Double-V-shaped chip resistor

Abstract

The utility model discloses a double-V-shaped chip resistor which comprises an alloy substrate, inner electrodes are fixedly connected to the outer sides of the two ends of the alloy substrate, auxiliary electrodes are fixedly connected to the outer portions of the inner electrodes, outer electrodes are fixedly connected to the outer portions of the auxiliary electrodes, and a waterproof breathable film is fixedly connected to the bottom of the alloy substrate. The top of the alloy substrate is fixedly connected with a protection plate, the top of the outer electrode and the top of the protection plate are fixedly connected with a limiting frame, an inner frame is arranged in the limiting frame, and the interior of the limiting frame is coated with silicone grease. The waterproof breathable film, the limiting frame, the silicone grease and the gum type breathable film are matched with one another, the waterproof breathable film is adopted to replace a protection plate at the bottom of a double-V-shaped chip resistor for bottoming, and meanwhile, the limiting frame is arranged at the top of the chip resistor, so that the silicone grease can be coated in a frame, the silicone grease is uniformly distributed on the surface of the resistor, the time consumed for coating the silicone grease is greatly shortened, and the production efficiency is improved. And meanwhile, the heat dissipation effect of the chip resistor is improved, and better heat dissipation of the chip resistor is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of chip resistors, in particular to a double V-type chip resistor. Background Art

[0002] Chip resistors, also known as name card fixed resistors, are a type of metal glass glaze resistor. They are made by mixing metal powder and glass glaze powder and printing them on a substrate using screen printing. They are resistant to moisture and high temperature, have a small temperature coefficient, can greatly save circuit space costs, and make the design more refined.

[0003] Most of the existing dual V-type chip resistors are equipped with a protective plate on the outside. During use, the chip resistors heat up and silicone grease is sometimes applied to the outer surface of the resistor. However, since the chip resistors are generally small in size, it is difficult to evenly apply the silicone grease on the surface of the resistor, and it takes a long time. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A double V-shaped chip resistor comprises an alloy substrate, inner electrodes are fixedly connected to the outer sides of both ends of the alloy substrate, auxiliary electrodes are fixedly connected to the outer sides of the inner electrodes, outer electrodes are fixedly connected to the outer sides of the auxiliary electrodes, a waterproof breathable membrane is fixedly connected to the bottom of the alloy substrate, a protective plate is fixedly connected to the top of the alloy substrate, the outer electrode and the top of the protective plate are fixedly connected to a limit frame, an inner frame is arranged inside the limit frame, silicone grease is coated inside the limit frame, a resistor number is arranged in the inner frame, and V-shaped connecting pins are fixedly connected to both ends of the outer electrode.

[0007] As a preferred solution of the double V-type chip resistor described in the utility model, the inner electrode is copper-plated on the outside, the secondary electrode is nickel-plated on the outside, so as to improve the resistance, and the outer electrode is tin-plated on the outside, so as to enhance the conductivity, wear resistance and solderability of the chip resistor.

[0008] As a preferred solution of a dual V-type chip resistor described in the utility model, the protection plate includes a glass protective layer, and an epoxy resin protective layer is arranged outside the glass protective layer, so as to protect the internal structure of the resistor from being damaged by the external environment and also enhance the electrical performance of the resistor.

[0009] As a preferred solution of the double V-type chip resistor described in the utility model, the distance between the bottom of the waterproof and breathable membrane and the outer bottom of the outer electrode is 0.1 mm, which is convenient for the resistor to dissipate heat.

[0010] As a preferred solution of a double V-type chip resistor described in the utility model, the cross-sections of the waterproof breathable membrane and the protective plate are both U-shaped, and the two ends of the waterproof breathable membrane and the protective plate are fixedly connected accordingly. The waterproof breathable membrane and the protective plate are connected end to end, which is convenient for protecting the internal substrate of the resistor and can isolate external dust, etc., but still maintain a certain air permeability.

[0011] As a preferred solution of the dual V-shaped chip resistor described in the utility model, the two V-shaped connecting pins are oriented upward and downward respectively, which facilitates welding of the chip resistor.

[0012] As a preferred solution of a double V-type chip resistor described in the utility model, the bottom surface of the outer electrode is bonded with a back-adhesive breathable membrane, which can be pre-bonded to the circuit substrate through the back-adhesive breathable membrane before welding, making welding more convenient, the welding position more accurate, and the connection more firm after welding.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model adopts the waterproof breathable membrane to replace the bottom protection plate of the double V-shaped chip resistor as the bottom through the cooperation between the waterproof breathable membrane, the limiting frame, the silicone grease and the adhesive-backed breathable membrane, and at the same time, a limiting frame is provided on the top of the chip resistor, so that the silicone grease can be applied inside the frame, so that the silicone grease is evenly distributed on the surface of the resistor, which greatly shortens the time consumption of applying the silicone grease, and at the same time improves the heat dissipation effect of the chip resistor, so that the chip resistor can better dissipate heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0016] Figure 1 This is the appearance diagram of a dual V-type chip resistor of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of a dual V-type chip resistor of the utility model;

[0018] Figure 3 The utility model is a schematic diagram of the protection plate structure of a double V-shaped chip resistor.

