A portable decibel meter

Abstract

The present invention discloses a portable decibel meter, which includes a decibel meter housing. One side of the decibel meter housing is fixedly connected with an outer shell. A receiving cavity is formed between the decibel meter housing and the outer shell. One side of the inner cavity of the receiving cavity is fixedly connected with a wire. The end of the wire far away from the receiving cavity is fixedly connected with a monitoring rod. A guiding mechanism is arranged in the middle of the inner cavity of the outer shell. A plurality of adjusting mechanisms for adjusting the position of the wire are arranged in the receiving cavity. When the output end of the guiding mechanism moves horizontally away from the monitoring rod, the output ends of the plurality of adjusting mechanisms move downwards in sequence. When the output end of the guiding mechanism moves horizontally close to the monitoring rod, the output ends of the plurality of adjusting mechanisms move upwards in sequence. In the present invention, by pushing the slider to drive the guiding plate to move, the support block is sequentially driven to move towards the direction of the third groove, so that the driven rod moves into the third groove, and further the support block moves downwards under the action of the elastic rope to the lower part of the fixed ring.

Description

Technical Field

[0001] The present invention relates to the technical field of noise detection, and in particular to a portable decibel meter. Background Art

[0002] A decibel meter generally consists of a capacitive microphone, a preamplifier, an attenuator, an amplifier, a frequency weighting network, and an effective value display. The microphone converts sound into an electrical signal, and then the preamplifier changes the impedance to match the microphone with the attenuator. The amplifier adds the output signal to the weighting network to perform frequency weighting on the signal. Then, the signal is amplified to a certain amplitude through the attenuator and the amplifier, and sent to an effective value detector, and the specific decibel value is given on the display.

[0003] When the decibel meter is used to measure the noise in an area that is difficult for a human to directly reach, the detection probe is usually directly connected to the decibel meter housing through a wire, so that the probe can reach a position that is difficult for the meter body to reach. The wires are usually wound together. During the process of packing them into a container and carrying them, the wires are usually squeezed, and during the bumpy process, the bent parts of the wires are repeatedly squeezed many times, resulting in damage to the bent parts of the wires and affecting the detection results of the decibel meter. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable decibel meter to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A portable decibel meter includes a decibel meter housing. One side of the decibel meter housing is fixedly connected with an outer shell. A receiving cavity is formed between the decibel meter housing and the outer shell. One side of the inner cavity of the receiving cavity is fixedly connected with a wire. The end of the wire far away from the receiving cavity is fixedly connected with a monitoring rod. A guiding mechanism is arranged in the middle of the inner cavity of the outer shell. A plurality of adjusting mechanisms for adjusting the position of the wire are arranged in the receiving cavity. When the output end of the guiding mechanism horizontally moves away from the monitoring rod, the output ends of the plurality of adjusting mechanisms move downwards in sequence. When the output end of the guiding mechanism horizontally moves close to the monitoring rod, the output ends of the plurality of adjusting mechanisms move upwards in sequence.

[0007] As a further solution of the present invention: The adjusting mechanism includes a sliding plate. A plurality of vertical grooves are opened on one side of the side wall of the decibel meter housing close to the outer shell. The sliding plate is vertically slidably connected in the vertical grooves. The middle part of the lower end of the sliding plate is elastically connected to the bottom of the inner cavity of the vertical groove through an elastic rope. On one side of the sliding plate close to the outer shell, symmetric elastic telescopic rods are fixedly connected. The symmetric elastic telescopic rods are fixedly connected to a connecting plate at the ends far away from the sliding plate. The connecting plate is fixedly connected to a support block at the end far away from the elastic telescopic rod. The support block is fixedly connected to a guide post at the end far away from the connecting plate. The length of the support block is the same as the width of the accommodating cavity.

