Digital-to-analog converter convenient to overhaul

Abstract

The utility model discloses a digital-to-analog converter convenient for maintenance, and relates to the technical field of digital-to-analog converters, the digital-to-analog converter convenient for maintenance comprises a bottom plate, the surface of the bottom plate is fixedly connected with four rotating seats, a side cover plate is rotatably connected between two rotating seats at the same side, the surface of the bottom plate is fixedly connected with two connecting plates, and the connecting plates are fixedly connected with the bottom plate. The surfaces, away from the bottom plate, of the two connecting plates are fixedly connected with rotating shafts, the surfaces, on the connecting plates, of the rotating shafts are movably sleeved with torsion springs, the two ends of the torsion springs are fixedly connected with the surfaces of the two top cover plates correspondingly, the top cover plates make contact with the surfaces of the connecting plates, and the side cover plates can be unfolded towards the two sides under the action of the torsion springs. The cover plate of the digital-to-analog converter can be opened in a more labor-saving manner, so that the step of opening the side cover plate is simplified, and the workload of the staff is reduced to the greatest extent.

Description

Technical Field

[0001] The utility model relates to the technical field of digital-to-analog converters, and particularly relates to a digital-to-analog converter convenient for maintenance. Background Technique

[0002] A digital-to-analog converter, also known as a D / A converter, abbreviated as DAC, is a main component in many current electronic devices. For example, modern telecommunication devices include digital processors to perform complex processing while meeting reasonable power and size constraints. In order to wirelessly transmit information, the digital signal output by the digital processor is converted into an analog signal, and this conversion process is performed by the DAC. It is a device that converts digital quantities into analog ones.

[0003] However, currently, the cover of the digital-to-analog converter is generally fixedly connected through screws and holes on the cover, and then the bottom plate is connected to the inner wall of the device through screws. Therefore, when components such as the circuit board inside the housing of the digital-to-analog converter fail, due to the relatively narrow use environment of the digital-to-analog converter, it is not convenient to disassemble its cover, and thus it is not convenient to repair the inside of the digital-to-analog converter.

[0004] Therefore, in view of the above problems, a digital-to-analog converter convenient for maintenance is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to at least solve one of the technical problems existing in the prior art, and provide a digital-to-analog converter convenient for maintenance, which can solve the problems in the background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A digital-to-analog converter convenient for maintenance, including a bottom plate, on the surface of the bottom plate, four rotating seats are fixedly connected, and the four rotating seats are distributed symmetrically in pairs. Between the two rotating seats on the same side, a side cover plate is rotatably connected. The structures on the surfaces of the two side cover plates are the same, and the cross-section of the side cover plate is L-shaped. Inside the bottom plate, two rotating shafts are rotatably connected, and both rotating shafts are located between the bottom plate and the side cover plate. On the surfaces of both rotating shafts, torsion springs are movably sleeved, and the two ends of the torsion springs are respectively fixedly connected to the surfaces of the bottom plate and the side cover plate. On the surface of the bottom plate, two connecting plates are fixedly connected, and the structures on the surfaces of the two connecting plates are the same. On the surfaces of the two connecting plates far from the bottom plate, rotating shafts are also fixedly connected. On the surfaces of the rotating shafts on the connecting plates, two top cover plates are rotatably connected. The two top cover plates are arranged side by side. The opposite sides of the two top cover plates are both stepped. On the surface of the rotating shaft on the connecting plate, a torsion spring is also movably sleeved, and the two ends of the torsion spring are respectively fixedly connected to the surfaces of the two top cover plates, so as to be able to fit with the surface of the horizontal plate on the side cover plate, and the top cover plate contacts the surface of the connecting plate.

[0007] Preferably, a locking bolt is fixedly connected to the surface of the side cover plate, and the side of the locking bolt away from the side cover plate is set to be concave.

[0008] Preferably, a locking seat is fixedly connected to the surface of the connecting plate. The inside of the locking seat is hollow, the inner wall of the locking seat is slidably connected to the surface of the locking bolt, a locking tongue is slidably connected inside the locking seat, one end of the locking tongue close to the connecting plate is arc-shaped, and the surface of one end of the locking tongue close to the connecting plate is slidably connected to the surface of the locking bolt.