[0019] Legend: 1. Alloy substrate; 2. Inner electrode; 3. Auxiliary electrode; 4. Outer electrode; 5. Waterproof breathable membrane; 6. Protective plate; 601. Glass protective layer; 602. Epoxy resin protective layer; 7. Limiting frame; 8. Inner frame; 9. Silicone grease; 10. Resistor number; 11. V-type connecting pin; 12. Adhesive-backed breathable membrane. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0021] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0022] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] See also Figure 1-3 The utility model provides a double V-type chip resistor, including an alloy substrate 1, inner electrodes 2 are fixedly connected to the outer sides of both ends of the alloy substrate 1, the outer sides of the inner electrodes 2 are fixedly connected to the auxiliary electrodes 3, and the outer sides of the auxiliary electrodes 3 are fixedly connected to the outer electrodes 4, wherein the outer sides of the inner electrodes 2 are copper-plated, the outer sides of the auxiliary electrodes 3 are nickel-plated, so as to improve the resistance, and the outer sides of the external electrodes 4 are tin-plated, so as to enhance the conductivity, wear resistance and weldability of the chip resistor.

[0024] A waterproof breathable membrane 5 is fixedly connected to the bottom of the alloy substrate 1, wherein the distance between the bottom of the waterproof breathable membrane 5 and the outer bottom of the outer electrode 4 is 0.1 mm, which is convenient for the resistor to dissipate heat.

[0025] A protective plate 6 is fixedly connected to the top of the alloy substrate 1. The protective plate 6 includes a glass protective layer 601. An epoxy resin protective layer 602 is arranged outside the glass protective layer 601 to protect the internal structure of the resistor from being damaged by the external environment and to enhance the electrical performance of the resistor.

[0026] The outer electrode 4 and the top of the protection plate 6 are fixedly connected to a limit frame 7, an inner frame 8 is arranged inside the limit frame 7, the inside of the limit frame 7 is coated with silicone grease 9, and a resistor number 10 is arranged in the inner frame 8. Both ends of the outer electrode 4 are fixedly connected to V-shaped connecting pins 11, wherein the two V-shaped connecting pins 11 are oriented upward and downward respectively, so as to facilitate the welding of the chip resistor.

[0027] In this embodiment, the cross-sections of the waterproof breathable membrane 5 and the protective plate 6 are both U-shaped, and the two ends of the waterproof breathable membrane 5 and the protective plate 6 are fixedly connected accordingly. The waterproof breathable membrane 5 and the protective plate 6 are connected end to end, which is convenient for protecting the internal substrate of the resistor and can isolate external dust, etc., but still maintain a certain degree of air permeability.

[0028] In this embodiment, the bottom surface of the outer electrode 4 is bonded with a back-adhesive breathable membrane 12, which can be pre-bonded to the circuit substrate through the back-adhesive breathable membrane 12 before welding, making welding more convenient, the welding position more accurate, and the connection more firm after welding.

[0029] Before installing the chip resistor, the chip resistor is first bonded to the circuit substrate to be installed using the adhesive-backed breathable film 12, and then the V-shaped connecting pins 11 at both ends of the external electrode 4 are welded to the circuit board.

[0030] Since the bottom of the chip resistor is sealed with a waterproof breathable membrane 5 instead of a full protective plate 6, the heat dissipation effect of the chip resistor is stronger. At the same time, a proper amount of silicone grease 9 is applied between the inside of the limit frame 7 and the outside of the inner frame 8 to further improve the heat dissipation effect of the chip resistor.

[0031] When selecting silicone grease 9, avoid using silicone grease 9 containing harmful substances such as acid and alkali to avoid damage to electronic components. At the same time, avoid applying silicone grease 9 to the contact surface of the resistor when applying the coating, thereby avoiding affecting the normal operation of the resistor.

[0032] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, 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 dual V-type chip resistor, comprising an alloy substrate (1), characterized in that: The outer sides of both ends of the alloy substrate (1) are fixedly connected to inner electrodes (2), the outer sides of the inner electrodes (2) are fixedly connected to auxiliary electrodes (3), the outer sides of the auxiliary electrodes (3) are fixedly connected to outer electrodes (4), the bottom of the alloy substrate (1) is fixedly connected to a waterproof and breathable membrane (5), the top of the alloy substrate (1) is fixedly connected to a protective plate (6), the tops of the outer electrodes (4) and the protective plate (6) are fixedly connected to a limit frame (7), the limit frame (7) is internally provided with an inner frame (8), the inner side of the limit frame (7) is coated with silicone grease (9), the inner frame (8) is provided with a resistor number (10), and both ends of the outer electrode (4) are fixedly connected to V-shaped connecting pins (11).

2. A dual V-type chip resistor according to claim 1, characterized in that: The inner electrode (2) is plated with copper on the outside, the auxiliary electrode (3) is plated with nickel on the outside, and the outer electrode (4) is plated with tin on the outside.

3. A dual V-type chip resistor according to claim 1, characterized in that: The protective plate (6) comprises a glass protective layer (601), and an epoxy resin protective layer (602) is arranged outside the glass protective layer (601).

4. A dual V-type chip resistor according to claim 1, characterized in that: The distance between the bottom of the waterproof and breathable membrane (5) and the outer bottom of the outer electrode (4) is 0.1 mm.

5. A dual V-type chip resistor according to claim 1, characterized in that: The waterproof and breathable membrane (5) and the protective plate (6) are both U-shaped in cross section, and the two ends of the waterproof and breathable membrane (5) and the protective plate (6) are correspondingly fixedly connected.

6. A dual V-type chip resistor according to claim 1, characterized in that: The two V-shaped connecting pins (11) are oriented upward and downward respectively.

7. A dual V-type chip resistor according to claim 1, characterized in that: The bottom surface of the outer electrode (4) is bonded with a back-adhesive breathable membrane (12).

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