[0008] As a further solution of the present invention: The guide post is vertically slidably connected to the side wall of the outer shell. Fixed rings are arranged between the symmetric vertical grooves. The fixed rings are fixedly connected to the lower part of the side wall of the decibel meter housing. The plane of the bottom of the inner cavity of the vertical groove is lower than the plane of the lower end face of the fixed ring. First inclined surfaces are opened on both sides of the upper end of the support block and the upper end of the connecting plate. Symmetric first clamping blocks are arranged on one side of the upper part of the inner cavity of the vertical groove close to the connecting plate. A second inclined surface is opened at the lower end of the first clamping block. The first clamping block is elastically connected to the side wall of the inner cavity of the vertical groove. A support rod is arranged above the first clamping block. The support rod is fixedly connected to both sides of the vertical groove. The length of the support rod is less than the length of the support block.

[0009] As a further solution of the present invention: Symmetric driven rods are fixedly connected to one side of the connecting plate close to the sliding plate. A first groove and a third groove for cooperating with the driven rods are opened on both sides of the inner cavity of the vertical groove. Symmetric second grooves are opened on one side of both ends of the first groove close to the sliding plate.

[0010] As a further solution of the present invention: The driven rods are slidably connected to the first groove, the second groove and the third groove. A second clamping block is vertically slidably connected to the bottom of the inner cavity of the second groove above and close to the third groove. A third inclined surface is opened on one side of the second clamping block close to the first groove. The second clamping block is elastically connected to the bottom of the inner cavity of the second groove above.

[0011] As a further solution of the present invention: The guiding mechanism includes a guiding plate. The guiding plate is horizontally slidably connected to the middle part of the inner cavity of the outer shell. The middle part of one side of the guiding plate far away from the decibel meter housing is fixedly connected to a slider. A chute for cooperating with the slider is opened in the middle part of one side of the outer shell far away from the decibel meter housing. The slider is slidably connected in the chute. Guide blocks are fixedly connected to both ends of the guiding plate. A guiding groove is opened in the middle part of one side of the guiding plate close to the decibel meter housing.

[0012] As a further solution of the present invention: a first through groove is opened on one side of the guiding block located above and close to the decibel meter housing, and a fitting groove is opened on one side of the guiding block located above and close to the guiding plate. A baffle is rotatably connected at the connection between the upper end of the guiding groove and the first through groove.

[0013] As a further solution of the present invention: an arc groove is opened on one side of the inner cavity of the first through groove close to the baffle. An arc block is slidably connected in the arc groove. The side wall of the arc block is fixedly connected to the side wall of the baffle. The upper end of the arc block is elastically connected to the upper side wall of the inner cavity of the arc groove through an arc spring.

[0014] As a further solution of the present invention: a notch for cooperating with the baffle is opened at the top of the guiding block located above. An extension rod is fixedly connected to one side of the lower part of the first through groove away from the fitting groove. A guiding rod is vertically slidably connected to the middle of the upper end of the extension rod. The bottom of the guiding rod is elastically connected to the bottom of the inner cavity of the extension rod.

[0015] As a further solution of the present invention: an inclined groove is opened at the lower end of the support block. The inclined groove is inclined towards the direction where the guiding column is located. A horizontal groove is opened at one end of the inclined groove away from the guiding column. One end of the inclined groove and the horizontal groove close to the monitoring rod coincide. The horizontal plane where the top of the inner cavity of the inclined groove is located is lower than the plane where the top end of the inner cavity of the horizontal groove is located. One end of the inner cavity of the horizontal groove close to the monitoring rod is lower than the end away from the monitoring rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] By pushing the slider to drive the guiding plate to move, thereby sequentially driving the support block to move towards the direction of the third groove, so that the driven rod moves into the third groove, and then the support block moves downward under the action of the elastic cord to the lower part of the fixed ring. At this time, the wire will be supported by the elastic support rod. Then, the wire is driven to move by the monitoring rod. At this time, the wire separates from the support rod and moves downward. The position of the fixed ring will limit the lowest position of the wire. Therefore, during the reset process of the wire plate, it will drive the support block to move upward, thereby driving the wire to move upward again, and then completing the storage of the wire, so as to avoid the bending part of the wire after winding from being overly squeezed and damaged, thereby affecting the measurement result of the decibel meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure inside the accommodation cavity of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure in area A in the figure of the present invention.

