Sound level meter support

Abstract

The utility model discloses a sound level meter support, and belongs to the field of sound level meters, the sound level meter support comprises a support seat, a plurality of support rods, a main rod and a placing table, the plurality of support rods are hinged to the support seat, the main rod is fixedly connected to one side wall, far away from the support rods, of the support seat, a rotating shaft is fixedly connected to the placing table, and the rotating shaft is fixedly connected to the placing table. The rotating shaft is rotationally connected to one end, far away from the support, of the main rod, and the sound level meter is fixedly placed on the placing table; a telescopic rod is arranged in the supporting rod in a telescopic mode, a bolt used for fixing the telescopic rod is arranged on the supporting rod, one end of the telescopic rod is fixedly connected with an abutting plate, the abutting plate abuts against the ground surface, a drill bit is arranged in the telescopic rod in a telescopic mode, and the drill bit penetrates through the abutting plate to be inserted into the soft ground. A fixing assembly used for fixing the drill bit is arranged in the abutting block. The support has the effects that the stability of the support is improved, and the probability that the support topples over is reduced.

Description

Technical Field

[0001] This application relates to the technical field of sound level meters, and particularly to a sound level meter bracket. Background Art

[0002] A sound level meter is the most basic noise measurement instrument. It is an electronic instrument, but different from objective electronic instruments such as voltmeters. When converting a sound signal into an electrical signal, it can simulate the time characteristics of the human ear's response speed to sound waves; it has characteristics of different sensitivities and intensity characteristics that change with different loudness levels. A sound level meter is a subjective electronic instrument. In the actual use process of existing sound level meters, the sound level meter needs to be placed at a certain height for monitoring, so a bracket is required to support the sound level meter.

[0003] Most existing brackets for sound level meters have very poor stability when dealing with pitted ground and are prone to tipping over. Utility Model Content

[0004] In order to deal with ground conditions of different flatness and softness / hardness, improve the stability of the bracket, and reduce the possibility of the bracket tipping over, this application provides a sound level meter bracket.

[0005] The sound level meter bracket provided by this application adopts the following technical solution:

[0006] The sound level meter bracket includes a support, a plurality of support rods, a main rod, and a placement platform. The plurality of support rods are hinged to the support. The main rod is fixedly connected to a side wall of the support away from the support rods. A rotating shaft is fixedly connected to the placement platform, and the rotating shaft is rotatably connected to an end of the main rod away from the support. The sound level meter is fixedly placed on the placement platform. An expansion rod is telescopically arranged in the support rod. A bolt for fixing the expansion rod is arranged on the support rod. One end of the expansion rod is fixedly connected to an abutting plate, and the abutting plate abuts against the ground surface. A drill bit is telescopically arranged in the expansion rod, and the drill bit passes through the abutting plate and inserts into the soft ground. A fixing component for fixing the drill bit is arranged in the abutting block.

[0007] By adopting the above technical solution, when a staff member measures noise, after determining the measurement position, the staff member places the bracket at that position and adjusts the length of the expansion rod according to the ground pitting to keep the support in a horizontal state. The abutting block abuts against the ground surface, which can increase the stability of the bracket. When the ground is soft muddy ground, the staff member extends the drill bit out of the abutting block and fixes it through the second fixing component. When placing the support rod, the staff member inserts the drill bit into the muddy ground, so as to deal with ground conditions of different flatness and softness / hardness, improve the stability of the bracket, and further reduce the possibility of the bracket tipping over.

[0008] Preferably, a first storage slot is provided in the telescopic rod, the drill bit slides in the first storage slot, a limit block is fixedly connected to the drill bit, and the limit block abuts against the inner wall of the first storage slot; a through slot is provided in the abutment block, the drill bit is inserted into the through slot, and a slot is provided in the side wall of the drill bit;

[0009] The fixing assembly includes a fixing block, a first rack, a first gear and a rotating rod. The side wall of the through groove is provided with a first placement groove, the fixing block slides in the first placement groove, the fixing block is inserted in the slot, the first rack is fixedly connected to the side wall of the fixing block, one end of the rotating rod rotates on the inner wall of the first placement groove, the other end of the rotating rod is penetrated through the inner wall of the first placement groove and rotates on the abutment block, the first gear is fixedly sleeved on the rotating rod, and the first gear is meshed with the first rack; a limiting assembly for limiting the rotation of the rotating rod is provided on the abutment block.