[0009] Preferably, two pull rods are fixedly connected to the end of the locking tongue away from the connecting plate. Both pull rods penetrate through the surface of the locking seat and are slidably connected inside the locking seat. A pull bolt is fixedly connected to the end of the pull rod away from the locking seat.

[0010] Preferably, a spring is fixedly connected to the surface of the end of the locking tongue away from the locking bolt, and the end of the spring away from the locking tongue is fixedly connected to the inner wall of the locking seat.

[0011] Preferably, a rotating cylinder is fixedly connected to the surface of the connecting plate. A first convex block is fixedly connected to the inner wall of the rotating cylinder. The cross-section of the first convex block is fan-shaped and the angle is 90 degrees. A limiting shaft is fixedly connected inside the rotating cylinder. The rotating cylinder is fixedly connected to the surface of the bottom plate.

[0012] Preferably, a second convex block is slidably connected to the inner wall of the rotating cylinder. The cross-section of the second convex block is fan-shaped and the angle is 90 degrees. A clamping shaft is fixedly connected to the side of the second convex block away from the rotating cylinder. A circuit board is clamped inside the clamping shaft. The second convex block is slidably connected to the inner wall of the rotating cylinder and the surface of the limiting shaft.

[0013] Preferably, an arc-shaped slide rail is fixedly connected to the surface of the connecting plate. Circular holes are formed in the inner walls of both arc-shaped slide rails. One end of the sliding rod away from the circuit board is slidably connected to the inner wall of the arc-shaped slide rail. Circular holes are also formed in the surface of one end of the sliding rod away from the circuit board. A limiting bead is slidably connected inside the circular hole. The limiting bead is slidably connected to the inner wall of the circular hole on the arc-shaped slide rail. The limiting bead is slidably connected to the inner wall of the arc-shaped slide rail. A spring is also fixedly connected to the surface of the end of the limiting bead away from the arc-shaped slide rail. The spring on the limiting bead is fixedly connected to the inside of the sliding rod at the end away from the limiting bead.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] (1). For this digital-to-analog converter that is convenient for maintenance, the side cover plate can be unfolded to both sides under the action of the torsion spring, thereby removing the obstruction to the line of sight of the staff and facilitating the maintenance personnel to observe the inside of the device. At the same time, it makes it more labor-saving to open the cover plate of the digital-to-analog converter, thus simplifying the steps of opening the side cover plate and minimizing the workload of the staff to the greatest extent.

[0016] (2) The digital-to-analog converter that is convenient for maintenance can restore the position of the locking tongue when the groove on the surface of the locking bolt corresponds to the locking tongue, enabling the locking tongue to slide into the interior of the locking bolt, thereby achieving the locking of the locking bolt and further restricting the position of the side cover plate.

[0017] (3) The digital-to-analog converter that is convenient for maintenance avoids the direct contact between the surface of the circuit board and the surface of the bottom plate, keeping both sides of the circuit board in a suspended state, thereby preventing the surface of the circuit board from being scratched and further damaging the digital-to-analog converter. At the same time, it also facilitates the maintenance personnel to repair the components at various parts of the circuit board, thus extending the service life of the digital-to-analog converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the drawings and embodiments:

[0019] Figure 1 is a schematic structural diagram of a digital-to-analog converter that is convenient for maintenance according to the present invention;

[0020] Figure 2 is a schematic structural diagram of the surface of the bottom plate according to the present invention;

[0021] Figure 3 is a schematic structural diagram of the surface of the top cover plate according to the present invention;

[0022] Figure 4 is a schematic structural diagram of the surface of the circuit board according to the present invention;

[0023] Figure 5 is a schematic internal structure diagram of the locking seat according to the present invention;

[0024] Figure 6 is a schematic internal structure diagram of the sliding rod according to the present invention;

[0025] Figure 7 is a schematic internal structure diagram of the rotating cylinder according to the present invention;

[0026] Figure 8 is according to the present invention Figure 1 magnified schematic diagram at position A;

[0027] Figure 9 is according to the present invention Figure 3 magnified structural schematic diagram at position C.

