Polytetrafluoroethylene support for fixing color ring resistor of radio frequency microwave product

Abstract

The utility model discloses a polytetrafluoroethylene support for fixing a color ring resistor of a radio frequency microwave product, which relates to the technical field of color ring resistor fixing equipment, and comprises an aluminum alloy cavity fixing surface, a PCB (printed circuit board) is arranged on the aluminum alloy cavity fixing surface, a supporting block is mounted on the PCB, a limiting fixing block is mounted on the supporting block, and the limiting fixing block is fixed on the aluminum alloy cavity fixing surface. The limiting fixing block and the supporting block are fixedly connected and then provided with a matching cavity used for containing and limiting the color ring resistor body, the lower cavity wall of the limiting fixing block and the upper cavity wall of the supporting block abut against the body surface of the limiting color ring resistor body, and the supporting block and the limiting fixing block are combined to form the U-shaped matching cavity. The color ring resistor main body is accurately coated and limited in a three-dimensional space, and the first limiting boss and the second limiting boss are matched with the groove, so that accurate centering between components is ensured, and transverse and longitudinal dislocation is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the technical field of color ring resistor fixing equipment, specifically a polytetrafluoroethylene bracket for fixing color ring resistors in radio frequency microwave products. Background Technology

[0002] In low-frequency high-power coupler circuits for RF microwave products, two color-coded resistors are typically used in series to couple the main signal. The two resistors are placed side by side, with the two resistor leads soldered together at one end, and one resistor lead soldered to the main RF path at the other end, while the other resistor lead is soldered to the coupling output path. The main body of the color-coded resistor needs to be suspended above the main channel. Adjusting its position can change the coupling degree. The position of the main body of the resistor has a significant impact on the coupling degree. After debugging, the main body of the resistor needs to be fixed. The traditional method is to coat it with a large amount of silicone rubber and then dry it for fixation. However, the suspended resistor may shift due to vibration during the coating and drying process, changing its performance. Moreover, this method is not conducive to production, resulting in poor internal processes, and the large amount of solidified silicone rubber is difficult to clean during maintenance. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a polytetrafluoroethylene bracket for fixing color ring resistors in radio frequency microwave products.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A polytetrafluoroethylene (PTFE) bracket for fixing color ring resistors in radio frequency microwave products includes an aluminum alloy cavity fixing surface. A PCB board is disposed on the aluminum alloy cavity fixing surface, a support block is mounted on the PCB board, and a limiting fixing block is mounted on the support block. After the limiting fixing block is fixedly connected to the support block, it has a mating cavity for accommodating and limiting the main body of the color ring resistor. The lower cavity wall of the limiting fixing block and the upper cavity wall of the support block abut against the surface of the main body of the limiting color ring resistor.

[0006] Preferably, the bottom of the limiting and fixing block is provided with a first limiting boss, and the support block is provided with a second limiting groove that cooperates with the first limiting boss.

[0007] Preferably, the support block is provided with a first limiting groove, and the bottom of the limiting fixing block is provided with a second limiting boss that cooperates with the first limiting groove. The second limiting boss is used to restrict the limiting color ring resistor body from disengaging from the mating cavity.

[0008] Preferably, the support block has a second mounting hole, and a second fastener is provided in the second mounting hole. The second fastener passes through the second mounting hole and the PCB board in sequence and is then fastened to the fixing surface of the aluminum alloy cavity.

[0009] Preferably, the limiting and fixing block has a first mounting hole vertically formed, and the support block has a third mounting hole coaxial with the first mounting hole. A first fastener is provided in the first mounting hole, and the first fastener passes through the first mounting hole, the third mounting hole and the PCB board in sequence and is then fastened to the fixing surface of the aluminum alloy cavity.

[0010] Preferably, at least three first resistors are mounted on the PCB board, and a main radio frequency channel is provided between two adjacent first resistors.

[0011] Preferably, a third limiting boss is installed at the bottom of the support block, and the bottom of the third limiting boss passes through the PCB board and is inserted into the positioning hole opened on the fixing surface of the aluminum alloy cavity.