[0021] Figure 4 This is a schematic structural diagram of the support block in the present invention.

[0022] Figure 5 This is a schematic structural diagram of the wire board in the present invention.

[0023] Figure 6 This is a schematic structural diagram of the interior of the wire board in the present invention.

[0024] Figure 7 For the present invention Figure 5 This is a schematic structural diagram of area B.

[0025] Figure 8 This is a schematic structural diagram of the guide rod in the present invention.

[0026] Figure 9 For the present invention Figure 6 This is a schematic structural diagram of area C.

[0027] Figure 10 This is a schematic structural diagram of the interior of the vertical groove in the present invention.

[0028] In the figure: 1, decibel meter housing; 2, monitoring rod; 3, wire; 4, slider; 5, chute; 6, outer shell; 7, accommodation cavity; 8, fixing ring; 9, vertical groove; 10, support rod; 11, first clamping block; 12, connecting plate; 13, sliding plate; 14, elastic telescopic rod; 15, driven rod; 16, support block; 17, inclined groove; 18, horizontal groove; 19, guide post; 20, guide plate; 21, guide block; 22, notch; 23, first through groove; 24, mating groove; 25, baffle; 26, arc block; 27, arc groove; 28, guide groove; 29, second through groove; 30, second clamping block; 31, first groove; 32, second groove; 33, third groove; 34, extension rod; 35, guide rod. Detailed implementation manners

[0029] Please refer to Figures 1-3 , in an embodiment of the present invention, a portable decibel meter includes a decibel meter housing 1. One side of the decibel meter housing 1 is fixedly connected to an outer shell 6. An accommodation cavity 7 is formed between the decibel meter housing 1 and the outer shell 6. One side of the inner cavity of the accommodation cavity 7 is fixedly connected to a wire 3. One end of the wire 3 far from the accommodation cavity 7 is fixedly connected to a monitoring rod 2. A guiding mechanism is arranged in the middle of the inner cavity of the outer shell 6. A plurality of adjusting mechanisms for adjusting the position of the wire 3 are arranged in the accommodation cavity 7. When the output end of the guiding mechanism horizontally moves away from the monitoring rod 2, the output ends of the plurality of adjusting mechanisms move downwards in sequence. When the output end of the guiding mechanism horizontally approaches the monitoring rod 2, the output ends of the plurality of adjusting mechanisms move upwards in sequence.

[0030] Please refer to Figure 4 and 10, the adjusting mechanism includes a sliding plate 13. A plurality of vertical grooves 9 are formed in the side wall of the decibel meter housing 1 close to the outer shell 6. The sliding plate 13 is vertically and slidably connected in the vertical grooves 9. The middle part of the lower end of the sliding plate 13 is elastically connected to the bottom of the inner cavity of the vertical groove 9 through an elastic rope. A pair of symmetric elastic telescopic rods 14 are fixedly connected to the side of the sliding plate 13 close to the outer shell 6. The ends of the pair of symmetric elastic telescopic rods 14 away from the sliding plate 13 are commonly fixedly connected to a connecting plate 12. That is, when the connecting plate 12 is subjected to a force towards the direction where the sliding plate 13 is located, at this time, the elastic telescopic rods 14 will contract, so that the connecting plate 12 approaches towards the direction where the sliding plate 13 is located. One end of the connecting plate 12 away from the elastic telescopic rods 14 is fixedly connected to a support block 16. One end of the support block 16 away from the connecting plate 12 is fixedly connected to a guide post 19. The length of the support block 16 is the same as the width of the accommodation cavity 7. That is, the interval between the side wall of the decibel meter housing 1 and the side wall of the outer shell 6 is the same as the length of the support block 16. The guide post 19 is vertically and slidably connected to the side wall of the outer shell 6. Fixed rings 8 are arranged between the symmetric vertical grooves 9. The fixed rings 8 are fixedly connected to the lower part of the side wall of the decibel meter housing 1. A rope hole is formed in the middle of the decibel meter housing 1. The wire 3 passes through a plurality of fixed rings 8 from the side of the decibel meter housing 1 away from the monitoring rod 2 and is fixedly connected to the monitoring rod 2. The plane of the bottom of the inner cavity of the vertical groove 9 is lower than the plane of the lower end face of the fixed ring 8. That is, when the support block 16 is located in the lower part of the inner cavity of the vertical groove 9, at this time, the upper end face of the support block 16 is lower than the lower end face of the wire 3. At this time, when the support block 16 moves upward along with the sliding plate 13, the support block 16 will contact the wire 3, so as to lift the wire 3 and then store the wire 3 into the accommodation cavity 7.

