Combined hearing protection noise reduction device

Abstract

The invention discloses a combined hearing protection noise reduction device, and belongs to the technical field of hearing protection, the combined hearing protection noise reduction device comprises a noise reduction earmuff main body and a noise reduction earplug main body matched with the noise reduction earmuff main body, the noise reduction earplug main body comprises matched covers arranged in pairs, and multiple noise reduction earplug bodies are arranged on the matched covers. According to the noise reduction earplug, the noise reduction earplug main body and the noise reduction earmuff main body are arranged, the noise reduction earplug independent use mode and the earplug and earmuff combined use mode can be selected to be switched according to the decibel of noise, and therefore the hearing protection requirement under the noise states of different degrees is met; according to the multi-noise-reduction earplug, the magnetic ring in the heat dissipation guide pipe is driven to move, pushing force is continuously generated on liquid in the heat dissipation guide pipe, heat at the multi-noise-reduction earplug body can be brought out in the liquid flowing process, effective heat dissipation of the multi-noise-reduction earplug body is achieved, and the noise reduction effect is improved. And the heat dissipation effect under the combined use mode of the earplugs and the earmuffs is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of hearing protection, and in particular to a combined hearing protection noise reduction device. Background Art

[0002] Hearing protection comes in a variety of shapes, sizes and models with different attenuation characteristics and uses. There are two main types of hearing protection: earplugs and earmuffs. Earplugs are a closed-cell foam, custom silicone or thermoplastic elastomer material of appropriate size. Closed-cell foam earplugs are rolled into a ball and inserted into the ear canal and fixed in place. After insertion, they expand and can achieve different degrees of attenuation depending on the depth of the earplug in the ear canal. Earmuff-type hearing protection is ring-shaped and connected to an elastic headband or safety helmet. The noise reduction effect is often not as good as that of earplugs.

[0003] In some noisy working environments, earplugs and earmuffs are often needed to be used together. Currently, earplugs and earmuffs are just a simple combination without a reliable connection between them. When the earplugs are inserted deep into the ear canal, they are in a sealed environment of the earmuffs, and the ventilation effect is poor, which will cause a large amount of sweat to be produced in the ear canal, affecting the wearing experience. At the same time, the sweat will also affect the sound insulation effect of the earplugs. Based on this, a combined hearing protection noise reduction device is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing earplugs and earmuffs are simply combined without reliable connection with each other, and the earplugs that penetrate deep into the ear canal are in a sealed environment of the earmuffs during use, and the ventilation effect is poor, which will cause a large amount of sweat to be generated in the ear canal, affecting the wearing experience. At the same time, the sweat will also affect the sound insulation effect of the earplugs. A combined hearing protection noise reduction device is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A combined hearing protection noise reduction device comprises a noise reduction earmuff body and a noise reduction earplug body used in conjunction therewith, wherein the noise reduction earplug body comprises a pair of matching covers, the two matching covers are connected through a main frame, and multiple noise reduction earplug bodies are arranged on the matching covers;

[0007] The noise reduction earmuff body comprises an earmuff frame and shielding earmuffs arranged at both ends of the earmuff frame, the earmuff frame is connected to the main frame through a snap-on assembly, an assembly docking piece connected to a multiple noise reduction earplug body is arranged inside the shielding earmuff, a soundproof cover body is arranged on the shielding earmuff, a metal heat conductive sheet is arranged at the center of the earmuff frame, the metal heat conductive sheet is connected to the card assembly docking piece through a conveying pipeline, and magnetic driving components for pushing the heat dissipation liquid in the conveying pipeline to flow are arranged on both sides of the earmuff frame;

[0008] The multiple noise reduction earplug body is composed of a silicone bonding layer at the rear end, a sound insulation cotton pressure-resistant layer in the middle and a memory foam reset layer at the front end. The sound insulation cotton pressure-resistant layer is provided with a layer of corresponding grooves matched with the memory foam reset layer, and the silicone bonding layer is provided with two layers of corresponding grooves matched with the sound insulation cotton pressure-resistant layer.

