Multi-resistance-value conversion sampling resistor and electronic device
By designing a sampling resistor with multiple resistance values, and utilizing a support column, support plate, and guide column structure to achieve flexible switching of sampling positions, the high cost and material waste problems of multi-level power supply sampling in the prior art are solved. This achieves resistance value switching without power interruption and improves the adaptability and efficiency of the sampling resistor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN YEZHAN ELECTRONICS
- Filing Date
- 2025-04-08
- Publication Date
- 2026-04-21
AI Technical Summary
In the existing technology, sampling resistors with fixed resistance values require the addition of different modules and sampling resistors when sampling from multiple power supplies, and the power supply needs to be disconnected when switching, resulting in high production costs and material waste.
Design a sampling resistor with multiple resistance values. By mounting a resistor chip and leads on a fixed structure and combining it with a movable sampling structure, resistance value switching can be achieved without disconnecting the power supply. The sampling position switching is achieved by using a support column, support plate and guide column structure.
It enables flexible switching of sampling position and resistance value without power interruption, reducing production costs and material waste, and improving the adaptability and efficiency of sampling resistor.
Smart Images
Figure CN224154212U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic technology, and in particular to a sampling resistor and electronic device for multi-value conversion. Background Technology
[0002] Sampling resistors are used for both current and voltage sampling. For current sampling, a smaller resistor is connected in series; for voltage sampling, a larger resistor is connected in parallel. Sampling resistors are generally categorized as through-hole resistors or surface-mount resistors, depending on the specific circuit board requirements.
[0003] Most commonly used sampling resistors on the market have fixed resistance values. If the client needs to perform multi-level power sampling, different modules and sampling resistors need to be added. Even if there is a resistance value switching function, multiple resistor chips are integrated into the product internally, and when switching, the power supply and voltage need to be disconnected together before connecting to another resistor.
[0004] The above content is only used to help understand the technical solution of this utility model and does not represent an admission that the above content is prior art. Utility Model Content
[0005] The main purpose of this invention is to provide a sampling resistor and electronic device for multi-resistance conversion, which aims to solve the above-mentioned problems in the prior art.
[0006] To achieve the above objectives, this utility model provides a multi-resistance conversion sampling resistor, which includes:
[0007] Fixed structure;
[0008] A resistance structure is mounted on the fixed structure and has a resistor chip, a first lead and a second lead respectively connected to the resistor chip. The first lead and the second lead are used for current inflow and current outflow, respectively. The resistor chip has multiple sampling bits.
[0009] The sampling structure is located above the resistance structure and can move in the vertical direction to select and contact two of the sampling bits to switch the resistance value.
[0010] Preferably, in the multi-resistance conversion sampling resistor, the sampling structure includes:
[0011] A support column is provided on the fixed structure;
[0012] A support plate, movably mounted on the support column in the vertical direction, is positioned above the resistance structure and extends laterally; and...
[0013] Two guide posts are movably mounted on the support plate and extend toward the resistance structure.
[0014] Preferably, in the multi-resistance conversion sampling resistor, the support plate has a contact position and a separation position, wherein, when the support plate is in the contact position, the two guide posts are in contact with the sampling position; when the support plate is in the separation position, the two guide posts are separated from the sampling position.
[0015] The sampling structure also includes an elastic element disposed between the fixed structure and the support plate, which is used to reset the support plate from the contact position to the separation position.
[0016] Preferably, in the multi-resistance conversion sampling resistor, the outer periphery of the support column has an external thread, and the external thread is threadedly connected to the fixed structure;
[0017] When the support plate moves to the contact position, the support column secures the support plate with a nut.
[0018] Preferably, in the multi-resistance conversion sampling resistor, the support column is disposed through the support plate, and the nut is disposed on the side of the support plate opposite to the fixing structure;
[0019] When the support plate moves to the contact position, the nut is screwed to the position corresponding to the support column and the support plate is pressed tight.
[0020] Preferably, in the multi-resistance conversion sampling resistor, the sampling structure further includes a rotating plate, which is rotatably mounted on the support plate;
[0021] The two guide pillars are mounted on the rotating plate.
[0022] Preferably, in the multi-resistance conversion sampling resistor, the resistance structure further includes an insulating structure, and the resistor chip is mounted on the insulating structure.
[0023] Preferably, in the sampling resistor for multi-value conversion, the insulating structure is a ceramic sheet.
[0024] Preferably, in the sampling resistor for multi-value conversion, the number of sampling bits is four, and the four sampling bits are set at intervals.
[0025] To achieve the above objectives, the present invention also provides an electronic device, which includes a sampling resistor for multi-value conversion as described above.
