Low noise amplifier

Abstract

The utility model discloses a low noise amplifier, particularly relates to amplifier technical field, including low noise amplifier main part, low noise amplifier main part bottom end is fixed with the connecting block, connecting block bottom is provided with the rotation subassembly, the rotation subassembly includes the base, and a rotating rod connected with the connecting block is rotationally arranged at the top of the base, a storage cavity is formed in the base, and the bottom end of the rotating rod is rotationally connected with the inner wall of the bottom of the storage cavity. According to the low-noise amplifier, the connecting block and the low-noise amplifier body are supported through the rotating rod, meanwhile, the ratchet wheel is matched with the pawl, and the pawl is meshed with the ratchet wheel all the time under the elastic force action of the torsion spring, so that the ratchet wheel and the low-noise amplifier body are fixed; a worker only needs to rotate the torsion bar to drive the pawl to be separated from the ratchet wheel, the structure is simple, use is very convenient, the angle of the low-noise amplifier body can be adjusted at will, and applicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of amplifiers, in particular to a low-noise amplifier. Background Art

[0002] A low noise amplifier is an electronic device used to reduce noise during signal transmission. Its working principle is to use the internal active bias circuit to adjust the operating current, thereby making a trade-off between operating power consumption and output linearity. Low noise amplifiers are often used in RF front-end modules to improve the noise of signal transmission in RF front-end modules.

[0003] For example, a low-noise amplifier with a prior art publication number of CN220235138U is disclosed. The utility model drives the worm to rotate by turning a knob, so that the worm wheel meshing with the worm rotates, and drives the rotating rod to rotate, thereby driving the cam to rotate, so that the cam rotates to the top of the cooling fan and fits with it, and locks it to prevent it from escaping from the first through hole. Installation and disassembly do not require additional disassembly tools to assist, which is relatively convenient. The worm wheel and the worm cooperate with each other and have a self-locking function, which can lock the cam to improve its locking effect on the cooling fan.

[0004] However, the above-mentioned prior art still has the following problems when in use: when the low-noise amplifier body is installed, due to the different positions of the connecting cables, the angle of the low-noise amplifier body needs to be adjusted; however, after the low-noise amplifier body is fixed, the angle of the low-noise amplifier body cannot be adjusted any more, and it can only be disassembled and reinstalled, which is time-consuming and laborious to use. Based on this, the utility model provides a low-noise amplifier that is easy to adjust the angle. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a low-noise amplifier, which supports the connecting block and the low-noise amplifier body through a rotating rod on a base, and uses a ratchet and a pawl to conveniently fix the low-noise amplifier body. When the low-noise amplifier body needs to be rotated in the opposite direction, the staff only needs to rotate the torsion bar to drive the pawl to separate from the ratchet. The utility model has a simple structure and is very convenient to use. The angle of the low-noise amplifier body can be adjusted at will, and the applicability is better, so as to solve the problems arising from the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-noise amplifier, comprising a low-noise amplifier main body, a connecting block fixedly provided at the bottom end of the low-noise amplifier main body, a rotating assembly provided at the bottom of the connecting block, the rotating assembly comprising a base, a rotating rod rotatably provided at the top of the base and connected to the connecting block, a storage cavity is provided inside the base, the bottom end of the rotating rod is rotatably connected to the inner wall of the bottom of the storage cavity, a ratchet is fixedly provided on the outer wall of the rotating rod, a pawl is engaged at the rear side of the ratchet, the pawl and the ratchet are both arranged in the storage cavity, a torsion spring is fixedly provided between the pawl and the inner wall of the storage cavity for pushing the pawl to engage with the ratchet, a torsion bar is fixedly passed through the inside of the pawl, and the top end of the torsion bar passes through the top of the base.

[0007] In a preferred embodiment, the ratchet is fixedly provided with a limiting ring on the top and bottom, and the top inner wall and the bottom inner wall of the storage cavity are provided with limiting grooves adapted to the limiting rings. The limiting rings are arranged in the limiting grooves, and the two limiting rings are respectively rotated in the two limiting grooves, thereby supporting the ratchet and improving the stability of the ratchet and the rotating rod during rotation.

[0008] In a preferred embodiment, a connection groove matched with the connection block is formed on the top of the rotating rod, and the connection block is inserted into the connection groove, so as to facilitate quick connection of the connection block and the rotating rod.

[0009] In a preferred embodiment, a plurality of spring latches are fixedly embedded in the outer wall of the rotating rod, and the plurality of spring latches are all plugged into the connecting block, so that it is convenient for workers to install and remove the connecting block.