[0031] First inclined surfaces are formed on the upper ends of the support block 16 and both sides of the upper end of the connecting plate 12. A pair of symmetric first clamping blocks 11 are arranged on the side of the upper part of the inner cavity of the vertical groove 9 close to the connecting plate 12. A second inclined surface is formed at the lower end of the first clamping block 11. The first clamping block 11 is elastically connected to the side wall of the inner cavity of the vertical groove 9. During the upward movement of the connecting plate 12, the first inclined surface will approach and contact the second inclined surface, so as to squeeze the first clamping block 11 towards both sides. When the lower end face of the connecting plate 12 coincides with the upper end face of the first clamping block 11, at this time, the first clamping block 11 will reset due to the elastic force, so as to provide support for the bottom of the connecting plate 12, so as to prevent the connecting plate 12 and the sliding plate 13 from moving downward due to the elastic force, so that the support block 16 can stably support the wire 3. A support rod 10 is arranged above the first clamping block 11. The support rod 10 is fixedly connected to both sides of the vertical groove 9. The length of the support rod 10 is less than the length of the support block 16, and the support rod 10 is flexible. That is, when the connecting plate 12 drives the support block 16 to move downward, the pair of support rods 10 will still provide support for the wire 3. At this time, after pulling the wire 3 through the monitoring rod 2, the support rod 10 will bend, so that the wire 3 is separated from the support rod 10 and the wire 3 extends out of the accommodation cavity 7.

[0032] On one side of the connecting plate 12 close to the sliding plate 13, symmetric driven rods 15 are fixedly connected. On both sides of the inner cavity of the vertical groove 9, a first groove 31 and a third groove 33 for cooperating with the driven rod 15 are provided. On one side of both ends of the first groove 31 close to the sliding plate 13, symmetric second grooves 32 are provided. The second grooves 32 connect the first groove 31 and the third groove 33. The driven rod 15 is slidably connected to the first groove 31, the second groove 32 and the third groove 33. Vertically slidably connected to the bottom of the inner cavity of the second groove 32 close to the third groove 33 above is a second clamping block 30. On the side of the second clamping block 30 close to the first groove 31, a third inclined surface is provided. The second clamping block 30 is elastically connected to the bottom of the inner cavity of the second groove 32 above. When the connecting plate 12 drives the driven rod 15 to move towards the position of the sliding plate 13, the driven rod 15 will move from the junction of the first groove 31 and the second groove 32 above to the junction of the second groove 32 and the third groove 33 above. During this process, the driven rod 15 will contact the third inclined surface and thus squeeze the second clamping block 30 downward. After the driven rod 15 moves to the junction of the second groove 32 and the third groove 33 above, the second clamping block 30 rebounds upward due to the elastic force and resets, thereby limiting the driven rod 15, thus preventing the connecting plate 12 from moving away from the sliding plate 13 due to the elastic force of the elastic telescopic rod 14. Under the action of the elastic cord, the sliding plate 13 will drive the connecting plate 12 and the driven rod 15 to move downward along the third groove 33 to the junction of the second groove 32 and the third groove 33 below, and under the elastic force of the elastic telescopic rod 14, it will push the connecting plate 12 to drive the driven rod 15 to move to the junction of the second groove 32 and the first groove 31 below.