[0009] Preferably, the sound insulation cotton pressure-resistant layer is fixedly connected to a terminal column, the memory cotton reset layer is connected to the terminal column through a telescopic column, the silicone bonding layer is pasted on the matching cover, the terminal column extends outward through the silicone bonding layer, and is connected to a terminal combination plate.

[0010] Preferably, the main frame body comprises a bracket and a bracket seat connected to the matching cover, the bracket seat is provided with a connecting groove, the end of the bracket is located in the connecting groove, and is rotatably connected to the inner wall of the connecting groove through a rotating shaft;

[0011] A pressure support rod is fixedly connected to the support seat, and the pressure support rod is connected to the side wall of the support via a resisting spring.

[0012] Preferably, the snap-fit ​​assembly comprises an inserting rod fixedly connected to the end of the pressure-applying support rod, the end of the inserting rod is provided with a buckle, and the inner side wall of the earmuff frame is provided with a slot matched with the buckle.

[0013] Preferably, the assembly docking piece comprises a docking seat fixedly arranged inside the shielding earmuff, and the docking seat is provided with a terminal interface adapted to the terminal combination plate.

[0014] Preferably, a heat dissipation plate is arranged on the back of the sound insulation cotton pressure-resistant layer, a heat dissipation channel is provided inside the heat dissipation plate, two ends of the heat dissipation channel penetrate the terminal column and the side wall of the terminal combination plate, and are connected with a terminal tube, a butt joint tube inserted into the terminal tube is fixedly connected to the terminal combination plate, the inner side wall of the terminal combination plate is connected with a cross bar through a spring butt joint column, two ends of the cross bar respectively penetrate into the terminal tubes on both sides, and are fixedly connected with a blocking ring sleeved on the butt joint tube, and a connecting port is provided on the outer side wall of the butt joint tube;

[0015] The end pipe is provided with a rectangular opening for the cross bar to move, and the cross bar is provided with an isolation sheet to ensure the sealing of the rectangular opening.

[0016] Preferably, a heat dissipation pipe is arranged inside the metal heat conductive sheet, both ends of the heat dissipation pipe are connected to the delivery pipeline, the other end of the delivery pipeline passes through the earmuff frame and extends into the docking seat, and a fan-shaped closed layer is arranged inside the delivery pipeline at the docking seat.

[0017] Preferably, the magnetic drive component includes a drop-force opening opened on the earmuff frame, a sliding column is provided on the inner wall of the drop-force opening, the drop-force opening is connected to a magnetic block via a sleeve spring sleeved on the sliding column, the delivery pipelines are respectively distributed on both sides of the drop-force opening, and magnetic rings that are magnetically attracted to the magnetic block are arranged inside the delivery pipelines located on both sides of the drop-force opening, and a one-way closed layer is arranged inside the magnetic rings.

[0018] Preferably, the soundproof cover is provided with an assembly notch for the main frame to be assembled, and the side wall of the bracket seat is fixedly connected with an isolation compensation layer adapted to the assembly notch.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention provides a noise reduction earplug main body and a noise reduction earmuff main body, and can select the switching between the noise reduction earplug single use mode and the earplug and earmuff combined use mode according to the decibel size of the noise, thereby meeting the needs of hearing protection under different degrees of noise conditions.

[0021] 2. The present invention configures the earplug into a multiple noise reduction earplug body consisting of a silicone bonding layer, a sound insulation cotton pressure-resistant layer and a memory foam reset layer. The inner layer of memory foam is used to ensure the reset effect. The rear silicone bonding layer is used to ensure close contact with the ear canal skin and generate pressure on the sound insulation cotton pressure-resistant layer, thereby ensuring the effect of sound insulation and noise reduction.

