end of the resistive element; and / or

[0022] The inner bottom surface of the housing is also provided with a partition wall extending along the length direction of the housing, and the partition wall is located between two adjacent resistive elements.

[0023] In one embodiment, the housing is made of a metallic material and is filled with a sealing material that, after curing, can fix the resistive element in the housing.

[0024] Compared with the prior art, the advantages of this utility model are that by providing a protrusion on the inner sidewall or inner bottom surface of the housing, the end resistor element can be fixed inside the housing. Since the protrusion protrudes from the inner sidewall or inner bottom surface, that is, the protrusion has a certain height, the protrusion can separate the resistor element from the inner sidewall or inner bottom surface of the housing, so that there is a safe insulation distance between the resistor element and the inner surface of the housing. Therefore, insulation can be guaranteed without setting additional insulating partitions or insulating parts, thereby reducing the number of resistor components, simplifying the manufacturing process and improving production efficiency. Attached Figure Description

[0025] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0026] Figure 1 This is a three-dimensional structural diagram of the resistor in Embodiment 1 of this utility model, showing the state after the sealing material is poured into the housing;

[0027] Figure 2 This is a three-dimensional structural schematic diagram of the resistive element of the resistor in Embodiment 1 of this utility model;

[0028] Figure 3 This is an exploded view of the resistor in Embodiment 1 of this utility model;

[0029] Figure 4a This is a top view of the resistor in Embodiment 1 of this utility model, where the sealing material is not shown;

[0030] Figure 4b It shows Figure 4a A variation thereof;

[0031] Figure 5 yes Figure 2 The front view of the core material shown;

[0032] Figure 6 yes Figure 1 A three-dimensional structural schematic diagram of the shell shown;

[0033] Figure 7 It shows Figure 6 A modified example of the shell shown;

[0034] Figure 8a This is a three-dimensional structural diagram of the resistor in Embodiment 2 of this utility model, wherein the sealing material is not shown;

[0035] Figure 8b This is a three-dimensional structural diagram of the resistor housing in Embodiment 2 of this utility model;

[0036] Figure 9 This is a three-dimensional structural diagram of the resistor housing in Embodiment 3 of this utility model;

[0037] Figure 10a This is a perspective view of the resistor housing in Embodiment 3 of this utility model, with its internal structure shown in dashed lines;

[0038] Figure 10b It shows Figure 10a A modified example of the shell shown;

[0039] Figure 11 It shows Figure 10a Another variation of the shell shown;

[0040] Figure 12 This is a three-dimensional structural schematic diagram of the resistor in Embodiment 4 of this utility model, showing the state after the sealing material is poured into the housing;

[0041] Figure 13 This is a three-dimensional structural diagram of the resistor in Embodiment 4 of this utility model, which only shows the housing and the core material;

[0042] Figure 14a yes Figure 13 A three-dimensional structural schematic diagram of the shell shown;

[0043] Figure 14b yes Figure 13 A modified example of the shell shown;

[0044] Figure 15 yes Figure 14a A sectional view at A1-A1, where section lines are not shown;

[0045] Figure 16 yes Figure 14a A sectional view at A2-A2, where section lines are not shown;

[0046] Figure 17a yes Figure 14a A sectional view at BB, where section lines are not shown;

[0047] Figure 17b Is Figure 17a The diagram shows a structure in which the core material is placed inside the shell, with the core material shown in dashed lines.

[0048] Figure 18 yes Figure 14a A three-dimensional sectional view at BB, where section lines are not shown;

[0049] Figure 19 yes Figure 18 Enlarged view at point I;

[0050] Figure 20 This is a three-dimensional structural diagram of the resistor housing in Embodiment 5 of this utility model;

[0051] Figure 21 yes Figure 20 A sectional view at CC, where section lines are not shown.

[0052] Figure label:

[0053] 10. Housing; 20. Resistive element; 30. Connecting terminal; 40. Terminal section;

[0054] 11. First inner sidewall; 12. Second inner sidewall; 13. Inner bottom surface;

[0055] 14. Protruding part; 141. First convex part; 142. Second convex part; 143. Concave part; 144. Guide part; 145. Accommodating part;

[0056] 1431. The first concave part; 1432. The second concave part; 1433. The third concave part;

[0057] 15. Third inner wall; 16. Fourth inner wall;

[0058] 17. Fixing plate; 171. Connecting hole;

[0059] 18. Partition wall; 19. Base; 191. Boss;

[0060] 21. Core material; 22. Resistance wire;

[0061] 211. Winding section; 212. Groove. Detailed Implementation

[0062] The present invention will be further described below with reference to the accompanying drawings.

[0063] Example 1

[0064] like Figures 1-7 As shown, according to Embodiment 1 of the present invention, the present invention provides a resistor, and more specifically, the resistor of the present invention is a high-voltage resistor for electric vehicles or hybrid vehicles.