[0033] Please refer to Figures 5-9, the guiding mechanism includes a guiding plate 20 which is horizontally and slidably connected to the middle of the inner cavity of the housing 6. A slider 4 is fixedly connected to the middle of the side of the guiding plate 20 away from the decibel meter housing 1. A sliding groove 5 for cooperating with the slider 4 is provided in the middle of the side of the housing 6 away from the decibel meter housing 1. The slider 4 is slidably connected in the sliding groove 5. By pushing the slider 4 to move horizontally along the sliding groove 5, the guiding plate 20 can be driven to move horizontally. Guide blocks 21 are fixedly connected to both ends of the guiding plate 20. A guiding groove 28 is provided in the middle of the side of the guiding plate 20 close to the decibel meter housing 1. A first through groove 23 is provided on the side of the upper guide block 21 close to the decibel meter housing 1. An adaptation groove 24 is provided on the side of the upper guide block 21 close to the guiding plate 20. A baffle 25 is rotatably connected to the connection between the upper end of the guiding groove 28 and the first through groove 23. An arc groove 27 is provided on the side of the inner cavity of the first through groove 23 close to the baffle 25. An arc block 26 is slidably connected in the inner cavity of the arc groove 27. The side wall of the arc block 26 is fixedly connected to the side wall of the baffle 25. The upper end of the arc block 26 is elastically connected to the upper side wall of the inner cavity of the arc groove 27 through an arc spring. A notch 22 for cooperating with the baffle 25 is provided at the top of the upper guide block 21. That is, during the rotation of the baffle 25, the notch 22 will provide space for the rotation of the baffle 25 to avoid the upper guide block 21 from hindering the rotation of the baffle 25. The guide post 19 is slidably fitted in the first through groove 23. When the slider 4 is on the side of the sliding groove 5 close to the monitoring rod 2, at this time, the central position of the guide post 19 is on the same horizontal plane as the middle of the inner cavity of the first through groove 23. During the process of the guiding plate 20 moving horizontally away from the position where the monitoring rod 2 is located, the guide post 19 will relatively move into the inner cavity of the first through groove 23, and the bottom of the guide post 19 will be in contact with the bottom of the inner cavity of the first through groove 23. When the guide post 19 relatively moves to the connection between the first through groove 23 and the guiding groove 28, at this time, under the blocking action of the baffle 25, the guide post 19 will not enter the guiding groove 28, but will directly pass through the first through groove 23 inner cavity from the adaptation groove 24. A extension rod 34 is fixedly connected to the side of the lower part of the first through groove 23 away from the adaptation groove 24.