[0012] The beneficial effects of this utility model are:

[0013] 1. The C-shaped cavity formed by the combination of the support block and the limiting fixing block achieves precise three-dimensional coverage and positioning of the color ring resistor body. The cooperation of the first and second limiting bosses and grooves ensures precise alignment between components and effectively prevents lateral and longitudinal misalignment.

[0014] Second, by using the first and second fasteners that penetrate vertically, the limiting and fixing block, the support block, the PCB board and the aluminum alloy cavity are firmly combined into a whole. Combined with the third limiting boss and positioning hole at the bottom, it forms a comprehensive anti-rotation and anti-displacement guarantee. This structure can withstand strong vibration and impact, ensuring that the position of the resistor remains absolutely unchanged in harsh environments.

[0015] Third, this structure changes the installation position of the resistor from manual adjustment to mechanical structure guarantee. Once the assembly is completed, the spatial position and orientation of the resistor relative to the main RF channel are fixed, which fundamentally eliminates the product performance (such as coupling degree) dispersion caused by displacement during manual glue application and drying. Attached Figure Description

[0016] Figure 1 A schematic diagram showing the completed structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Exploded view;

[0018] Figure 3 This is a schematic diagram of the connection structure between the limiting fixing block and the support block of this utility model;

[0019] Figure 4 This utility model Figure 3 Exploded view;

[0020] In the figure, 1 is a limit fixing block; 101 is a first mounting hole; 1a is a first limit boss; 1b is a second limit boss; 2 is a color ring resistor body; 3 is a support block; 301 is a first limit groove; 302 is a second limit groove; 303 is a second mounting hole; 304 is a third mounting hole; 3a is a third limit boss; 4 is a first resistor; 5 is a PCB board; 6 is a main radio frequency channel; 7 is an aluminum alloy cavity fixing surface; 701 is a positioning hole; 8 is a first fastener; 9 is a second fastener; 10 is a mating cavity. Detailed implementation manners

[0021] As Figures 1-4 shown, a polytetrafluoroethylene bracket for fixing a color ring resistor of a radio frequency microwave product is provided, which includes an aluminum alloy cavity fixing surface 7. A PCB board 5 is arranged on the aluminum alloy cavity fixing surface 7. A support block 3 is installed on the PCB board 5. A limit fixing block 1 is installed on the support block 3. The limit fixing block 1 is of an L-shaped structure. After the limit fixing block 1 is fixedly connected to the support block 3, there is a mating cavity 10 for accommodating and limiting the color ring resistor body 2. The lower cavity wall of the limit fixing block 1 abuts against the upper cavity wall of the support block 3 on the body surface of the color ring resistor body 2 for limiting. Specifically, the cooperation between the support block 3 and the limit fixing block 1 replaces the uncontrollable glue, providing a stable, repeatable and maintainable support component for the color ring resistor. The support block 3 serves as a base and is directly fixed on the PCB and the cavity, bearing the main support function. The limit fixing block 1 serves as an upper cover and cooperates with the support block 3 to jointly form a cavity for clamping the resistor. The mating cavity 10 is composed of two upper and lower parts, and its shape and size are precisely designed to ensure that the resistor is firmly restricted in a predetermined position and cannot move or rotate. The mating cavity 10 after the connection between the limit fixing block 1 and the support block 3 is in a "匚" shape, and the notch faces to the right.