[0010] In a preferred embodiment, a plurality of mounting holes are provided on the top of the base, and the plurality of mounting holes are distributed in a circular array on the top of the base for mounting and fixing the base.

[0011] In a preferred embodiment, the torsion bar is arranged below the low noise amplifier body to prevent the low noise amplifier body from obstructing the torsion bar.

[0012] In a preferred embodiment, a plurality of arc-shaped through holes are provided on the top of the base, and the plurality of arc-shaped through holes are staggered with the plurality of mounting holes. The provision of the plurality of arc-shaped through holes can not only facilitate the staff to grasp the base, but also reduce the weight of the base.

[0013] Technical effects and advantages of the utility model:

[0014] 1. The utility model supports the connecting block and the low-noise amplifier body through the rotating rod on the base, and cooperates with the ratchet and the pawl. The pawl is always engaged with the ratchet under the elastic force of the torsion spring, so as to fix the position of the ratchet, thereby facilitating the fixation of the low-noise amplifier body. When the low-noise amplifier body needs to be rotated in the opposite direction, the staff only needs to rotate the torsion rod to drive the pawl to separate from the ratchet. The utility model has a simple structure and is very convenient to use. The angle of the low-noise amplifier body can be adjusted at will, and the applicability is better.

[0015] 2. By arranging limit rings at the top and bottom of the ratchet, the limit rings rotate in the limit grooves, so as to support the ratchet and make the ratchet and the rotating rod more stable when rotating. A plurality of spring pins are used to fix the rotating rod and the connecting block together, so that the staff can easily disassemble the connecting block and quickly disassemble and repair the main body of the low-noise amplifier. The structure is simple, and the installation and disassembly are very time-saving and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a bottom view of the overall structure of the utility model;

[0018] Figure 3 It is a partial cross-sectional view of the base of the utility model;

[0019] Figure 4 It is a cross-sectional view of the base of the utility model;

[0020] Figure 5 This is a structural diagram of the connecting block and the rotating rod of the utility model.

[0021] The reference numerals are: 1, low noise amplifier body; 2, connecting block; 3, rotating assembly; 4, storage cavity; 5, torsion bar; 6, limiting ring; 7, limiting groove; 8, connecting groove; 9, spring latch; 10, mounting hole; 11, arc-shaped through hole;

[0022] 301. Base; 302. Rotating rod; 303. Ratchet; 304. Ratchet pawl; 305. Torsion spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Refer to the instruction manual Figure 1-5 The utility model provides a low noise amplifier, including a low noise amplifier body 1, a connection block 2 is fixedly provided at the bottom end of the low noise amplifier body 1, a rotating assembly 3 is provided at the bottom of the connection block 2, the rotating assembly 3 includes a base 301, a rotating rod 302 connected to the connection block 2 is rotatably provided at the top of the base 301, a storage cavity 4 is provided inside the base 301, the bottom end of the rotating rod 302 is rotatably connected to the inner wall of the bottom of the storage cavity 4, a ratchet 303 is fixedly sleeved on the outer wall of the rotating rod 302, and a ratchet pawl 304 is meshed at the rear side of the ratchet 303;

[0025] The pawl 304 and the ratchet wheel 303 are both arranged in the storage chamber 4. A torsion spring 305 is fixedly arranged between the pawl 304 and the inner wall of the storage chamber 4, for pushing the pawl 304 to engage with the ratchet wheel 303. A torsion rod 5 is fixedly passed through the inside of the pawl 304, and the top end of the torsion rod 5 passes through the top of the base 301.

[0026] A plurality of mounting holes 10 are provided on the top of the base 301, and the plurality of mounting holes 10 are distributed in a circular array on the top of the base 301, and are used to install and fix the base 301. The torsion bar 5 is arranged below the low-noise amplifier body 1 to prevent the low-noise amplifier body 1 from obstructing the torsion bar 5. A plurality of arc-shaped through holes 11 are provided on the top of the base 301, and the plurality of arc-shaped through holes 11 are staggered with the plurality of mounting holes 10. The plurality of arc-shaped through holes 11 can facilitate the staff to grasp the base 301, and can also reduce the weight of the base 301.