[0065] like Figure 1 , Figure 2 and Figure 3As shown, the resistor of this invention includes a housing 10, a resistive element 20, connecting terminals 30, and a pair of terminal portions 40. The housing 10 is made of a metallic material (e.g., aluminum) or a ceramic material. Figure 6 As shown, the housing 10 is a box-shaped structure that extends along the length direction (X-axis direction), that is, the dimension (size) of the housing 1 in the length direction is larger than that in the width direction (Y-axis direction).

[0066] In this embodiment, the housing 10 is configured as a rectangular structure when viewed from above. For example... Figure 3 As shown, and please refer to Figure 6 The housing 10 includes an inner bottom surface 13 forming a box-shaped structure and a plurality of inner sidewalls, which together define a receiving space within the housing 10. The resistive element 20, the connecting terminal 30, and a portion of a pair of terminal portions 40 may be located within this receiving space. Figure 3 As shown, the resistor element 20, the connecting terminal 30, and the pair of terminal portions 40 can be integrated into a single unit, and then... Figure 2 The components are placed together in the receiving space of the housing 10 along the Z-axis direction; and a sealing material (such as cement or resin) is injected into the receiving space. The sealing material flows between the components inside the housing 10, and after curing, it can play a role in insulation and fixation.

[0067] The resistive element 20 includes a core 21 made of a plate-shaped insulating substrate, wherein the plate-shaped insulating substrate may be, for example, a mica substrate or a ceramic substrate.

[0068] like Figure 2 and Figure 5 As shown, the core material 21 has a long strip structure, and the length direction of the core material 21 is consistent with the length direction of the shell 10. Figure 5 As shown, the middle portion of the core material 21 is a winding portion 211, on which a resistance wire 22 is wound. The two ends of the core material 21 are not wound with the resistance wire 22 and are used to connect to the connection terminals 30. The resistance wire 22 can, for example, be wound along the height direction of the core material 21. The core material 21 has an outer edge portion (i.e., extending along the length direction of the housing 10) extending along the length direction of the housing 10. Figure 5 The core material 21 shown has two ends in the Z-axis direction.

[0069] Furthermore, the core material 21 has multiple grooves 212 at both ends, and the connecting terminal 30 can be connected to the core material 21 through the corresponding grooves 212.

[0070] The number of resistive elements 20 can be three or more, for example... Figure 2 and Figure 3An example of three resistive elements 20 is shown. Multiple resistive elements 20 can be electrically connected via connecting terminals 30. For example, connecting terminals 30 can connect multiple resistive elements 20 end to end, thereby connecting multiple resistive elements in series; or connecting terminals 30 can connect the beginning ends of multiple resistive elements 20 to the beginning ends and the end ends to the end ends, thereby connecting multiple resistive elements in series.

[0071] Terminal portions 40 generally appear in pairs, such as Figure 1 and Figure 3 As shown, a portion of each of the two terminal portions 40 is located inside the housing 10, while the other portion protrudes outside the housing 10 along its height direction. The terminal portions 40 located inside the housing 10 are respectively connected to corresponding connection terminals 30 inside the housing 10, and the terminal portions 40 can serve as interfaces for connecting to external devices.

[0072] like Figure 3 As shown, a protrusion 14 protruding from the inner sidewall of the housing 10 is provided, which is used to fix the two ends of the core material 21. The protrusion 14 is located on a pair of inner sidewalls of the housing 10 that are parallel to the width direction and extends protruding along the length direction of the housing 10.

[0073] Specifically, such as Figure 6 As shown, the inner wall of the housing 10 includes the length direction of the housing 10 (e.g., Figure 6 The first inner sidewall 11 and the second inner sidewall 12 are arranged opposite each other in the X-axis direction (as shown) and in the width direction of the housing 10 (e.g., Figure 6 The third inner wall 15 and the fourth inner wall 16 are arranged opposite each other in the Y-axis direction (as shown). The first inner wall 11 and the second inner wall 12 can be symmetrically arranged about the center line of the Y-axis direction of the housing 10, and the third inner wall 15 and the fourth inner wall 16 can be symmetrically arranged about the center line of the X-axis direction of the housing 10.

[0074] like Figure 6 As shown, and please refer to Figure 4a The first inner sidewall 11 and the second inner sidewall 12 are respectively provided with protrusions 14 for fixing the two ends of the core material 21. The number of protrusions 14 is multiple, such as... Figure 6As shown, the first inner sidewall 11 is provided with a plurality of protrusions 14, for example, two protrusions 14 can be provided, which are referred to as the first protrusion 141 and the second protrusion 142 for ease of description. The first protrusion 141 and the second protrusion 142 extend from the first inner sidewall 11 toward the second inner sidewall 12 along the length direction of the housing 10, and the first protrusion 141 and the second protrusion 142 are spaced apart, thus forming a receiving portion 145 between the first protrusion 141 and the second protrusion 142. Correspondingly, the second inner sidewall 12 is also provided with a plurality of protrusions 14, such as the first protrusion 141 and the second protrusion 142, which extend from the second inner sidewall 12 toward the first inner sidewall 11 along the length direction of the housing 10, forming a receiving portion 145 between them.