[0028] Reference numerals: 1, bottom plate; 2, rotating seat; 3, side cover plate; 4, torsion spring; 5, connecting plate; 6, limiting bead; 7, top cover plate; 8, locking bolt; 9, locking seat; 10, locking tongue; 11, spring; 12, pull rod; 13, latch; 14, rotating shaft; 15, clamping shaft; 16, rotating cylinder; 17, sliding rod; 18, circuit board; 19, arc-shaped slide rail; 20, round hole. DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0030] See also Figure 1-9 The utility model provides a technical solution: a digital-to-analog converter that is easy to maintain, including a bottom plate 1, four rotating seats 2 are fixedly connected to the surface of the bottom plate 1, and the four rotating seats 2 are symmetrically distributed in pairs. A side cover plate 3 is rotatably connected between the two rotating seats 2 on the same side. The surfaces of the two side cover plates 3 have the same structure. The cross-section of the side cover plate 3 is L-shaped. The rotating seat 2 can support the side cover plate 3. A locking bolt 8 is fixedly connected to the surface of the side cover plate 3. The side of the locking bolt 8 away from the side cover plate 3 is set to a concave shape to ensure the stability of the device during use. The interior of the bottom plate 1 is rotatably connected to two rotating shafts 14, and the two rotating shafts 14 are located between the bottom plate 1 and the side cover plate 3. The surface of the shaft 14 is movably sleeved with a torsion spring 4, and the two ends of the torsion spring 4 are fixedly connected to the surfaces of the bottom plate 1 and the side cover 3 respectively. The rotating shaft 14 can limit the position of the torsion spring 4 on its surface, so that the torsion spring 4 is in the best working position, ensuring the stable operation of the device. When the side cover 3 is in a closed state, the torsion spring 4 is in a compressed state. The side cover 3 can be expanded to both sides under the action of the torsion spring 4, thereby removing the obstruction to the staff's line of sight, making it convenient for maintenance personnel to observe the inside of the device, and at the same time making it easier to open the cover of the digital-to-analog converter, thereby simplifying the steps of opening the side cover 3 and minimizing the workload of the staff.

[0031] Two connecting plates 5 are fixedly connected to the surface of the bottom plate 1. The structures on the surfaces of the two connecting plates 5 are the same. A locking seat 9 is fixedly connected to the surface of the connecting plate 5. The inside of the locking seat 9 is hollow. The inner wall of the locking seat 9 is slidably connected to the surface of the locking bolt 8. A locking tongue 10 is slidably connected inside the locking seat 9. One end of the locking tongue 10 close to the connecting plate 5 is arc-shaped. The surface of the locking tongue 10 close to the connecting plate 5 is slidably connected to the surface of the locking bolt 8, facilitating the smooth passage of the locking bolt 8 on the surface of the locking tongue 10 when the locking bolt 8 slides on the surface of the locking tongue 10, so that the locking bolt 8 completely slides into the inside of the locking seat 9, and further enabling the concave groove on the locking bolt 8 to correspond to the locking tongue 10, while the locking tongue 10 can block the locking bolt 8, thereby restricting the position of the locking bolt 8, and thus being able to restrict the position of the side cover 3, keeping the two side covers 3 in a closed state. Two pull rods 12 are fixedly connected to the end of the locking tongue 10 away from the connecting plate 5. Both of the two pull rods 12 penetrate the surface of the locking seat 9 and are slidably connected to the inside of the locking seat 9. The pull rod 12 can drive the locking tongue 10 to move. A pull bolt 13 is fixedly connected to the end of the pull rod 12 away from the locking seat 9. In this way, it can be realized that by only pulling the pull bolt 13, the locking tongue 10 can slide inside the locking seat 9, so that the locking tongue 10 slides out of the inside of the locking bolt 8. A spring 11 is fixedly connected to the surface of the locking tongue 10 away from the locking bolt 8. The end of the spring 11 away from the locking tongue 10 is fixedly connected to the inner wall of the locking seat 9. The elastic force of the spring 11 can act on the locking tongue 10, so that when the groove on the surface of the locking bolt 8 corresponds to the locking tongue 10, the position of the locking tongue 10 is restored, enabling the locking tongue 10 to slide into the inside of the locking bolt 8, thereby realizing the locking of the locking bolt 8 and further realizing the restriction of the position of the side cover 3.