[0010] By adopting the above technical solution, for hard ground such as horizontal ground, the staff does not need to use the drill bit, the drill bit slides freely in the first storage slot, and under the action of the limit block, the drill bit cannot be separated from the telescopic rod, and when the staff places the abutment block, the drill bit abuts against the ground and is pushed into the first storage slot; when the bracket is placed on the ground such as soft ground, the staff first extends the drill bit out of the first storage slot to the maximum extent under the action of gravity, and then the staff rotates the rotating rod, the rotating rod rotates to drive the first gear to rotate, the first gear rotates to drive the first rack to rotate, and the first rack rotates to drive the fixed block to insert into the slot, thereby fixing the position of the drill bit, and then the staff limits the rotating rod through the limiting component to reduce the possibility of rotation of the rotating rod, thereby reducing the possibility of movement of the drill bit, and then the staff can insert the drill bit into the ground to increase the stability of the bracket.

[0011] Preferably, the limiting assembly includes a second gear, a limiting block and a first spring; a second placement groove is opened on the side wall of the abutment block, the rotating rod rotates on the inner wall of the second placement groove, the second gear is fixedly sleeved on the rotating rod, the limiting block is slidably connected to the inner wall of the second placement groove and inserted into the tooth groove of the second gear, and the two ends of the first spring are respectively fixedly connected to the limiting block and the inner wall of the second placement groove.

[0012] By adopting the above technical solution, when the staff needs to rotate the rotating rod to fix the drill bit, the staff first pulls the limiting block to compress the first spring away from the rotating rod. Then, the staff rotates the rotating rod. When the rotating rod is rotated to the minimum, the staff releases the limiting block. The limiting block is inserted into the tooth groove of the second tooth block under the push of the elastic force of the first spring, thereby reducing the rotation of the rotating rod and further reducing the movement of the drill bit.

[0013] Preferably, a sliding groove is formed in the placement table, and clamping plates slide towards or away from each other in the sliding groove. The clamping plates abut against the sound level meter, and a driving assembly for driving the clamping plates to move is arranged on the placement table.

[0014] By adopting the above technical solution, after the staff places the bracket stably, the staff places the sound level meter on the placement table. Subsequently, the staff starts the driving assembly, and the driving assembly drives the two clamping plates to move towards each other to clamp and fix the sound level meter. At this time, the sound level meter is fixed, reducing the possibility of the sound level meter falling.

[0015] Preferably, the driving assembly includes a first motor and a first lead screw. The first motor is installed on the inner wall of the sliding groove, the first lead screw rotates in the sliding groove, one end of the first lead screw is fixedly connected to the rotating shaft of the first motor, and the two clamping plates are threadedly connected to the first lead screw. A control panel for controlling the first motor is arranged on the placement table.

[0016] By adopting the above technical solution, after the sound level meter is placed, the staff starts the first motor through the control panel. The first motor rotates to drive the first lead screw to rotate, and the first lead screw rotates to drive the clamping plate to move.

[0017] Preferably, a rubber pad is fixedly connected to the clamping plate, and the rubber pad abuts against the sound level meter.

[0018] By adopting the above technical solution, the rubber pad abuts against the sound level meter device, which can reduce the rigid contact between the clamping plate and the sound level meter device, thereby reducing damage such as scratches on the surface of the sound level meter device.

[0019] Preferably, the main rod includes an outer rod and an inner rod. A second telescopic groove is formed in the outer rod, the inner rod slides in the second telescopic groove, the placement table is connected to the inner rod, and an adjusting assembly for adjusting the height of the main rod is arranged on the main rod.

[0020] By adopting the above technical solution, the staff adjusts the height of the main rod through the adjusting assembly to adapt to measurements at different height positions.

[0021] Preferably, the adjusting assembly includes a second motor, a second lead screw, and a guide block. The second motor is installed on the inner wall of the second telescopic groove, one end of the second lead screw is fixedly connected to the rotating shaft of the second motor, the inner rod is threadedly connected to the second lead screw, the guide block is fixedly connected to the side wall of the inner rod, a guide groove for the guide block to slide is formed on the inner wall of the second telescopic groove, and the control panel controls the state of the second motor.