[0022] 3. The present invention generates a driving force on the magnetic block through the movement of the wearer, thereby driving the magnetic ring in the heat dissipation duct to move, thereby continuously generating a driving force on the liquid in the heat dissipation duct. During the flow of the liquid, the heat in the multiple noise reduction earplug body will be brought out to the outside, thereby achieving effective heat dissipation of the multiple noise reduction earplug body and ensuring the heat dissipation effect in the combined use mode of the earplug and earmuff. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a combined hearing protection and noise reduction device proposed by the present invention;

[0024] Figure 2 This is a schematic structural diagram of a noise reduction earplug body in a combined hearing protection and noise reduction device proposed by the present invention;

[0025] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 4 This is a schematic structural diagram of multiple noise reduction earplug bodies in a combined hearing protection and noise reduction device proposed by the present invention;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the assembly docking parts in the combined hearing protection and noise reduction device proposed by the present invention;

[0028] Figure 6 This is a schematic cross-sectional structure diagram of an assembly docking piece in a combined hearing protection and noise reduction device proposed by the present invention;

[0029] Figure 7 This is a schematic diagram of the cross-sectional structure of the drop force outlet of a combined hearing protection and noise reduction device proposed by the present invention.

[0030] In the figure: 1. Matching cover; 2. Earmuff frame; 3. Shielding earmuff; 4. Soundproof cover; 5. Metal heat conductive sheet; 6. Delivery pipeline; 7. Silicone bonding layer; 8. Soundproof cotton pressure-resistant layer; 9. Memory foam reset layer; 10. Terminal column; 11. Telescopic column; 12. Terminal combination plate; 13. Bracket seat; 14. Connection groove; 15. Pressure support rod; 16. Plug rod; 17. Buckle; 18. Slot; 19. Docking seat; 20. Heat dissipation plate; 21. Terminal tube; 22. Resistance to docking tube; 23. Cross bar; 24. Blocking ring; 25. Connecting port; 26. Fan-shaped closing layer; 27. Falling force port; 28. Magnetic block; 29. ​​Magnetic ring; 30. One-way closing layer; 31. Assembly notch; 32. Isolation compensation layer; 33. Spring resistance column. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Example, see Figures 1 to 7 A combined hearing protection noise reduction device comprises a noise reduction earmuff body and a noise reduction earplug body used in conjunction therewith, wherein the noise reduction earplug body comprises a pair of matching covers 1, the two matching covers 1 are connected by a main frame, and multiple noise reduction earplug bodies are arranged on the matching covers 1;

[0035] Furthermore, the main frame includes a bracket and a bracket seat 13 connected to the matching cover 1, a connecting groove 14 is opened on the bracket seat 13, the end of the bracket is located in the connecting groove 14, and is rotatably connected to the inner wall of the connecting groove 14 through a rotating shaft, and a pressure support rod 15 is fixedly connected to the bracket seat 13, and the pressure support rod 15 is connected to the side wall of the bracket through a resisting spring.

[0036] It is worth noting that the resistance spring always applies outward pressure to the pressure support rod 15. The bracket seat 13, which is rotatably connected at both ends of the bracket, will cause the multiple noise reduction earplug bodies provided on the bracket seat 13 to always apply pressure to the ear canal under the action of the pressure support rod 15, thereby ensuring that under normal use, the multiple noise reduction earplug bodies can fit tightly into the ear canal to ensure the noise reduction effect.

[0037] The main body of the noise reduction earmuff comprises an earmuff frame 2 and shielding earmuffs 3 arranged at both ends of the earmuff frame 2, and the earmuff frame 2 is connected to the main frame through a snap-fit ​​assembly;

[0038] Furthermore, the snap-fit ​​assembly includes an inserting rod 16 fixedly connected to the end of the pressure support rod 15 , a buckle 17 is provided at the end of the inserting rod 16 , and a slot 18 matched with the buckle 17 is provided on the inner side wall of the earmuff frame 2 .