[0075] like Figure 4a As shown, when the resistor element 20 is placed into the housing 10, the two ends of the core material 21, such as its left and right ends (i.e., the ends without the resistor wire 22 wound around it), are respectively accommodated in the receiving portions 145 on the first inner sidewall 11 and the second inner sidewall 12. Thus, the first protrusion 141 on the first inner sidewall 11 and the second inner sidewall 12 can limit and / or position the resistor element 20 in the Y-axis direction (negative direction), and the second protrusion 142 on the first inner sidewall 11 and the second inner sidewall 12 can limit and / or position the resistor element 20 in the Y-axis direction (positive direction). The receiving portions 145 on the first inner sidewall 11 and the second inner sidewall 12 can restrict the movement of the resistor element 20 along the X-axis direction. Therefore, when filling the housing 10 with sealing material, displacement of the resistor element 20 can be avoided.

[0076] Please continue reading Figure 6 And please combine Figure 4a The first protrusion 141 extends along the length of the housing 10 from the first inner wall 11 and the second inner wall 12, respectively, and contacts the fourth inner wall 16. Similarly, the second protrusion 142 extends along the length of the housing 10 from the first inner wall 11 and the second inner wall 12, respectively, and contacts the third inner wall 15. That is to say, the first protrusion 141 and the second protrusion 142 protrude from the inner wall of the housing 10 at the four corners inside the housing 10.

[0077] Understandably, the first protrusion 141 may not contact the fourth inner wall 16, and the second protrusion 142 may not contact the third inner wall 15, such as... Figure 4b As shown, there is a certain distance between the first protrusion 141 and the fourth inner sidewall 16, and a certain distance between the second protrusion 142 and the third inner sidewall 15. In this structure, the first protrusion 141 and the second protrusion 142 are relatively... Figure 4aThe first protrusion 141 and the second protrusion 142 in the illustrated embodiment are smaller in size, which is beneficial to the weight reduction of the housing 10.

[0078] Further reading is available upon request. Figure 6 The height of the first protrusion 141 and the second protrusion 142 can be the same as the height (depth) of the housing 10, that is, the first protrusion 141 and the second protrusion 142 extend from the inner bottom surface 13 of the housing 10 along the height direction of the housing 10 (e.g., Figure 6 (As shown in the Z-axis direction) extends to be flush with the upper end face of the housing 10.

[0079] It is conceivable that the first protrusion 141 and the second protrusion 142 can be configured to have a certain distance between them and the inner bottom surface 13 of the housing 10, and also a certain distance between them and the upper end surface of the housing 10. That is, the height of the first protrusion 141 and the height of the second protrusion 142 are both less than the height (depth) of the housing 10, thereby further reducing the weight of the housing 10.

[0080] By providing the protrusion 14, this utility model ensures that there is a certain distance between the portion of the core material 21 on which the resistance wire 22 is wound and the inner wall of the housing 10. Figure 4a and Figure 4b As shown, insulation can be ensured without the need for additional plate-shaped insulating substrates or other components for insulation between the core material 21 and the housing 10, thus simplifying the resistor's components and improving production efficiency. Furthermore, since the receiving portion 145 between the protrusions 14 can accommodate the end of the core material 21 as a whole, even if the core material 21 is bent or deformed during assembly, it can be easily accommodated in the receiving portion 145. Because the receiving portion 145 formed between the first protrusion 141 and the second protrusion 142 is not a groove (it has a certain width), even if the core material 21 is deformed, it can be easily placed in the receiving portion 145.

[0081] The aforementioned protrusions 14 can be integrally formed with the housing 10; or the aforementioned protrusions 14 can be connected to the housing 10 by welding, bonding or other means.

[0082] As described above, before placing the resistor element 20 into the housing 10, multiple cores 21 can be integrated with the connecting terminal 30 and a pair of terminal portions 40 into a single unit before being installed into the housing 10, thereby improving assembly and production efficiency.

[0083] like Figure 7As shown, in a modified version of the housing 10, a fixing piece 17 may be provided on the outer side of the housing 10, protruding outward from the outer wall of the housing 10. The fixing piece 17 may be located at a position corresponding to the receiving portion 145, and the fixing piece 17 is provided with a connecting hole 171, which may be a threaded hole or a through hole, and can be used to connect the housing 10 to other components by fasteners such as bolts. For example, it can be connected to a substrate or a cooler, and used as a pre-charging resistor for electric vehicles or hybrid vehicles (not shown). The fixing piece 17 can be constructed in various suitable shapes, and the present invention does not limit this.

[0084] The resistance wire 22 wound on the core material 21 can be NiCr (nickel-chromium) wire, and the number of turns and wire diameter of the resistance wire 22 can be adjusted according to the resistance value.

[0085] Both the connecting terminal 30 and the terminal portion 40 are made of stainless steel. The starting end of the resistance wire 22 is welded to one of the connecting terminals 30 on the core material 21. After the resistance wire 22 is wound from the starting end of the core material 21 to the end of the core material 21, it is welded to another connecting terminal 30 on the core material 21 at the end of the core material 21.