[0022] By adopting the above technical solution, when the staff needs to adjust the height of the main rod, the staff starts the second motor through the control panel, the rotation of the second motor drives the second screw rod to rotate, and under the guidance of the guide block, the second screw rod rotates to drive the inner rod to move, thereby adjusting the height of the main rod.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When measuring noise, after determining the measuring position, the staff will place the bracket at the position and adjust the length of the telescopic rod according to the potholes on the ground to keep the bracket horizontal. The abutment block abuts against the ground surface, which can increase the stability of the bracket. When the ground is soft mud, the staff will extend the drill bit out of the abutment block and fix it through the second fixing component. When placing the support rod, the staff will insert the drill bit into the mud, so that it can be used to cope with ground conditions of different flatness and hardness, improve the stability of the bracket, and reduce the possibility of the bracket tipping over.

[0025] 2. For hard ground such as horizontal ground, the staff does not need to use the drill bit. The drill bit slides freely in the first storage slot, and under the action of the limit block, the drill bit cannot be separated from the telescopic rod. When the staff places the abutment block, the drill bit abuts against the ground and is pushed into the first storage slot; when the bracket is placed on the ground such as soft ground, the staff first extends the drill bit out of the first storage slot to the maximum extent under the action of gravity, and then the staff rotates the rotating rod, the rotating rod rotates to drive the first gear to rotate, the first gear rotates to drive the first rack to rotate, and the first rack rotates to drive the fixed block to insert into the slot, thereby fixing the position of the drill bit, and then the staff limits the rotating rod through the limiting component to reduce the possibility of the rotating rod rotating, thereby reducing the possibility of the drill bit moving, and then the staff can insert the drill bit into the ground to increase the stability of the bracket;

[0026] 3. The staff adjusts the height of the main pole through the adjustment component to adapt to the measurement at different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the sound level meter bracket.

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the sound level meter bracket.

[0029] Figure 3 It is a top view structural diagram of the sound level meter bracket.

[0030] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0031] Description of reference numerals:

[0032] 1. Support; 2. Support rod; 21. Telescopic rod; 211. First storage groove; 22. Bolt; 23. Drill bit; 231. Limit block; 3. Main rod; 31. Outer rod; 32. Inner rod; 33. Adjusting assembly; 331. Second motor; 332. Second lead screw; 333. Guide block; 334. Second telescopic groove; 335. Guide groove; 4. Placing table; 41. Sliding groove; 42. Clamping plate; 5. Rotating shaft; 6. Abutting plate; 61. Through groove; 7. Fixing assembly; 71. Slot; 72. Fixed block; 73. First rack; 74. First gear; 75. Rotating rod; 76. First placing groove; 8. Limiting assembly; 81. Second gear; 82. Limiting block; 83. First spring; 84. Second placing groove; 9. Driving assembly; 91. First motor; 92. First lead screw; 93. Rubber pad; 94. Control panel. Detailed implementation mode

[0033] The following is a further detailed description of this application in conjunction with the attached Figures 1-4 drawings.

[0034] As Figure 1 shown, the embodiment of this application discloses a sound level meter bracket, which sequentially includes a placing table 4, a main rod 3, a support 1 and a plurality of support rods 2 from top to bottom. In this embodiment, the number of support rods 2 is selected as three, and the three support rods 2 form a triangle with a stable structure. The placing table 4 is cylindrical, and its axis is arranged in the vertical direction. The lower end surface of the placing table 4 is fixedly welded with a rotating shaft 5, and the bottom of the rotating shaft 5 rotates on the top of the main rod 3. The sound level meter is fixedly placed on the placing table 4. When the sound level meter is measuring, the staff can rotate the placing table 4, so as to adjust the direction of the sound level meter thereon, and then different azimuth data can be measured at the same position, reducing errors and accurate data.