[0026] This utility model has at least the following beneficial effects:
[0027] This invention is mounted on the fixed structure via a resistance structure and includes a resistor chip and a first lead and a second lead connected to the resistor chip. The first lead and the second lead are used for current inflow and outflow, respectively. The resistor chip has multiple sampling positions. The sampling structure is located above the resistance structure and can move vertically to select and contact two of the sampling positions to switch the resistance value. In this way, the sampling structure can adjust the sampling position and the sampling resistance value, and switch the sampling position while switching the resistance value.
[0028] Furthermore, this invention uses the same chip for different resistance values, reducing production costs and material waste caused by dealing with different resistance values.
[0029] Furthermore, since this invention only changes the sampling point of the product, it does not require disconnecting the power supply path; the resistance value can be changed simply by rotating the knob to change the sampling point. Attached Figure Description
[0030] Figure 1 A schematic diagram of the first embodiment of the sampling resistor for multi-value conversion provided by this utility model;
[0031] Figure 2 for Figure 1 Top view;
[0032] Figure 3 A schematic diagram of a second embodiment of the sampling resistor for multi-resistance conversion provided by this utility model;
[0033] Figure 4 for Figure 3 Top view;
[0034] Figure 5 for Figure 1 A schematic diagram of the middle part of the structure.
[0035] Serial Number name Serial Number name 100 Sampling resistor for multi-value conversion 31 Support column 1 Fixed structure 32 support plate 2 resistance structure 33 Guide post 21 Resistor chip 34 elastic element 22 First lead 35 Rotating plate 23 Second lead 36 knob 24 sampling bits 4 Nut 3 Sampling structure
[0036] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0037] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0038] In this embodiment of the invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0039] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0040] In this embodiment of the invention, the term "multiple" refers to two or more, and other quantifiers are similar.
[0041] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.
[0042] This invention provides a sampling resistor with multi-value conversion; please refer to [link / reference]. Figures 1 to 5 The multi-resistance conversion sampling resistor 100 includes a fixed structure 1, a resistance structure 2, and a sampling structure 3. The resistance structure 2 is mounted on the fixed structure 1 and has a resistor chip 21 and a first lead 22 and a second lead 23 connected to the resistor chip 21. The first lead 22 and the second lead 23 are used for current inflow and current outflow, respectively. The second lead 23 has multiple sampling positions 24 on the resistor chip 21. The sampling structure 3 is located above the resistance structure 2 and can move in the vertical direction and select to contact two of the sampling positions 24 to switch the resistance value.
[0043] This utility model is mounted on the fixed structure 1 via a resistance structure 2, and has a resistor chip 21, and a first lead 22 and a second lead 23 respectively connected to the resistor chip 21. The first lead 22 and the second lead 23 are used for current inflow and outflow, respectively. The resistor chip 21 has multiple sampling positions 24 on the second lead 23. The sampling structure 3 is located above the resistance structure 2, and can move in the vertical direction to select and contact two of the sampling positions 24 to switch the resistance value. In this way, the sampling structure 3 can adjust the sampling position and the sampling resistance value, and switch the sampling position 24 at the same time as switching the resistance value.
[0044] The fixing structure 1 is used to fix the resistance structure 2. When the contact surface between the resistance structure 2 and the fixing structure 1 is an insulating surface, the fixing structure 1 can be an insulating component or a non-insulating component, depending on the specific needs. In some embodiments, a structure that facilitates heat dissipation can be selected, such as an aluminum-based heat sink. When the contact surface between the resistance structure 2 and the fixing structure 1 is a non-insulating surface, the fixing structure 1 needs to be an insulating component.
[0045] The resistance structure 2 can rotate around the fixed structure 1. In some embodiments, the center position of the resistance structure 2 can be rotated around the fixed structure 1. In other embodiments, other positions of the resistance structure 2 can be rotated around the fixed structure 1, which can be determined according to actual needs. When the resistance structure 2 rotates, the sampling position 24 of the sampling structure 3 and the sampled resistance value can be changed when it moves downward.
[0046] The sampling structure 3 includes a support column 31, a support plate 32, and two guide columns 33. The support column 31 is mounted on the fixed structure 1. The support plate 32 is movably mounted on the support column 31 in the vertical direction. The support plate 32 is positioned above the resistance structure 2 and extends horizontally. The two guide columns 33 are movably mounted on the support plate 32 and extend towards the resistance structure 2. The support column 31 serves as a guide, restricting the vertical movement path of the support plate 32. The number of support columns 31 can be two or other numbers, depending on the needs. When the support plate 32 moves downward along the support column 31, the guide columns 33 can contact the sampling position 24; when the support plate 32 moves upward along the support column 31, the guide columns 33 can separate from the sampling position 24. The support plate 32 has a contact position and a separation position. In the contact position, the two guide posts 33 are in contact with the sampling position 24; in the separation position, the two guide posts 33 are separated from the sampling position 24. Figure 1 The support plate 32 shown is in the separated position. Figure 3 The support plate 32 is shown in the contact position.