[0086] To connect the resistor elements 20 in series or parallel, the connection terminals 30 on the corresponding resistor elements 20 can be overlapped and soldered. For example... Figure 2 As shown, when connecting the connecting terminals 30 on each core material 21, a portion of the connecting terminals 30 can be overlapped (i.e., two connecting terminals 30 overlap each other) and welded to ensure the stability of the connection.

[0087] For ease of connection, such as Figure 3 As shown, the terminal portion 40 can be constructed as an L-shaped structure, with one part connected to the corresponding connecting terminal 30 and the other part protruding outside the housing 10 along its height direction for easy connection to external devices. Similarly, when connecting the terminal portion 40 to the corresponding connecting terminal 30, a portion of the two can overlap and be soldered to ensure the stability of the connection.

[0088] Example 2

[0089] Based on Embodiment 1 above, a modified Embodiment 2 is provided. The following will mainly describe the differences between Embodiment 2 and Embodiment 1, while the similarities will not be repeated.

[0090] like Figure 8a and Figure 8bAs shown, the housing 10 in this embodiment 2 differs from the housing 10 in embodiment 1 in that the housing 10 in this embodiment 2 also includes a spacer wall 18. The spacer wall 18 can be located between two adjacent resistive elements 20, which is beneficial for heat dissipation of the resistive elements 20, thereby enabling the resistor to meet the requirements of high voltage.

[0091] Specifically, such as Figure 8b As shown, the spacer wall 18 extends along the height direction of the housing 10 on the inner bottom surface 13 of the housing 10. The height of the spacer wall 18 may be less than the height (depth) of the housing 10, and equal to or greater than the height of the core material 21.

[0092] like Figure 8b As shown, each partition wall 18 extends between the receiving portion 145 at the two opposing first inner sidewalls 11 and the receiving portion 145 at the second inner sidewall 12 as described in Embodiment 1 above. Therefore, the partition wall 18 divides the internal space of the housing 10 into a plurality of small spaces, and each resistive element 20 is located in a corresponding small space.

[0093] Understandably, the number of spacers 18 can be related to the number of resistive elements 20. More specifically, the number of spacers 18 is less than the number of resistive elements 20; for example, the number of spacers 18 is one less than the number of resistive elements 20. For instance, when there are three resistive elements 20, the number of spacers 18 is two. Therefore, when each resistive element 20 is inserted into the housing 10, each spacer 18 separates two adjacent resistive elements 20, such as... Figure 8a As shown.

[0094] The partition wall 18 can be made of metal and can be integrally formed with the shell 10. Alternatively, the partition wall 18 can be connected to the shell 10 by welding, bonding or other means.

[0095] Example 3

[0096] Based on Embodiment 1 above, a modified Embodiment 3 is provided. The following will mainly describe the differences between Embodiment 3 and Embodiment 1, while the similarities will not be repeated.

[0097] like Figure 9 and Figure 10a As shown, the difference between the housing 10 in this embodiment 3 and the housing 10 in the above embodiment 1 is that the housing 10 in this embodiment 3 is further provided with a base 19. The base 19 is located at both ends of the inner bottom surface 13 of the housing 10, and abuts against the receiving portion 145 at the first inner sidewall 11 and the receiving portion 145 at the second inner sidewall 12, respectively.

[0098] The base 19 is used to support the bottom end of the resistor element 20. Specifically, when the resistor element 20 is inserted into the housing 10, the bottom end of the resistor element 20 (core 21) (the part without the resistor wire 22) contacts the base 19, that is, the base 19 supports the core 21 from the lower end of the core 21, so that the winding portion 211 on the core 21 with the resistor wire 22 is suspended (when no sealing material is poured) and does not contact the inner bottom surface 13 of the housing 10, thereby ensuring a safe insulating distance between the inner bottom surface 13 of the housing 10 and the resistor element 20.

[0099] like Figure 9 and Figure 10a As shown, the pedestals 19 at both ends of the housing 10 extend between the third inner wall 15 and the fourth inner wall 16 of the housing 10, respectively. That is, the pedestal 19 at the first inner wall 11 is connected to the first protrusion 141 and the second protrusion 142, and the pedestal 19 at the second inner wall 12 is connected to the first protrusion 141 and the second protrusion 142.

[0100] It is conceivable that, such as Figure 10b As shown, the base 19 may not be a single unit, but rather correspond to the resistor element 20, that is, each base 19 supports the bottom end of one of the corresponding resistor elements 20.

[0101] Furthermore, such as Figure 11 As shown, in this embodiment 3, the spacer wall 18 described in embodiment 2 can also be provided inside the housing 10. That is, the spacer wall 18 and the base 19 are provided inside the housing 10 at the same time to meet the requirements of high voltage.