[0034] A guide rod 35 is vertically and slidably connected to the middle of the upper end of the extension rod 34. There is an elastic connection between the bottom of the guide rod 35 and the bottom of the inner cavity of the extension rod 34. An inclined groove 17 is formed at the lower end of the support block 16. The inclined groove 17 is inclined towards the direction where the guide post 19 is located. A horizontal groove 18 is formed at one end of the inclined groove 17 away from the guide post 19. One end of the inclined groove 17 and the horizontal groove 18 close to the monitoring rod 2 coincide. The horizontal plane where the top of the inner cavity of the inclined groove 17 is located is lower than the plane where the top end of the inner cavity of the horizontal groove 18 is located. One end of the inner cavity of the horizontal groove 18 close to the monitoring rod 2 is lower than the end away from the monitoring rod 2. During the process of the first through groove 23 moving along with the guide plate 20, the guide rod 35 will enter the inner cavity of the inclined groove 17 and will not enter the horizontal groove 18. Under the cooperation of the guide rod 35 and the inclined groove 17, the support block 16 will be pushed to move in the direction along with the sliding plate 13, so that the driven rod 15 moves into the third groove 33 and the support block 16 moves downward away from the wire 3. That is, during the horizontal movement of the guide plate 20, it will drive a plurality of support blocks 16 to sequentially descend from near to far relative to the position of the monitoring rod 2, so as to move downward away from the position of the support rod 10 one by one. After the plurality of support blocks 16 descend, the support rod 10 will support the wire 3. At this time, the monitoring rod 2 is moved so that the wire 3 can be withdrawn from the accommodation cavity 7. A second through groove 29 is formed in the middle of one side of the lower guide block 21 close to the decibel meter housing 1. The guide plate 20 and the guide groove 28 are both inclined towards the direction away from the monitoring rod 2. When the slider 4 is pushed to drive the guide plate 20 to move towards the direction where the monitoring rod 2 is located, the lower guide post 19 will relatively move into the second through groove 29 and relatively enter the inner cavity of the guide groove 28 through the second through groove 29. Thus, under the cooperation of the guide groove 28 and the guide post 19, the support block 16 is driven to move upward, and the driven rod 15 will also move upward along the first groove 31. When the guide post 19 relatively moves from below to the connection position of the guide groove 28 and the first through groove 23, at this time, the guide post 19 will push up the baffle 25 and make the baffle 25 rotate upward along the arc-shaped groove 27, so that the guide post 19 relatively moves into the inner cavity of the first through groove 23. During this process, the first inclined surface will contact the first clamping block 11 and squeeze the first clamping block 11 to both sides. After the guide post 19 moves into the inner cavity of the first through groove 23, the first clamping block 11 will be reset by elastic force and fit with the lower end of the connecting plate 12 to support and limit the connecting plate 12. Since the support block 16 is located below the fixed ring 8 after moving downward, during the upward movement of the support block 16, it will move upward from far to near relative to the position of the monitoring rod 2 and lift the wire 3, so that the wire 3 extending out of the accommodation cavity 7 is retracted back into the accommodation cavity 7 again, thus avoiding that during the process of carrying the decibel meter, since the decibel meter may be placed together with other items in a container. If the wire 3 is located on the outer wall of the decibel meter housing, after the wire 3 is bundled, the wire 3 will be wound and fixed through items such as a strapping tape. However, when there are many items carried, due to the limited space of the container, the bundled wire 3 may be squeezed by other items.And during the movement, it may cause the items in the container to shake, resulting in the bent part of the wire 3 being repeatedly squeezed for a long time, which may damage the wire 3 and then affect the measurement result of the decibel meter. And when bundling the wire 3 from far to near relative to the position of the monitoring rod 2, it can prevent the multiple support blocks 16 from moving up synchronously and being involved with each other, that is, it can avoid the situation where the bundling of the wire 3 is affected and the cable is damaged at the same time. After the guiding column 19 moves relatively into the inner cavity of the first through groove 23, at this time, the guiding rod 35 will also approach and enter the horizontal groove 18. And since the horizontal groove 18 is parallel to the side wall of the support block 16, the guiding rod 35 will not affect the position of the support block 16 after entering the inner cavity of the horizontal groove 18. And during the movement of the guiding rod 35 in the inner cavity of the horizontal groove 18, the guiding rod 35 will be gradually compressed, and after the guiding rod 35 is separated from the horizontal groove 18, it will reset due to the elastic force.,