[0032] Rotating shafts 14 are also fixedly connected to the surfaces of the two connecting plates 5 away from the bottom plate 1. Two top covers 7 are rotatably connected to the surfaces of the rotating shafts 14 on the connecting plates 5. The two top covers 7 are arranged side by side. The opposite sides of the two top covers 7 are both stepped, so as to be able to fit with the surface of the cross plate on the side cover 3, thereby realizing the restriction of the position of the top cover 7 by the side cover 3. The top cover 7 is in contact with the surface of the connecting plate 5. A torsion spring 4 is also movably sleeved on the surface of the rotating shaft 14 on the connecting plate 5. The two ends of the torsion spring 4 are respectively fixedly connected to the surfaces of the two top covers 7.

[0033] The surface of the connecting plate 5 is fixedly connected with a rotating cylinder 16. The inner wall of the rotating cylinder 16 is fixedly connected with a first convex block 21. The cross-section of the first convex block 21 is fan-shaped and the angle is 90 degrees. A limiting shaft 22 is fixedly connected inside the rotating cylinder 16. The rotating cylinder 16 is fixedly connected with the surface of the bottom plate 1. A second convex block 23 is slidably connected to the inner wall of the rotating cylinder 16. The cross-section of the second convex block 23 is fan-shaped and the angle is 90 degrees. A clamping shaft 15 is fixedly connected to the side of the second convex block 23 away from the rotating cylinder 16. A circuit board 18 is clamped inside the inner wall of the clamping shaft 15. The second convex block 23 is slidably connected to the inner wall of the rotating cylinder 16 and the surface of the limiting shaft 22. When the circuit board 18 drives the clamping shaft 15 to rotate to both sides, the second convex block 23 can be driven to rotate inside the rotating cylinder 16. When the second convex block 23 contacts the first convex block 21, at this time the second convex block 23 rotates 90 degrees, and the clamping shaft 15 stops rotating under the block of the first convex block 21, so as to realize that the circuit board 18 can rotate 90 degrees to both sides respectively under the restriction of the first convex block 21. Sliding rods 17 are fixedly connected to both sides of the surface of the circuit board 18. The internal structures of the two sliding rods 17 are the same, so that a certain distance is maintained between the circuit board 18 and the connecting plate 5, thereby avoiding the direct contact between the internal electrical components and the inner wall of the connecting plate 5 during the movement process, and preventing the circuit board 18 from scratching the electrical components on its surface when moving. Arc-shaped sliding rails 19 are fixedly connected to the surface of the connecting plate 5. Circular holes 20 are opened in the inner walls of the two arc-shaped sliding rails 19. The end of the sliding rod 17 away from the circuit board 18 is slidably connected to the inner wall of the arc-shaped sliding rail 19. Circular holes 20 are also opened on the surface of the end of the sliding rod 17 away from the circuit board 18. A limiting bead 6 is slidably connected inside the inner wall of the circular hole 20. The limiting bead 6 is slidably connected to the inner wall of the circular hole 20 on the arc-shaped sliding rail 19. The limiting bead 6 is slidably connected to the inner wall of the arc-shaped sliding rail 19. A spring 11 is also fixedly connected to the surface of the end of the limiting bead 6 away from the arc-shaped sliding rail 19. The spring 11 on the limiting bead 6 away from the limiting bead 6 is fixedly connected to the inside of the sliding rod 17.

[0034] Furthermore, the base plate 1 is fixed inside the device. When the mainboard inside the internal digital-to-analog converter fails, the maintenance personnel only need to pull the pull bolt 13. At this time, the pull bolt 13 can drive the two pull rods 12 to slide outward inside the locking seat 9. Then, the sliding of the two pull rods 12 drives the lock tongue 10 to slide inside the locking seat 9 and the locking bolt 8, so that the lock tongue 10 slides out from the inside of the locking bolt 8, thereby releasing the restriction of the lock tongue 10 on the locking bolt 8. At this time, the spring 11 inside the locking seat 9 contracts under the squeezing of the lock tongue 10 and has a certain elastic force, and then the rotating shaft inside the base plate 1 14 rotates under the elastic force of the torsion spring 4 sleeved on its surface. At this time, the side cover plates 3 on both sides rotate between the rotating seats 2 under the elastic force of the torsion spring 4 on the surface of the bottom plate 1, so that the side cover plates 3 on both sides are unfolded to both sides. At this time, the surfaces of the upper horizontal plates of the side cover plates 3 on both sides are separated from the surfaces of the steps on the opposite sides of the two top cover plates 7, respectively, thereby releasing the restriction of the side cover plates 3 on the position of the top cover plates 7. Subsequently, the two top cover plates 7 flip upward under the elastic force of the torsion spring 4, thereby reducing the obstruction of the top plate to the maintenance personnel's line of sight, and providing an operating space for the maintenance personnel to inspect the internal electrical components.