[0035] As Figure 2 and Figure 3As shown in the figure, a sliding groove 41 is formed along the upper end surface of the placing table 4. Two clamping plates 42 slide towards or away from each other within the sliding groove 41. A driving assembly 9 for driving the movement of the clamping plates 42 is provided on the placing table 4. Rubber pads 93 are fixedly adhered to the opposite side walls of the two clamping plates 42. The rubber pads 93 abut against the sound level meter. The rubber pads 93 reduce the rigid contact between the clamping plates 42 and the sound level meter device, thereby reducing damage such as scratches on the surface of the sound level meter device. The driving assembly 9 includes a first motor 91 and a first lead screw 92. The first motor 91 is a double-shaft motor, and the number of the first lead screws 92 is two, which are respectively fixedly welded to the rotating shafts at both ends of the first motor 91. The first motor 91 is fixedly installed on the bottom inner wall in the middle of the sliding groove 41. The end of the first lead screw 92 away from the first motor 91 rotates on the side inner wall of the sliding groove 41. The two clamping plates 42 are respectively threadedly connected to the two first lead screws 92. A control panel 94 for controlling the first motor 91 is provided on the placing table 4. When the staff installs the sound level meter, the staff places the sound level meter on the placing table 4. Subsequently, with one hand supporting the sound level meter device and the other hand operating the control panel 94 to start the first motor 91, the first motor 91 starts to drive the first lead screw 92 to rotate. The first lead screw 92 rotates to drive the clamping plates 42 to move, so as to clamp and fix the sound level meter device with the two clamping plates 42. The staff can respectively adjust the states of the rotating shafts at both ends of the first motor 91 through the control panel 94. Therefore, the sound level meter is not necessarily fixed in the middle of the placing table 4, but can also be at the end of the placing table 4.

[0036] As Figure 2 As shown in the figure, the main rod 3 includes an outer rod 31 and an inner rod 32. Both the inner rod 32 and the outer rod 31 are cylindrical, and their axis lines are on the same straight line in the vertical direction. The outer rod 31 is provided with a second telescopic groove 334 along the vertical direction. The inner rod 32 slides vertically within the second telescopic groove 334. The bottom of the rotating shaft 5 rotates on the top of the inner rod 32. An adjusting assembly 33 for adjusting the height of the main rod 3 is provided on the main rod 3. The adjusting assembly 33 includes a second motor 331, a second lead screw 332, and a guide block 333. The second motor 331 is fixedly installed on the bottom inner wall of the second telescopic groove 334. The second lead screw 332 is a bidirectional lead screw. The second lead screw 332 rotates vertically within the second telescopic groove 334, and the bottom end of the second lead screw 332 is fixedly connected to the rotating shaft of the second motor 331. The inner rod 32 is threadedly connected to the second lead screw 332. The guide block 333 is fixedly welded to the side wall of the inner rod 32. A guide groove 335 for the guide block 333 to slide is formed along the vertical direction on the inner wall of the second telescopic groove 334. The control panel 94 controls the state of the second motor 331.

[0037] As Figure 2As shown, when the staff detects that the height of the sound level meter needs to be adjusted, the staff controls the second motor 331 to start through the control panel 94. The rotation of the second motor 331 drives the rotation of the second lead screw 332. Under the guidance of the guide block 333, the rotation of the second lead screw 332 drives the inner rod 32 to move vertically, thereby adjusting the height of the main rod 3 to adapt to measurements at different height positions.

[0038] As Figure 2 and Figure 4 shown, the tops of the three support rods 2 are hinged to the lower end surface of the support 1, the main rod 3 is fixedly connected to a side wall of the support 1 away from the support rod 2, a telescopic rod 21 is telescopically arranged in the support rod 2, and a bolt 22 for fixing the telescopic rod 21 is arranged on the support rod 2. The staff can tighten the bolt 22 to tightly fix the telescopic rod 21, so that the length of the support rod 2 can be adjusted according to the depth of the ground pothole. A contact plate 6 is fixedly welded to the bottom end of the telescopic rod 21. The contact block is cylindrical, and the lower end surface of the contact plate 6 abuts against the ground surface, thereby increasing the contact area with the ground, and further improving the support and enhancing the stability of the bracket. A drill bit 23 is telescopically arranged in the telescopic rod 21. The drill bit 23 passes through the contact plate 6 and inserts into the soft ground. A fixing component 7 for fixing the drill bit 23 is arranged in the contact block.