[0039] When it is necessary to combine, the buckle 17 and the slot 18 can be matched to achieve the corresponding combination between the two. The structure is made of plastic material and has plasticity, so the combination of the clamping assembly can be performed after the assembly of the docking parts is completed to ensure that the assembly docking parts will not fall off;

[0040] The shielding earmuff 3 is provided with an assembly docking piece connected to the multiple noise reduction earplug body inside, and a soundproof cover body 4 is provided on the shielding earmuff 3. An assembly notch 31 for assembly with the main frame is opened on the soundproof cover body 4, and an isolation compensation layer 32 adapted to the assembly notch 31 is fixedly connected to the side wall of the bracket seat 13, which can ensure the sound insulation effect of the soundproof cover body 4 when used after assembly.

[0041] A metal heat conducting sheet 5 is provided at the center of the earmuff frame 2, and the metal heat conducting sheet 5 is connected to the card assembly docking piece through a delivery pipeline 6;

[0042] Furthermore, a heat dissipation pipe is provided inside the metal heat conductive sheet 5, and both ends of the heat dissipation pipe are connected to the delivery pipe 6. The other end of the delivery pipe 6 passes through the earmuff frame 2 and extends into the docking seat 19. A fan-shaped closed layer 26 is provided inside the delivery pipe 6 located at the docking seat 19.

[0043] The metal heat conductive sheet 5 can volatilize the heat, thereby taking out the heat from the multiple noise reduction earplug body for volatilization, achieving the effect of heat dissipation.

[0044] Furthermore, the assembly docking piece includes a docking seat 19 fixedly arranged inside the shielding earmuff 3 , and a terminal interface adapted to the terminal assembly plate 12 is provided on the docking seat 19 .

[0045] Furthermore, a heat dissipation plate 20 is arranged on the back of the sound insulation cotton pressure-resistant layer 8, and a heat dissipation channel is opened inside the heat dissipation plate 20. The two ends of the heat dissipation channel penetrate the terminal column 10 and the side wall of the terminal combination plate 12, and are connected with the terminal tube 21. The terminal combination plate 12 is fixedly connected with a butt-joint tube 22 inserted into the terminal tube 21. The inner side wall of the terminal combination plate 12 is connected with a cross bar 23 through a spring butt-joint column 33. The two ends of the cross bar 23 respectively penetrate into the terminal tubes 21 on both sides, and are fixedly connected with a blocking ring 24 sleeved on the butt-joint tube 22. A connecting port 25 is opened on the outer side wall of the butt-joint tube 22;

[0046] When the docking seat 19 is combined with the terminal combination disk 12, the spring resistance column 33 connected thereto will be squeezed, so that the spring resistance column 33 drives the cross bar 23 to move inward, thereby driving the blocking rings 24 connected on both sides thereof to move, thereby opening the connecting port 25 previously blocked by the blocking ring 24, and realizing the connection between the terminal tube 21 and the resistance docking tube 22.

[0047] The end pipe 21 is provided with a rectangular opening for the cross bar 23 to move, and the cross bar 23 is provided with an isolation sheet to ensure the sealing of the rectangular opening.

[0048] It should be noted that since a rectangular opening is provided on the end pipe 21, liquid leakage may easily occur, and therefore an isolation plate is provided on the cross bar 23. The setting of the isolation plate can always effectively seal the rectangular opening on the end pipe 21 to avoid liquid leakage.

[0049] The earmuff frame 2 is provided with a magnetic driving component on both sides thereof for pushing the heat dissipation liquid in the delivery pipeline 6 to flow. The magnetic driving component includes a force-dropping opening 27 opened on the earmuff frame 2. A sliding column is provided on the inner wall of the force-dropping opening 27. The force-dropping opening 27 is connected to a magnetic block 28 via a sleeve spring sleeved on the sliding column. The delivery pipelines 6 are respectively distributed on both sides of the force-dropping opening 27. Magnetic rings 29 that are magnetically attracted to the magnetic block 28 are provided inside the delivery pipelines 6 located on both sides of the force-dropping opening 27. A one-way closed layer 30 is provided inside the magnetic ring 29. The one-way closed layers 30 located on both sides of the force-dropping opening 27 are arranged oppositely.