[0102] Example 4

[0103] like Figures 12-19 As shown, the resistor in Embodiment 4 of this utility model includes a housing 10, a resistive element 20, a connecting terminal 30, and a pair of terminal portions 40. Similar to Embodiment 1 above, the housing 10 is a box-shaped structure made of a metallic material (e.g., aluminum) or a ceramic material. The housing 10 includes an inner bottom surface 13 constituting the box-shaped structure and multiple inner sidewalls, which together define the receiving space of the housing 10. The resistive element 20, the connecting terminal 30, and a portion of the pair of terminal portions 40 can be located within this receiving space. Please refer to... Figure 2 and Figure 5 The resistor element 20, the connecting terminal 30, and the pair of terminal portions 40 can be integrated into a single unit and placed together into the housing 10's receiving space; and a sealing material (such as cement or resin) can be injected into the receiving space. The sealing material flows between the various components inside the housing 10, and after curing, it can serve as insulation and fixation.

[0104] Please combine Figure 2 and Figure 5 Similar to Embodiment 1 above, the resistive element 20 includes a core material 21 made of a plate-shaped insulating substrate, wherein the plate-shaped insulating substrate may be, for example, a mica substrate or a ceramic substrate.

[0105] The core material 21 has a long strip structure, and its length direction is consistent with the length direction of the housing 10. The middle part of the core material 21 is a winding part 211, on which a resistance wire 22 is wound. The two ends of the core material 21 are not wound with the resistance wire 22 and are used to connect to the connection terminal 30. The resistance wire 22 can be wound, for example, along the height direction of the core material 21. The core material 21 has an outer edge (i.e., extending along the length direction of the housing 10) extending along the length direction of the housing 10. Figure 5 The core material 21 shown has two ends in the Z-axis direction.

[0106] Please combine Figure 2 and Figure 5 Similar to Embodiment 1 above, the core material 21 is also provided with a plurality of grooves 212, and the connecting terminal 30 can be connected to the core material 21 through the corresponding grooves 212.

[0107] Similar to Embodiment 1 above, the number of resistive elements 20 can be three or more, for example... Figure 13 An example of three resistive elements 20 is shown. Please refer to... Figure 2 and Figure 5 Multiple resistive elements 20 can be electrically connected through the connecting terminal 30. For example, the connecting terminal 30 can connect the ends of multiple resistive elements 20 to each other, thereby connecting multiple resistive elements in series; or the connecting terminal 30 can connect the ends of multiple resistive elements 20 to each other and the ends to each other, thereby connecting multiple resistive elements in series.

[0108] Terminal portions 40 generally appear in pairs, such as Figure 12 As shown, a portion of each of the two terminal portions 40 is located inside the housing 10, while the other portion protrudes outside the housing 10 along its height. Please refer to... Figure 2 and Figure 5 The terminal portion 40 located inside the housing 10 is connected to the corresponding connection terminal 30 inside the housing 10, and the terminal portion 40 can serve as an interface for connecting to external devices.

[0109] Similar to Embodiment 1 above, as Figure 13 As shown, the inner wall of the housing 10 includes the length direction of the housing 10 (e.g., Figure 13 The first inner sidewall 11 and the second inner sidewall 12 are arranged opposite each other in the X-axis direction (as shown) and in the width direction of the housing 10 (e.g., Figure 13The third inner wall 15 and the fourth inner wall 16 are arranged opposite each other in the Y-axis direction (as shown). The first inner wall 11 and the second inner wall 12 can be symmetrically arranged about the center line of the Y-axis direction of the housing 10, and the third inner wall 15 and the fourth inner wall 16 can be symmetrically arranged about the center line of the X-axis direction of the housing 10.

[0110] Unlike Embodiment 1 described above, as Figure 13 and Figure 14a As shown, two protrusions 14 protruding from the inner bottom surface 13 of the housing 10 are respectively provided. For example, the protrusions 14 can be located near the first inner sidewall 11 and near the second inner sidewall 12 respectively, and the protrusions 14 extend between the third inner sidewall 15 and the fourth inner sidewall 16 respectively.

[0111] Each protrusion 14 has multiple recesses 143 formed thereon, such as Figure 17b As shown ( Figure 17b (The connecting terminal 30 and resistance wire 22 are not shown in the middle resistor element 20). Each recess 143 can accommodate the bottom end of the corresponding resistor element 20 (core material 21). The recess 143 can restrict the movement of the resistor element 20 in the Y-axis direction; in addition, the first inner sidewall 11 and the second inner sidewall 12 can restrict the movement of the resistor element 20 (core material 21) in the X-axis direction. Figure 17b The connecting terminal 30 and resistance wire 22 on the resistor element 20 are not shown.

[0112] As described above, the middle portion of the core material 21 is a winding portion 211 on which the resistance wire 22 is wound. Understandably, the end of the core material 21 accommodated in the recess 143 is the portion of the core material 21 on which the resistance wire 22 is not wound.

[0113] Understandably, the recesses 143 constructed on the protrusion 14 divide the protrusion 14 into multiple parts, which can be integrally formed or in a split-structure form.