[0022] The bottom of the limiting and fixing block 1 is equipped with a first limiting boss 1a, and the support block 3 is provided with a second limiting groove 302 that mates with the first limiting boss 1a. This ensures the longitudinal alignment between the support block 3 and the limiting and fixing block 1 and prevents misalignment. The support block 3 is provided with a first limiting groove 301, and the bottom of the limiting and fixing block 1 is equipped with a second limiting boss 1b that mates with the first limiting groove 301. The second limiting boss 1b is used to limit the color ring resistor body 2 from disengaging from the mating cavity 10. It limits the left and right swaying of the color ring resistor body 2 from the side and prevents it from disengaging from the mating cavity 10. The second limiting boss 1b is located on the top wall of the limiting and fixing block 1 at the groove opening. The support block 3 is provided with a second mounting hole 303, and a second fastener 9 is provided in the second mounting hole 303. After the second fastener 9 passes through the second mounting hole 303, the PCB board 5 is fastened to the aluminum alloy cavity fixing surface 7. The second fastener 9 is used to secure the support block 3, the PCB board 5, and the aluminum alloy cavity fixing surface 7. The aluminum alloy cavity fixing surface 7 is fixed as a whole; the limiting fixing block 1 has a vertically opened first mounting hole 101, and the support block 3 has a third mounting hole 304 coaxial with the first mounting hole 101. The first mounting hole 101 is provided with a first fastener 8. The first fastener 8 passes through the first mounting hole 101, the third mounting hole 304 and the PCB board 5 in sequence and is fastened to the aluminum alloy cavity fixing surface 7. The first fastener 8 is used to fix the limiting fixing block 1, the support block 3, the PCB board 5 and the aluminum alloy cavity fixing surface 7 as a whole; at least three first resistors 4 are installed on the PCB board 5, and there is a main RF channel 6 between two adjacent first resistors 4; a third limiting boss 3a is installed at the bottom of the support block 3. The bottom of the third limiting boss 3a passes through the PCB board 5 and is inserted into the positioning hole 701 opened on the aluminum alloy cavity fixing surface 7, which provides anti-rotation and precise positioning, ensuring that the entire bracket is accurately positioned on the PCB, which is important for the consistency of RF performance.

Claims

1. A polytetrafluoroethylene (PTFE) bracket for fixing color ring resistors in radio frequency microwave products, characterized in that, The device includes an aluminum alloy cavity fixing surface (7), on which a PCB board (5) is provided, on which a support block (3) is installed, and on which a limiting fixing block (1) is installed. After the limiting fixing block (1) is fixedly connected to the support block (3), it has a mating cavity (10) for accommodating and limiting the main body of the color ring resistor. The lower cavity wall of the limiting fixing block (1) and the upper cavity wall of the support block (3) abut against the surface of the limiting color ring resistor main body (2).

2. The polytetrafluoroethylene bracket for fixing color ring resistors in radio frequency microwave products according to claim 1, characterized in that, The bottom of the limiting fixing block (1) is equipped with a first limiting boss (1a), and the support block (3) is provided with a second limiting groove (302) that cooperates with the first limiting boss (1a).

3. A polytetrafluoroethylene bracket for fixing color ring resistors in radio frequency microwave products according to claim 2, characterized in that, The support block (3) has a first limiting groove (301) and the bottom of the limiting fixing block (1) is equipped with a second limiting boss (1b) that cooperates with the first limiting groove (301). The second limiting boss (1b) is used to limit the color ring resistor body (2) from disengaging from the mating cavity (10).

4. A polytetrafluoroethylene bracket for fixing color ring resistors in radio frequency microwave products according to claim 3, characterized in that, The support block (3) has a second mounting hole (303), and a second fastener (9) is provided in the second mounting hole (303). The second fastener (9) passes through the second mounting hole (303) and the PCB board (5) in sequence and is then fastened to the aluminum alloy cavity fixing surface (7).

5. A polytetrafluoroethylene bracket for fixing color ring resistors in radio frequency microwave products according to claim 4, characterized in that, The limiting fixing block (1) has a first mounting hole (101) vertically opened, and the support block (3) has a third mounting hole (304) coaxial with the first mounting hole (101). A first fastener (8) is provided in the first mounting hole (101). The first fastener (8) passes through the first mounting hole (101), the third mounting hole (304) and the PCB board (5) in sequence and is then fastened to the aluminum alloy cavity fixing surface (7).

6. A polytetrafluoroethylene bracket for fixing color ring resistors in radio frequency microwave products according to claim 5, characterized in that, At least three first resistors (4) are mounted on the PCB board (5), and a main radio frequency channel (6) is provided between two adjacent first resistors (4).

7. A polytetrafluoroethylene bracket for fixing color ring resistors in radio frequency microwave products according to claim 6, characterized in that, The support block (3) has a third limiting boss (3a) installed at the bottom. The bottom of the third limiting boss (3a) passes through the PCB board (5) and is inserted into the positioning hole (701) opened on the aluminum alloy cavity fixing surface (7).

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