[0039] As Figure 2 and Figure 4 shown, a first storage groove 211 is opened in the telescopic rod 21. The drill bit 23 slides in the first storage groove 211. A limit block 231 is fixedly welded to the top of the drill bit 23. The limit block 231 abuts against the bottom inner wall of the first storage groove 211, reducing the possibility of the drill bit 23 detaching from the first storage groove 211. The bottom end of the drill bit 23 is pointed, which is convenient for inserting into the ground. A through groove 61 is opened in the contact block. The drill bit 23 passes through the through groove 61, and a slot 71 is opened on the side wall of the drill bit 23. The fixing component 7 includes a fixing block 72, a first rack 73, a first gear 74 and a rotating rod 75. A first placement groove 76 is opened in the side wall of the through groove 61 along the horizontal direction. The fixing block 72 is rectangular. The fixing block 72 slides horizontally in the first placement groove 76 and is inserted into the slot 71. The first rack 73 is fixedly welded to the side wall of the fixing block 72. The bottom end of the rotating rod 75 rotates on the bottom inner wall of the first placement groove 76. The first gear 74 is fixedly sleeved on the bottom side wall of the rotating rod 75. The first gear 74 meshes with the first rack 73; a limiting component 8 for limiting the rotation of the rotating rod 75 is arranged on the contact block.

[0040] As Figure 2 and Figure 4As shown, the limiting component 8 includes a second gear 81, a limiting block 82, and a first spring 83; a second placement groove 84 is formed on the upper end surface of the abutting block, the top side wall of the rotating rod 75 rotates on the inner wall of the second placement groove 84, the second gear 81 is fixedly sleeved on the top side wall of the rotating rod 75 and rotates in the second placement groove 84, the limiting block 82 is in an inverted T shape, the limiting block 82 is slidably connected to the inner wall of the second placement groove 84 in the horizontal direction and is embedded in the tooth groove of the second gear 81, and both ends of the first spring 83 are fixedly welded to the limiting block 82 and the inner wall of the second placement groove 84 respectively.

[0041] As Figure 2 and Figure 4 shown, when the staff is measuring, after determining the measurement position, the staff places the bracket at this position and adjusts the support rod 2 according to different ground conditions. If the ground is a concrete ground, the staff does not fix the drill bit 23. The staff adjusts the length of the telescopic rod 21 according to the ground pothole degree and fixes it with the bolt 22, so that the support 1 maintains a horizontal state. At the same time, the abutting block abuts against the ground surface, which can increase the stability of the bracket. At this time, the drill bit 23 in the telescopic rod 21 is pushed into the first storage groove 211 when it contacts the ground. If the ground is a soft muddy ground, the staff moves the abutting block away from the ground. The drill bit 23 extends and contracts in the first storage groove 211 under the action of gravity and is at the maximum position. At this time, the staff first pulls and limits the compression of the first spring 83 away from the rotating rod 75, and then the staff rotates the rotating rod 75. The rotation of the rotating rod 75 drives the first gear 74 to rotate, the rotation of the first gear 74 drives the first rack 73 to rotate, and the rotation of the first rack 73 drives the fixing block 72 to insert into the slot 71, so as to fix the position of the drill bit 23. After that, the staff inserts the drill bit 23 into the muddy ground to improve the stability of the bracket, and further reduce the possibility of the bracket tipping over. Furthermore, it can be used to cope with ground conditions with different flatness and softness. After the drill bit 23 is fixed, the staff releases the limiting block 82. The limiting block 82 is inserted into the tooth groove of the second tooth block under the elastic force of the first spring 83, so as to reduce the rotation of the rotating rod 75 and further reduce the movement of the drill bit 23.

[0042] The implementation principle of the embodiment of this application is: when the staff is measuring noise, after determining the measurement position, the staff places the bracket at this position and adjusts the length of the telescopic rod 21 according to the ground potholes so that the support 1 maintains a horizontal state. The abutting block abuts against the ground surface, which can increase the stability of the bracket; when the ground is a soft muddy ground, the staff makes the drill bit 23 extend out of the abutting block and fix it through the second fixing component 7. When the staff places the support rod 2, the drill bit 23 is inserted into the muddy ground, so as to be used to cope with ground conditions with different flatness and softness, improve the stability of the bracket, and further reduce the possibility of the bracket tipping over.

[0043] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. Sound level meter bracket, characterized by: The invention comprises a support (1), a plurality of support rods (2), a main rod (3) and a placement platform (4), wherein the plurality of support rods (2) are hinged on the support (1), the main rod (3) is fixedly connected to a side wall of the support (1) away from the support rods (2), the placement platform (4) is fixedly connected to a rotating shaft (5), the rotating shaft (5) is rotatably connected to one end of the main rod (3) away from the support (1), and the sound level meter is fixedly placed on the placement platform (4); the support rods ( 2) is telescopically provided with a telescopic rod (21), a bolt (22) for fixing the telescopic rod (21) is provided on the support rod (2), one end of the telescopic rod (21) is fixedly connected with an abutment plate (6), the abutment plate (6) abuts against the ground surface, a drill bit (23) is telescopically provided with a drill bit (23) in the telescopic rod (21), the drill bit (23) is inserted into the soft ground through the abutment plate (6), and a fixing component (7) for fixing the drill bit (23) is provided in the abutment plate.