[0035] Then the staff slightly turns the circuit board 18, and the circuit board 18 will drive the clamping shaft 15 to rotate inside the rotating drum 16. At this time, the clamping shaft 15 is restricted by the raised part inside the rotating drum 16 and can rotate 90 degrees to both sides with the circuit board 18, thereby avoiding direct contact between the surface of the circuit board 18 and the surface of the bottom plate 1, and making both sides of the circuit board 18 suspended, thereby preventing the surface of the circuit board 18 from being scratched, thereby causing further damage to the digital-to-analog converter, and also facilitating the maintenance personnel to inspect the components of various parts of the circuit board 18, thereby reducing the workload of the maintenance personnel and thereby increasing the service life of the digital-to-analog converter.

[0036] At the same time, the ends of the two sliding rods 17 away from the circuit board 18 can slide on the inner wall of the arc-shaped slide rail 19, and then the limiting beads 6 inside the sliding rod 17 will slide out of the round holes 20 inside the arc-shaped slide rail 19, so as to limit the position of the circuit board 18, and the limiting beads 6 inside the sliding rod 17 will be squeezed by the inner wall of the arc-shaped slide rail 19, so that the limiting beads 6 slide into the interior of the sliding rod 17. At this time, the spring 11 inside the sliding rod 17 will be squeezed by the limiting beads 6 and shrink, so as to have a certain elastic force. In this way, the limiting beads 6 will no longer limit the sliding rod 17, so that it is convenient for maintenance personnel to pull the circuit board 18, and it is convenient for maintenance personnel to check the digital-to-analog converter and judge the fault, which speeds up the equipment maintenance and improves the efficiency of troubleshooting.

[0037] Working principle: The circuit board 18 will drive the clamping shaft 15 to rotate inside the rotating drum 16. At this time, the clamping shaft 15 is restricted by the raised part inside the rotating drum 16 and can rotate 90 degrees to both sides with the circuit board 18, thereby avoiding direct contact between the surface of the circuit board 18 and the surface of the bottom plate 1, so that both sides of the circuit board 18 are in a suspended state, thereby preventing the surface of the circuit board 18 from being scratched, thereby causing further damage to the digital-to-analog converter, and at the same time, it is convenient for maintenance personnel to repair components of various parts of the circuit board 18, thereby reducing the workload of maintenance personnel and thus increasing the service life of the digital-to-analog converter. At the same time, the ends of the two sliding rods 17 away from the circuit board 18 can be in an arc shape. The inner wall of the slide rail 19 slides, and then the limiting bead 6 inside the slide rod 17 slides out of the circular hole 20 inside the arc-shaped slide rail 19, thereby limiting the position of the circuit board 18, and the limiting bead 6 inside the slide rod 17 is squeezed by the inner wall of the arc-shaped slide rail 19, so that the limiting bead 6 slides into the interior of the slide rod 17. At this time, the spring 11 inside the slide rod 17 is squeezed by the limiting bead 6 and contracts, thereby having a certain elastic force. In this way, the limiting bead 6 no longer limits the slide rod 17, thereby facilitating the maintenance personnel to pull the circuit board 18, facilitating the maintenance personnel to check the digital-to-analog converter and judge the fault, speeding up the equipment maintenance and improving the efficiency of troubleshooting.

[0038] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A digital-to-analog converter that is easy to maintain, comprising a base plate (1), characterized in that: The surface of the bottom plate (1) is fixedly connected with four rotating seats (2), the four rotating seats (2) are symmetrically distributed in pairs, a side cover plate (3) is rotatably connected between two rotating seats (2) on the same side, the surfaces of the two side cover plates (3) have the same structure, the cross section of the side cover plate (3) is L-shaped, the bottom plate (1) is internally rotatably connected with two rotating shafts (14), the two rotating shafts (14) are both located between the bottom plate (1) and the side cover plate (3), the surfaces of the two rotating shafts (14) are movably sleeved with torsion springs (4), the two ends of the torsion springs (4) are respectively fixedly connected to the surfaces of the bottom plate (1) and the side cover plate (3), and the surface of the bottom plate (1) is fixedly connected with Two connecting plates (5) have the same surface structure. The surfaces of the two connecting plates (5) away from the bottom plate (1) are also fixedly connected with a rotating shaft (14). The surface of the rotating shaft (14) on the connecting plate (5) is rotatably connected with two top cover plates (7). The two top cover plates (7) are arranged side by side. The opposite sides of the two top cover plates (7) are both stepped. The surface of the rotating shaft (14) on the connecting plate (5) is also movably sleeved with a torsion spring (4). The two ends of the torsion spring (4) are respectively fixedly connected with the surfaces of the two top cover plates (7), so that they can fit with the surface of the upper horizontal plate of the side cover plate (3). The top cover plate (7) contacts the surface of the connecting plate (5).