[0114] The number of recesses 143 on each protrusion 14 is the same as the number of resistive elements 20, that is, each recess 143 on each protrusion 14 is used to accommodate the bottom end of the corresponding resistive element 20. For example Figure 13 An example of three resistive elements 20 is shown, and correspondingly, three recesses 143 are provided on each protrusion 14. For ease of explanation, the recesses 143 on each protrusion 14 are referred to as the first recess 1431, the second recess 1432, and the third recess 1433, respectively. Figure 17b As shown, the first recess 1431 is the recess closest to the fourth inner wall 16, the third recess 1433 is the recess closest to the third inner wall 15, and the second recess 1432 is located between the first recess 1431 and the third recess 1433.

[0115] Understandably, when the number of resistive elements 20 is greater, the number of recesses 143 on each protrusion 14 also increases. For example, multiple second recesses 1432 can be provided between the first recess 1431 and the third recess 1433 to support the corresponding resistive elements 20 respectively.

[0116] By housing each resistor element 20 in a corresponding recess 143, the stability of the housing 10 support can be improved, and the resistor element 20 can be prevented from shifting due to the impact of the sealing material when the sealing material is poured in.

[0117] like Figure 17a As shown, a plurality of recesses 143 are spaced apart along the width direction (i.e., the Y-axis direction) of the housing 10, wherein the depth of each recess 143 is arranged in an alternating manner according to a first depth and a second depth in the width direction of the housing 10.

[0118] Taking the three recesses 143 as an example, such as Figure 17a and Figure 17b As shown, the depth of the first recess 143, which is closest to the fourth inner wall 16, is set as the first depth d1; the depth of the second recess 1432, which is adjacent to the first recess 1431 and located in the middle, is set as the second depth d2; the depth of the third recess 143, which is adjacent to the second recess 1432, is set as the first depth d1, where d2 < d1.

[0119] Similarly, if there are two recesses 143, the depth of the recess 143 closest to the fourth inner wall 16 is set to a first depth d1, and the depth of the recess 143 adjacent to it is set to a second depth d2, and d2 < d1.

[0120] If there are four (or more) recesses 143, the depth of the recess 143 closest to the fourth inner wall 16 is set to a first depth d1, the depth of the adjacent recess 143 is set to a second depth d2, the depth of the next adjacent recess 143 is set to the first depth d1, and the depth of the next adjacent recess 143 is set to the second depth d2, where d2 < d1. That is, the depth of each recess 143 is set from the fourth inner wall 16 along the width direction of the shell 10 in an alternating manner of first depth d1 and second depth d2, so that the depth of each recess 143 presents an alternating deep-shallow-deep-shallow pattern.

[0121] Specifically, the difference (d1-d2) between the first depth d1 and the second depth d2 is related to the plate thickness l of the connecting terminal 30. For example, the aforementioned depth difference (d1-d2) is equal to the plate thickness l of the connecting terminal 30, i.e., (d1-d2) = l. Therefore, it can be understood that after the resistor elements 20 are inserted into the corresponding recesses 143, the resistor element 20 located in the middle position will be higher than the resistor element 20 closer to the inner wall of the housing 10 by the plate thickness l of the connecting terminal 30. By adopting this arrangement, after the resistor element 20 is placed in the corresponding recess 143, the resistor element 20 located in the middle position will be higher than the resistor element 20 closer to the inner wall of the housing 10. Therefore, the connecting terminal 30 on the resistor element 20 can be soldered without bending the connecting terminal 30, thereby simplifying the production process and improving production efficiency.

[0122] Furthermore, although the recess 143 accommodates the bottom end of the resistor element 20, the bottom end (bottom surface) of the resistor element 20 (core material 21) does not contact the bottom surface of the recess 143. There is a certain gap between the two to ensure a safe insulating distance between the resistor element 20 and the inner bottom surface 13 of the housing 10.

[0123] The two sides (sidewalls) of the resistor element 20 can respectively contact the inner side of the corresponding recess 143, that is, the width of the recess 143 can be the same as the width of the core material 21; or the width of the recess 143 is slightly larger than the width of the core material 21, that is, the two sides (sidewalls) of the resistor element 20 can respectively not contact the inner side of the corresponding recess 143, which can restrict the movement of the resistor element 20 and facilitate the insertion of the resistor element 20.

[0124] It should be noted that the depth mentioned above refers to the dimension along the Z-axis in each of the attached figures, while the width (thickness) refers to the dimension along the Y-axis in each of the attached figures.

[0125] In some alternative embodiments, the bottom end of the resistor element 20 is kept from contacting the bottom surface of the recess 143 by providing a pedestal 19 on the inner bottom surface 13 of the housing 10.

[0126] like Figure 15 and Figure 16 As shown, the base 19 can be similar to the base 19 in Embodiment 3 above, that is, the base 19 is located at both ends of the inner bottom surface 13 of the housing 10, and as... Figure 13 As shown, the pedestals 19 at both ends of the housing 10 extend between the third inner wall 15 and the fourth inner wall 16 of the housing 10, respectively. The pedestals 19 at both ends of the housing 10 are located between the first inner wall 11 facing the protrusion 14 and the protrusion 14, and between the second inner wall 12 facing the protrusion 14 and the protrusion 14, respectively.