2. The sound level meter bracket according to claim 1, characterized in that: A first storage groove (211) is provided in the telescopic rod (21), the drill bit (23) slides in the first storage groove (211), a limit block (231) is fixedly connected to the drill bit (23), and the limit block (231) abuts against the inner wall of the first storage groove (211); a through groove (61) is provided in the abutment plate, the drill bit (23) passes through the through groove (61), and a slot (71) is provided on the side wall of the drill bit (23); The fixing assembly (7) comprises a fixing block (72), a first rack (73), a first gear (74) and a rotating rod (75); a first placement groove (76) is provided on the side wall of the through groove (61); the fixing block (72) slides in the first placement groove (76); the fixing block (72) is inserted into the slot (71); the first rack (73) is fixedly connected to the side wall of the fixing block (72); one end of the rotating rod (75) rotates on the inner wall of the first placement groove (76); the other end of the rotating rod (75) is inserted into the inner wall of the first placement groove (76) and rotates on the abutment plate; the first gear (74) is fixedly sleeved on the rotating rod (75); the first gear (74) is meshed with the first rack (73); a limiting assembly (8) for limiting the rotation of the rotating rod (75) is provided on the abutment plate.

3. The sound level meter bracket according to claim 2, characterized in that: The limiting assembly (8) comprises a second gear (81), a limiting block (82) and a first spring (83); a second placement groove (84) is provided on the side wall of the abutment plate; the rotating rod (75) rotates on the inner wall of the second placement groove (84); the second gear (81) is fixedly sleeved on the rotating rod (75); the limiting block (82) is slidably connected to the inner wall of the second placement groove (84) and inserted into the tooth groove of the second gear (81); and the two ends of the first spring (83) are respectively fixedly connected to the limiting block (82) and the inner wall of the second placement groove (84).

4. The sound level meter bracket according to claim 1, characterized in that: The placement table (4) is provided with a sliding groove (41), and two clamping plates (42) are provided in the sliding groove (41) for sliding toward or away from each other. The two clamping plates (42) are in contact with the sound level meter equipment. The placement table (4) is provided with a driving component (9) for driving the clamping plates (42) to move.

5. The sound level meter bracket according to claim 4, characterized in that: The driving assembly (9) comprises a first motor (91) and a first screw rod (92); the first motor (91) is mounted on the inner wall of the sliding groove (41); the first screw rod (92) rotates in the sliding groove (41); one end of the first screw rod (92) is fixedly connected to the rotating shaft of the first motor (91); two clamping plates (42) are threadedly connected to the first screw rod (92); and a control panel (94) for controlling the first motor (91) is arranged on the placement table (4).

6. The sound level meter bracket according to claim 4, characterized in that: The two clamping plates (42) are fixedly connected to opposite side walls with rubber pads (93), and the rubber pads (93) abut against the sound level meter.

7. The sound level meter bracket according to claim 5, characterized in that: The main rod (3) comprises an outer rod (31) and an inner rod (32); a second telescopic slot (334) is provided in the outer rod (31); the inner rod (32) slides in the second telescopic slot (334); the placement platform (4) is connected to the inner rod (32); and an adjustment component (33) for adjusting the height of the main rod (3) is provided on the main rod (3).

8. The sound level meter bracket according to claim 7, characterized in that: The adjustment assembly (33) comprises a second motor (331), a second screw rod (332) and a guide block (333); the second motor (331) is mounted on the inner wall of the second telescopic slot (334); one end of the second screw rod (332) is fixedly connected to the rotating shaft of the second motor (331); the inner rod (32) is threadedly connected to the second screw rod (332); the guide block (333) is fixedly connected to the side wall of the inner rod (32); a guide groove (335) for the guide block (333) to slide is provided on the inner wall of the second telescopic slot (334); and the control panel (94) controls the state of the second motor (331).

Images