[0047] In some embodiments, the sampling structure 3 further includes a rotating plate 35, which is rotatably mounted on the support plate 32; the two guide posts 33 are mounted on the rotating plate 35. Rotating the rotating plate 35 allows adjustment of the position of the guide posts 33, thereby adjusting the sampling position and the sampling resistance. In specific implementations, a knob 36 can be provided on the rotating plate 35, such as... Figures 1 to 4 As shown. Figure 1 and Figure 2 The illustration shows one embodiment of rotating knob 36; Figure 3 and Figure 4This illustration shows another embodiment of rotating knob 36. In this embodiment, Figure 3 and Figure 4 The sampled value is the effective resistance value between sampling bit A and sampling bit D.
[0048] To facilitate the support plate 32, it can be fixed by a locking member. In some embodiments, it can also be supported by an elastic member 34. In some embodiments, the sampling structure 3 further includes an elastic member 34, which is disposed between the fixing structure 1 and the support plate 32, and is used to reset the support plate 32 from the contact position to the separation position. When the elastic member 34 is in its natural state, it can support the support plate 32; when the elastic member 34 is in a compressed state, it can be used to reset the support plate 32. In some embodiments, the elastic member 34 is a spring; in other embodiments, the elastic member 34 can also be other structures with elastic properties.
[0049] Furthermore, the support column 31 has external threads on its periphery, which are threadedly connected to the fixing structure 1. When the support plate 32 moves to the contact position, the support column 31 fixes the support plate 32 in place by the nut 4, thus ensuring stable sampling by the support column 31 on the support plate 32. More specifically, the support column 31 passes through the support plate 32, and the nut 4 is located on the side of the support plate 32 opposite to the fixing structure 1. When the support plate 32 moves to the contact position, the nut 4 is screwed to the position corresponding to the support column 31 and presses the support plate 32 tightly.
[0050] The resistance structure 2 also includes an insulating structure, on which the resistive chip 21 is mounted. In some embodiments, the insulating structure is a ceramic sheet, which ensures the insulation of the product.
[0051] The number of the plurality of sampling bits 24 is four, and the four sampling bits 24 are arranged at intervals. For example Figure 5 As shown, sampling bit 24 includes A, B, C, and D.
[0052] This invention also provides an electronic device comprising the aforementioned multi-resistance conversion sampling resistor 100. Embodiments of this electronic device include embodiments of the aforementioned multi-resistance conversion sampling resistor 100; the beneficial effects of the aforementioned multi-resistance conversion sampling resistor 100 can be applied to this electronic device.
[0053] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the protection scope of this utility model.
Claims
1. A multi-resistance converted sampling resistor, characterized by, include: Fixed structure; A resistance structure is mounted on the fixed structure and has a resistor chip, a first lead and a second lead respectively connected to the resistor chip. The first lead and the second lead are used for current inflow and current outflow, respectively. The resistor chip has multiple sampling bits. The sampling structure is located above the resistance structure and can move in the vertical direction to select and contact two of the sampling positions to switch the resistance value.
2. The multiple resistance converted sampling resistor of claim 1, wherein, The sampling structure includes: A support column is provided on the fixed structure; A support plate, movably mounted on the support column in the vertical direction, is positioned above the resistance structure and extends laterally; and... Two guide posts are movably mounted on the support plate and extend toward the resistance structure.
3. The multiple resistance converted sampling resistor of claim 2, wherein, The support plate has a contact position and a separation position, wherein when the support plate is in the contact position, the two guide posts are in contact with the sampling position; when the support plate is in the separation position, the two guide posts are separated from the sampling position. The sampling structure also includes an elastic element disposed between the fixed structure and the support plate, which is used to reset the support plate from the contact position to the separation position.
4. The multiple resistance converted sampling resistor of claim 3, wherein, The outer periphery of the support column has external threads, which are threadedly connected to the fixing structure. When the support plate moves to the contact position, the support column secures the support plate with a nut.
5. The multiple resistance converted sampling resistor of claim 4, wherein, The support column passes through the support plate, and the nut is located on the side of the support plate opposite to the fixing structure. When the support plate moves to the contact position, the nut is screwed to the position corresponding to the support column and the support plate is pressed tight.
6. The multiple resistance converted sampling resistor of claim 2, wherein, The sampling structure also includes a rotating plate, which is rotatably mounted on the support plate; The two guide pillars are mounted on the rotating plate.
7. The multiple resistance converted sampling resistor of claim 1, wherein, The resistance structure also includes an insulating structure, and the resistive chip is mounted on the insulating structure.
8. The multiple resistance converted sampling resistor of claim 7, wherein, The insulating structure is a ceramic sheet.
9. The multiple resistance converted sampling resistor of claim 1, wherein, The number of the multiple sampling bits is four, and the four sampling bits are set at intervals.
10. An electronic device, characterized by This includes the sampling resistor for multi-resistance conversion as described in any one of claims 1 to 9.