[0127] The base 19 is higher than the bottom surface of each recess 143. Therefore, when the resistive element 20 is inserted into the corresponding recess 143, the bottom end of the core material 21 can contact the base 19, thus maintaining a certain distance between the bottom end of the core material 21 and the bottom surface of each recess 143. In other words, because the base 19 provides support for the bottom of the core material 21 from below, the core material 21 is not directly inserted into the bottom of the recess 143 when inserted, ensuring a safe insulating distance between the resistive element 20 and the bottom surface of the recess 143 and the inner bottom surface 13 of the housing 10.

[0128] The pedestals 19 at both ends of the housing 10 can respectively abut against the first inner sidewall 11 and the second inner sidewall 12 of the housing 10, such as Figure 13 As shown. Alternatively, the pedestals 19 at both ends of the housing 10 may also have a certain distance between them and the first inner sidewall 11 and the second inner sidewall 12.

[0129] Furthermore, as described above, the first recess 1431 and the third recess 1433 located on both sides are the deepest, while the second recess 1432 located in the middle is the shallowest, so that after the resistive element 20 is inserted into the corresponding recess 143, the resistive element 20 in the middle position is higher. To accommodate this, as... Figure 14b As shown, a boss 191 is provided on the base 19 at a position corresponding to the recess 143 located in the middle position. The boss 191 can support the bottom end of the resistor element 20 located in the middle position, so that it is higher than the other resistor elements 20.

[0130] Figure 14b An example of a recess 143 capable of accommodating three resistive elements 20 is shown, and accordingly, a boss 191 is provided to support the bottom end of the resistive element 20 located within the shallowest recess 143 (second depth d2). It can be understood that if the number of resistive elements 20 is greater, the number of bosses 191 can be provided to support the bottom ends of multiple resistive elements 20 located in intermediate positions respectively.

[0131] In some optional or additional embodiments, the bottom end of the resistor element 20 is prevented from contacting the bottom surface of the recess 143 by providing a rounded corner structure at the transition between the bottom surface and the side surface of the recess 143.

[0132] like Figure 18 and Figure 19As shown, the bottom surface of each recess 143 has a rounded corner structure. Therefore, when the core material 21 is inserted into the corresponding recess 143, the core material 21 is blocked by the rounded corner structure and cannot be directly inserted to the bottom of the corresponding recess 143. This ensures that there is a certain distance between the bottom end of the core material 21 and the bottom surface of the recess 143, so as to ensure a safe insulation distance between it and the inner bottom surface 13 of the housing 10.

[0133] Furthermore, since the rounded corner structure of the recess 143 ensures that the bottom end of the core material 21 does not contact the bottom surface of the recess 143, the aforementioned base 19 may not be required.

[0134] In addition, in order to facilitate the insertion of the core material 21 into the corresponding recess 143, a guide portion 144 is provided at the upper end of the recess 143. The guide portion 144 may be, for example, a sloped surface inclined toward the interior of the recess 143, so as to facilitate the smooth insertion of the core material 21 into the corresponding recess 143.

[0135] Similar to Embodiment 1 described above, a fixing plate 17 may also be provided on the outer side of the housing 10, protruding outward from the outer wall of the housing 10. The fixing plate 17 may be located at a position corresponding to the recess 143, and a connecting hole 171 may be provided on the fixing plate 17. The connecting hole 171 may be a threaded hole or a through hole, which can be used to connect the housing 10 to other components through fasteners such as bolts. The fixing plate 17 may be constructed in various suitable shapes, and this utility model does not limit it in this regard.

[0136] Similar to Embodiment 1 above, the resistance wire 22 wound on the core material 21 can be NiCr (nickel-chromium) wire, and the number of turns and wire diameter of the resistance wire 22 can be adjusted according to the resistance value.

[0137] Similar to Embodiment 1 above, both the connecting terminal 30 and the terminal portion 40 are made of stainless steel. The starting end of the resistance wire 22 is welded to one of the connecting terminals 30 on the core material 21, and the end of the resistance wire 22 is welded to the other connecting terminal 30 on the core material 21.

[0138] Similar to Embodiment 1 above, in order to connect the resistive element 20 in series or parallel, its connection terminals 30 can be overlapped and soldered. For example... Figure 2 As shown, when connecting the connecting terminals 30 on each core material 21, a portion of the connecting terminals 30 can be overlapped (i.e., two connecting terminals 30 overlap each other) and welded to ensure the stability of the connection.

[0139] Similar to Embodiment 1 above, for ease of connection, the terminal portion 40 can be constructed as an L-shaped structure, with one part connected to the corresponding connecting terminal 30 and the other part protruding outside the housing 10 along its height direction, facilitating connection to external devices. Similarly, when connecting the terminal portion 40 to the corresponding connecting terminal 30, a portion of the two can overlap and be soldered to ensure connection stability.

[0140] Similar to Embodiment 2 described above, a spacer wall 18 may also be provided in the housing 10. For example... Figure 14b As shown, the spacer wall 18 can extend along the length of the housing 10 between the two protrusions 14, thereby separating two adjacent resistive elements 20. The spacer wall 18 can be made of a metallic material and can be integrally formed with the housing 10, or connected to the housing 10 by welding, bonding or other means.