[0027] When in use, the staff first fixes the base 301, and then fixes the connecting block 2 and the rotating rod 302 together, and then according to the wiring position of the low noise amplifier main body 1, the low noise amplifier main body 1 can be rotated to drive the rotating rod 302 to rotate together, and when the ratchet 303 on the rotating rod 302 is engaged with the pawl 304, the pawl 304 is always engaged with the ratchet 303 under the elastic force of the torsion spring 305, and the position of the ratchet 303 is fixed, and then the low noise amplifier main body 1 is rotated to fix the low noise amplifier main body 1 conveniently. When the low noise amplifier main body 1 needs to be rotated in the opposite direction, the staff only needs to rotate the torsion bar 5 to drive the pawl 304 to separate from the ratchet 303. The structure is simple, it is very convenient to use, the angle of the low noise amplifier main body 1 can be adjusted at will, and the applicability is better.

[0028] Refer to the instruction manual Figure 1-5The ratchet 303 is fixed with a limiting ring 6 at the top and bottom, and the top inner wall and the bottom inner wall of the storage chamber 4 are provided with a limiting groove 7 adapted to the limiting ring 6. The limiting ring 6 is arranged in the limiting groove 7. The two limiting rings 6 are respectively rotated in the two limiting grooves 7, so as to support the ratchet 303 and improve the stability of the ratchet 303 and the rotating rod 302 when rotating;

[0029] In addition, a connecting groove 8 adapted to the connecting block 2 is opened on the top of the rotating rod 302, and the connecting block 2 is inserted into the connecting groove 8, which is convenient for quickly connecting the connecting block 2 and the rotating rod 302. A plurality of spring latches 9 are fixedly embedded on the outer wall of the rotating rod 302, and the plurality of spring latches 9 are all plugged into the connecting block 2, which is convenient for the staff to install and disassemble the connecting block 2.

[0030] By arranging limit rings 6 at the top and bottom of the ratchet 303, the limit rings 6 rotate in the limit grooves 7, thereby supporting the ratchet 303 and making the ratchet 303 and the rotating rod 302 more stable when rotating. A plurality of spring latches 9 are used to fix the rotating rod 302 and the connecting block 2 together, so that the staff can easily disassemble the connecting block 2 and quickly disassemble and repair the low-noise amplifier body 1. The structure is simple and the installation and disassembly are very time-saving and labor-saving.

[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A low noise amplifier, comprising a low noise amplifier body (1), characterized in that: A connecting block (2) is fixedly provided at the bottom end of the low noise amplifier body (1); a rotating assembly (3) is provided at the bottom of the connecting block (2); the rotating assembly (3) comprises a base (301); a rotating rod (302) connected to the connecting block (2) is rotatably provided at the top of the base (301); A storage chamber (4) is provided inside the base (301); the bottom end of the rotating rod (302) is rotatably connected to the inner wall of the bottom of the storage chamber (4); a ratchet (303) is fixedly sleeved on the outer wall of the rotating rod (302); a pawl (304) is meshed at the rear side of the ratchet (303); the pawl (304) and the ratchet (303) are both provided in the storage chamber (4); a torsion spring (305) is fixedly provided between the pawl (304) and the inner wall of the storage chamber (4) for pushing the pawl (304) to mesh with the ratchet (303); A torsion bar (5) is fixedly inserted into the ratchet (304), and the top end of the torsion bar (5) passes through the top of the base (301).

2. The low noise amplifier according to claim 1, characterized in that: The ratchet (303) is fixedly provided with a limiting ring (6) at the top and bottom, and the top inner wall and the bottom inner wall of the storage cavity (4) are provided with a limiting groove (7) adapted to the limiting ring (6). The limiting ring (6) is arranged in the limiting groove (7) to improve the stability of the ratchet (303) during rotation.

3. The low noise amplifier according to claim 1, characterized in that: The top of the rotating rod (302) is provided with a connecting groove (8) adapted to the connecting block (2), and the connecting block (2) is inserted into the connecting groove (8).

4. The low noise amplifier according to claim 1, characterized in that: A plurality of spring latches (9) are fixedly embedded in the outer wall of the rotating rod (302), and the plurality of spring latches (9) are all plugged into the connecting block (2), so as to facilitate the disassembly of the connecting block (2).

5. The low noise amplifier according to claim 1, characterized in that: A plurality of mounting holes (10) are provided on the top of the base (301), and the plurality of mounting holes (10) are distributed in a ring array on the top of the base (301).

6. The low noise amplifier according to claim 1, characterized in that: The torsion bar (5) is arranged below the low noise amplifier body (1) to prevent the low noise amplifier body (1) from obstructing the torsion bar (5).

7. The low noise amplifier according to claim 5, characterized in that: A plurality of arc-shaped through holes (11) are provided on the top of the base (301), and the plurality of arc-shaped through holes (11) and the plurality of mounting holes (10) are distributed in an alternating manner, so as to reduce the weight of the base (301).

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