Claims

1. A portable decibel meter, comprising a decibel meter housing, characterized in that: One side of the decibel meter shell is fixedly connected to the shell, a accommodating cavity is opened between the decibel meter shell and the shell, one side of the inner cavity of the accommodating cavity is fixedly connected to a wire, and the end of the wire away from the accommodating cavity is fixedly connected to a monitoring rod, a guide mechanism is arranged in the middle of the inner cavity of the shell, and a plurality of adjustment mechanisms for adjusting the position of the wire are arranged in the accommodating cavity, when the output end of the guide mechanism is horizontally away from the position of the monitoring rod, the output ends of the plurality of adjustment mechanisms move downward in sequence, and when the output end of the guide mechanism is horizontally close to the position of the monitoring rod, the output ends of the plurality of adjustment mechanisms move upward in sequence, and the adjustment mechanism includes A slide plate, a side wall of the decibel meter housing is provided with a plurality of vertical grooves on one side close to the outer shell, the slide plate is vertically slidably connected in the vertical groove, the middle part of the lower end of the slide plate is elastically connected to the bottom of the inner cavity of the vertical groove through an elastic rope, a side of the slide plate close to the outer shell is fixedly connected with symmetrical elastic telescopic rods, and the ends of the symmetrical elastic telescopic rods away from the slide plate are jointly fixedly connected with a connecting plate, the end of the connecting plate away from the elastic telescopic rods is fixedly connected with a support block, the end of the support block away from the connecting plate is fixedly connected with a guide column, the length of the support block is the same as the width of the accommodating cavity, and the guide column is connected to the outer shell. The side walls are vertically slidably connected, and fixing rings are arranged between the symmetrical vertical grooves, and the fixing rings are fixedly connected to the lower part of the side wall of the decibel meter shell, and the plane where the bottom of the inner cavity of the vertical groove is located is lower than the plane where the lower end surface of the fixing ring is located, and the upper end of the support block and the upper end of the connecting plate are provided with a first inclined surface, and a symmetrical first clamping block is arranged on one side of the upper part of the inner cavity of the vertical groove close to the connecting plate, and a second inclined surface is arranged at the lower end of the first clamping block, and the first clamping block is elastically connected to the inner cavity side wall of the vertical groove, and a support rod is arranged above the first clamping block, and the support rod is fixedly connected to the two sides of the vertical groove. The length of the support rod is smaller than that of the support block, and a symmetrical follower rod is fixedly connected to a side of the connecting plate close to the slide board, and grooves No. 1 and No. 3 are provided on both sides of the inner cavity of the vertical groove for cooperating with the follower rod, and symmetrical grooves No. 2 are provided at both ends of the groove No. 1 close to the side of the slide board, and the follower rod is slidably connected to the grooves No. 1, No. 2 and No. 3, and a second clamping block is vertically slidably connected to the bottom of the inner cavity of the upper groove No. 2 close to the groove No. 3, and a third inclined surface is provided on the side of the second clamping block close to the groove No. 1, and the second clamping block is elastically connected to the bottom of the inner cavity of the upper groove No.

2.

2. A portable decibel meter according to claim 1, characterized in that: The guide mechanism includes a guide plate, which is horizontally slidably connected to the middle of the inner cavity of the shell, a slider is fixedly connected to the middle of the side of the guide plate away from the decibel meter shell, a slide groove for cooperating with the slider is provided in the middle of the side of the shell away from the decibel meter shell, the slider is slidably connected in the slide groove, guide blocks are fixedly connected at both ends of the guide plate, and a guide groove is provided in the middle of the side of the guide plate close to the decibel meter shell.

3. A portable decibel meter according to claim 2, characterized in that: A first through slot is provided on the side of the upper guide block close to the decibel meter housing, an adapting slot is provided on the side of the upper guide block close to the guide plate, and a baffle is rotatably connected to the connection between the upper end of the guide slot and the first through slot.

4. A portable decibel meter according to claim 3, characterized in that: An arc groove is provided on one side of the first through groove inner cavity close to the baffle plate, and an arc block is slidably connected to the inner cavity of the arc groove. The side wall of the arc block is fixedly connected to the side wall of the baffle plate, and the upper end of the arc block is elastically connected to the upper side wall of the inner cavity of the arc groove through an arc spring.

5. A portable decibel meter according to claim 4, characterized in that: A notch is provided at the top of the guide block located above for use with the baffle, an extension rod is fixedly connected to the side of the lower part of the first through slot away from the adapter slot, a guide rod is vertically slidably connected to the middle part of the upper end of the extension rod, and the bottom of the guide rod is elastically connected to the bottom of the inner cavity of the extension rod.

6. A portable decibel meter according to claim 1, characterized in that: An inclined groove is provided at the lower end of the support block, and the inclined groove is inclined toward the direction where the guide column is located. A horizontal groove is provided at the end of the inclined groove away from the guide column. The inclined groove and the end of the horizontal groove close to the monitoring rod coincide with each other. The horizontal plane where the top of the inner cavity of the inclined groove is located is lower than the plane where the top of the inner cavity of the horizontal groove is located. The end of the inner cavity of the horizontal groove close to the monitoring rod is lower than the end away from the monitoring rod.

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