[0050] The one-way closed layer 30 is a fan-shaped conical silicone material. When it moves along the cone, the one-way closed layer 30 is in an open state and will not push the liquid in the heat dissipation duct. When it moves against the cone, the one-way closed layer 30 is in a closed state and will push the liquid in the heat dissipation duct, thereby achieving continuous transportation of the liquid in the heat dissipation duct.

[0051] It should be noted that when the wearer is exercising, the movement will cause the magnetic block 28 supported by the spring to move due to the inertia of gravity, and in the process of movement, it will drive the magnetic ring 29 in the heat dissipation duct to move, thereby continuously generating a driving force for the liquid in the heat dissipation duct, and realizing the flow of the liquid in the heat dissipation duct. In the process of liquid flow, the heat in the multiple noise reduction earplug body will be brought out, thereby achieving effective heat dissipation of the multiple noise reduction earplug body.

[0052] The multiple noise reduction earplug body is composed of a silicone bonding layer 7 located at the rear end, a sound insulation cotton pressure-resistant layer 8 located in the middle and a memory foam reset layer 9 located at the front end. The sound insulation cotton pressure-resistant layer 8 is provided with a layer of corresponding grooves adapted to the memory foam reset layer 9, and the silicone bonding layer 7 is provided with two layers of corresponding grooves adapted to the sound insulation cotton pressure-resistant layer 8. The sound insulation cotton pressure-resistant layer 8 is fixedly connected with a terminal column 10, and the memory foam reset layer 9 is connected to the terminal column 10 through a telescopic column 11. The silicone bonding layer 7 is pasted on the matching cover 1, and the terminal column 10 extends outward through the silicone bonding layer 7 and is connected with a terminal combination plate 12.

[0053] It is worth noting that the memory foam reset layer 9 at the front end extends into the ear canal when in use. The setting of the memory foam can ensure its reset effect. The silicone bonding layer 7 at the rear end will produce an adhesion effect with the ear canal, and the pressure generated will produce pressure on the sound insulation cotton pressure-resistant layer 8, thereby ensuring the sound insulation effect of the sound insulation cotton pressure-resistant layer 8 and the noise reduction effect of the multiple noise reduction earplugs.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A combined hearing protection and noise reduction device, characterized in that: It comprises a noise reduction earmuff main body and a noise reduction earplug main body used in conjunction with the earmuff main body, wherein the noise reduction earplug main body comprises a matching cover (1) arranged in pairs, the two matching covers (1) are connected via a main frame, and the matching covers (1) are provided with multiple noise reduction earplug bodies; The noise reduction earmuff main body comprises an earmuff frame (2) and shielding earmuffs (3) arranged at both ends of the earmuff frame (2); the earmuff frame (2) is connected to the main frame by a snap-fit ​​assembly; an assembly docking piece connected to a multiple noise reduction earplug body is arranged inside the shielding earmuff (3); a soundproof cover body (4) is arranged on the shielding earmuff (3); a metal heat conductive sheet (5) is arranged at the center of the earmuff frame (2); the metal heat conductive sheet (5) is connected to the snap-fit ​​assembly docking piece through a conveying pipeline (6); and magnetic drive components for pushing the heat dissipation liquid in the conveying pipeline (6) to flow are arranged on both sides of the earmuff frame (2); The multiple noise reduction earplug body is composed of a silicone bonding layer (7) located at the rear end, a sound insulation cotton pressure-resistant layer (8) located in the middle, and a memory cotton reset layer (9) located at the front end. The sound insulation cotton pressure-resistant layer (8) is provided with a layer of corresponding grooves adapted to the memory cotton reset layer (9), and the silicone bonding layer (7) is provided with two layers of corresponding grooves adapted to the sound insulation cotton pressure-resistant layer (8).