2. The digital-to-analog converter convenient for maintenance according to claim 1, characterized in that: A locking bolt (8) is fixedly connected to the surface of the side cover plate (3), and a side of the locking bolt (8) away from the side cover plate (3) is arranged in a concave shape.

3. The digital-to-analog converter that is easy to maintain according to claim 2, characterized in that: A locking seat (9) is fixedly connected to the surface of the connecting plate (5), the interior of the locking seat (9) is hollow, the inner wall of the locking seat (9) is slidably connected to the surface of the locking bolt (8), a locking tongue (10) is slidably connected to the interior of the locking seat (9), one end of the locking tongue (10) close to the connecting plate (5) is in an arc shape, and the surface of the locking tongue (10) close to one end of the connecting plate (5) is slidably connected to the surface of the locking bolt (8).

4. The digital-to-analog converter convenient for maintenance according to claim 3, characterized in that: The end of the locking tongue (10) away from the connecting plate (5) is fixedly connected to two pull rods (12), and both pull rods (12) penetrate the surface of the locking seat (9) and are slidably connected to the inside of the locking seat (9), and the end of the pull rod (12) away from the locking seat (9) is fixedly connected to a pull bolt (13).

5. The digital-to-analog converter that is easy to maintain according to claim 3, characterized in that: A spring (11) is fixedly connected to the surface of the end of the lock tongue (10) away from the locking bolt (8), and the end of the spring (11) away from the lock tongue (10) is fixedly connected to the inner wall of the locking seat (9).

6. The digital-to-analog converter convenient for maintenance according to claim 1, characterized in that: The surface of the connecting plate (5) is fixedly connected to a rotating drum (16), the inner wall of the rotating drum (16) is fixedly connected to a protrusion 1 (21), the cross section of the protrusion 1 (21) is fan-shaped and the angle is 90 degrees, the interior of the rotating drum (16) is fixedly connected to a limiting axis (22), and the rotating drum (16) is fixedly connected to the surface of the bottom plate (1).

7. The digital-to-analog converter convenient for maintenance according to claim 6, characterized in that: The inner wall of the rotating drum (16) is slidably connected with a second protrusion (23), the cross section of the second protrusion (23) is fan-shaped and the angle is 90 degrees, the side of the second protrusion (23) away from the rotating drum (16) is fixedly connected with a clamping shaft (15), the inner wall of the clamping shaft (15) is clamped with a circuit board (18), and the second protrusion (23) is slidably connected with the inner wall of the rotating drum (16) and the surface of the limiting shaft (22).

8. The digital-to-analog converter that is easy to maintain according to claim 1, characterized in that: The surface of the connecting plate (5) is fixedly connected with an arc-shaped slide rail (19), and the inner walls of the two arc-shaped slide rails (19) are both provided with round holes (20). The end of the sliding rod (17) away from the circuit board (18) is slidably connected to the inner wall of the arc-shaped slide rail (19), and the surface of the end of the sliding rod (17) away from the circuit board (18) is also provided with a round hole (20). The inner wall of the round hole (20) is slidably connected to a limiting bead (6), and the limiting bead (6) is slidably connected to the inner wall of the round hole (20) on the arc-shaped slide rail (19). The limiting bead (6) is slidably connected to the inner wall of the arc-shaped slide rail (19), and the surface of the limiting bead (6) away from the arc-shaped slide rail (19) is also fixedly connected with a spring (11), and the end of the spring (11) on the limiting bead (6) away from the limiting bead (6) is fixedly connected to the inside of the sliding rod (17).

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