[0141] Example 5

[0142] Based on Embodiment 4 above, a modified Embodiment 5 is provided. The following will mainly describe the differences between Embodiment 5 and Embodiment 4, while the similarities will not be repeated.

[0143] like Figure 20 and Figure 21 As shown, the housing 10 in this embodiment 5 differs from the housing 10 in embodiment 4 in that each protrusion 14 in this embodiment 5 has only one recess 143 formed therein. This recess 143 can accommodate the end (bottom) of each resistor element 20, that is, the end of each resistor element 20 is accommodated in the recess 143. Therefore, this embodiment 5 can achieve the restriction of the movement of the resistor element 20 in the X-axis direction and the Y-axis direction with a simpler structure.

[0144] In addition, a platform 19 can also be provided in the housing 10 of this embodiment 5. The platform 19 is higher than the bottom surface of the recess 143, so that when the resistor element 20 is placed in the recess 143, its bottom end cannot contact the bottom surface of the recess 143 due to the support of the platform 19 at both ends of the housing 10, thereby ensuring a safe insulating gap between it and the inner bottom surface 13 of the housing 10.

[0145] Optionally or additionally, the bottom surface of the recess 143 and the side wall may also adopt the rounded corner structure described in Embodiment 4 above. When the resistor element 20 is placed in the recess 143, the rounded corner structure can prevent the bottom ends of the two resistor elements 20 located on the outside from contacting the bottom surface of the recess 143.

[0146] In addition, the partition wall 18 and guide portion 144 structures in Embodiment 4 can also be set in this Embodiment 5. The specific setting method can refer to the method described in the above embodiments.

[0147] It should be noted that the terms "upper", "lower", "bottom", and "end" in this utility model are used for ease of description and understanding, and are described in the orientation shown in the accompanying drawings.

[0148] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A resistor characterized by, include: case; A resistive element, housed within the housing, the resistive element comprising a core material made of a plate-shaped insulating substrate, the core material having a resistive wire wound around it, and the core material having an outer pair of outer edges extending along the length of the housing; A connection terminal is electrically connected to the resistive element; as well as A pair of terminal portions, each of which is electrically connected to a corresponding connection terminal, and a portion of each terminal portion protrudes beyond the housing; The inner bottom surface of the housing is provided with a protrusion protruding from the inner bottom surface, or the inner sidewall of the housing is provided with a protrusion protruding from the inner sidewall, and the protrusions are respectively used to fix the two ends of the resistive element.

2. The electrical resistor of claim 1, wherein The protrusions are located at both ends of the inner bottom surface and extend between the two opposite inner sidewalls of the housing along the width direction of the housing. Each of the protrusions is provided with one or more recesses for accommodating the bottom end of the resistive element. When there is only one recess, the recess accommodates the end of each resistive element. When there are multiple recesses, the number of recesses corresponds one-to-one with the number of resistive elements, so that each recess can accommodate the end of the corresponding resistive element.

3. The electrical resistor of claim 2, wherein The number of recesses is at least three, and each recess is spaced apart along the width direction of the housing. In the width direction of the housing, the depth of each recess is set in an alternating manner of a first depth and a second depth.

4. The electrical resistor of claim 3, wherein The difference between the depth of the outermost recess and the depth of the middle recess is equal to the thickness of the connecting terminal.

5. The electrical resistor of any one of claims 2-4, wherein, A base is also provided on the inner bottom surface of the housing. The base is located between the protrusion and the inner sidewall facing the protrusion. The base is higher than the bottom surface of the recess, so that the bottom end of the resistive element can contact the base and there is a gap between it and the bottom surface of the recess.

6. The electrical resistor of claim 5, wherein The base is provided with a boss, which is provided in correspondence with the middle recess of each recess to support the bottom end of the middle resistor element.

7. The electrical resistor of any one of claims 2-4, wherein, The bottom surface of the recess has a rounded corner structure, which creates a gap between the bottom end of the resistive element and the bottom surface of the recess.

8. The electrical resistor of any one of claims 2-4, wherein, The housing is further provided with a spacer wall that extends along the length of the housing between the protrusions and is located between two adjacent resistive elements.

9. The electrical resistor of claim 1, wherein The protrusions are located on a pair of inner sidewalls of the housing that are parallel to the width direction, and protrude along the length direction of the housing; The protrusions located on the same inner sidewall are spaced apart in the width direction of the housing to accommodate the ends of the resistive elements therebetween.

10. The electrical resistor of claim 9, wherein A platform protruding from the inner bottom surface of the housing is also provided, the platform being used to support the bottom end of the resistive element; and / or The inner bottom surface of the housing is also provided with a partition wall extending along the length direction of the housing, and the partition wall is located between two adjacent resistive elements.

11. The electrical resistor of any one of claims 1-4, wherein, The housing is made of metal and is filled with a sealing material. After the sealing material cures, it can fix the resistive element in the housing.

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