2. A combined hearing protection and noise reduction device according to claim 1, characterized in that: The sound insulation cotton pressure-resistant layer (8) is fixedly connected to a terminal column (10), the memory cotton reset layer (9) is connected to the terminal column (10) via a telescopic column (11), the silicone bonding layer (7) is adhesively arranged on the matching cover (1), the terminal column (10) penetrates the silicone bonding layer (7) and extends outward, and is connected to a terminal combination plate (12).

3. A combined hearing protection and noise reduction device according to claim 1, characterized in that: The main frame body comprises a bracket and a bracket seat (13) connected to the matching cover (1); a connecting groove (14) is provided on the bracket seat (13); an end of the bracket is located in the connecting groove (14) and is rotatably connected to the inner wall of the connecting groove (14) via a rotating shaft; A pressure support rod (15) is fixedly connected to the support seat (13), and the pressure support rod (15) is connected to the side wall of the support via a resisting spring.

4. A combined hearing protection and noise reduction device according to claim 1, characterized in that: The snap-fit ​​assembly comprises a plug-in rod (16) fixedly connected to the end of a pressure support rod (15), a buckle (17) is provided at the end of the plug-in rod (16), and a slot (18) adapted to the buckle (17) is provided on the inner side wall of the earmuff frame (2).

5. A combined hearing protection and noise reduction device according to claim 2, characterized in that: The assembly docking piece comprises a docking seat (19) fixedly arranged inside the shielding earmuff (3), and a terminal interface adapted to the terminal assembly plate (12) is provided on the docking seat (19).

6. A combined hearing protection and noise reduction device according to claim 1, characterized in that: A heat dissipation plate (20) is arranged on the back of the sound insulation cotton pressure-resistant layer (8), and a heat dissipation channel is provided inside the heat dissipation plate (20). Two ends of the heat dissipation channel penetrate the terminal column (10) and the side wall of the terminal assembly plate (12), and are connected to the terminal tube (21). The terminal assembly plate (12) is fixedly connected with a butt-joint tube (22) inserted into the terminal tube (21). The inner side wall of the terminal assembly plate (12) is connected with a cross bar (23) through a spring butt-joint column (33). Two ends of the cross bar (23) respectively penetrate into the terminal tubes (21) on both sides, and are fixedly connected with a blocking ring (24) sleeved on the butt-joint tube (22). The outer side wall of the butt-joint tube (22) is provided with a connecting opening (25); The end pipe (21) is provided with a rectangular opening for the cross bar (23) to move, and the cross bar (23) is provided with an isolation sheet to ensure the sealing of the rectangular opening.

7. The combined hearing protection and noise reduction device according to claim 1, characterized in that: A heat dissipation pipe is arranged inside the metal heat conductive sheet (5), and both ends of the heat dissipation pipe are connected to a delivery pipe (6). The other end of the delivery pipe (6) passes through the earmuff frame (2) and extends into the docking seat (19). A fan-shaped closed layer (26) is arranged inside the delivery pipe (6) located at the docking seat (19).

8. The combined hearing protection and noise reduction device according to claim 1, characterized in that: The magnetic driving component comprises a drop force opening (27) opened on the earmuff frame (2), the inner wall of the drop force opening (27) is provided with a sliding column, the drop force opening (27) is connected to a magnetic block (28) via a sleeve spring sleeved on the sliding column, the delivery pipeline (6) is respectively distributed on both sides of the drop force opening (27), and magnetic rings (29) magnetically attracted to the magnetic block (28) are arranged inside the delivery pipelines (6) located on both sides of the drop force opening (27), and a one-way closed layer (30) is arranged inside the magnetic ring (29).

9. A combined hearing protection and noise reduction device according to claim 2, characterized in that: The soundproof cover (4) is provided with an assembly notch (31) for assembly with the main frame, and the side wall of the bracket seat (13) is fixedly connected with an isolation compensation layer (32) adapted to the assembly notch (31).

Images