Anti-falling protection device for slowly descending building dismounting platform

Abstract

The invention discloses an anti-falling protection device for a slowly-descending building dismounting platform, and relates to the technical field of building dismounting lifting platforms, the anti-falling protection device comprises a shell and a winding shaft arranged in the shell, a coil spring is arranged on the inner wall of the shell, one end of the winding shaft is rotationally arranged on the inner wall of the shell through the coil spring, a safety belt is wound on the winding shaft, and the safety belt is arranged on the inner wall of the shell. The other end of the winding shaft is fixedly connected with a linkage disc, a transmission disc is rotationally connected into the shell, a centrifugal connecting assembly is arranged in the linkage disc, and when the linkage disc is in an accelerated rotation state, the linkage disc is connected with the transmission disc through the centrifugal connecting assembly. And an optimal descending scheme is provided for workers, and the safety performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building demolition lifting platforms, and in particular to an anti-falling protection device for slowly descending building demolition platforms. Background Art

[0002] A lifting platform is a multifunctional lifting and loading and unloading mechanical equipment, and also refers to equipment for vertical transportation in logistics systems such as factories and automatic warehouses. The lifting platform is often also equipped with various flat conveying equipment. As a connecting device for conveyor lines at different heights, ordinary lifting platforms are not convenient to use, so a rail-type lifting platform is needed to transport goods. However, there are still various problems with the various rail-type lifting platforms on the market.

[0003] After searching, a Chinese patent with publication number CN220412809U discloses a lifting platform anti-falling device, including a lifting plate, the upper surface of the lifting plate is fixedly connected to a vertical plate, the upper surface of the vertical plate is fixedly connected to a top seat, the outer surface of the top seat is fixedly connected to a protrusion, and the outer surface of the movable inner rod is movably connected to an outer sleeve. In the lifting process of the lifting platform anti-falling device, the rebound force of the buffer spring buffers the falling force. Due to the existence of the limit slider and the slide frame, the lifting plate will not move left and right, the rebound range is limited and the rebound force is consumed, so that the lifting plate slowly and steadily falls on the bottom plate, thereby providing buffer protection for the lifting platform that accidentally falls when a failure occurs, thereby avoiding injuries to the platform and the goods or workers on the platform.

[0004] However, the above patent still has the following problems:

[0005] When the platform or workers are descending out of control, the force of the instantaneous deceleration cannot be adjusted. If the instantaneous deceleration is too fast, it is easy to cause injuries to the workers. If the instantaneous deceleration is too slow, it will cause the descent time to be too long. Therefore, a fall protection device for the slow-descent demolition platform is needed. Summary of the invention

[0006] The object of the present invention is to provide an anti-falling protection device for a slow-descending building demolition platform to solve the problems raised in the above-mentioned background technology.

[0007] The technical solution of the present invention is: an anti-falling protection device for a slow-descending building demolition platform, comprising a shell and a winding shaft arranged in the shell, the inner wall of the shell is provided with a coil spring, one end of the winding shaft is rotatably arranged on the inner wall of the shell through the coil spring, a safety belt is wound on the winding shaft, the other end of the winding shaft is fixedly connected with a linkage disk, a transmission disk is rotatably connected in the shell, a centrifugal connection component is arranged in the linkage disk, and when the linkage disk is in an accelerated rotation state, the linkage disk is connected to the transmission disk through the centrifugal connection component;

[0008] A brake assembly is also arranged in the shell, and the brake assembly includes a brake disc and a drive unit, and the brake disc abuts against the side wall of the transmission disc.

[0009] Preferably, the driving unit includes a pressure adapter assembly and a bracket plate, one side of the bracket plate is fixedly connected to the brake disc, and the other side of the bracket plate is provided with a sleeve, a spring is provided in the sleeve, and a screw column is also embedded and connected in the sleeve, and the spring is located between the screw column and the inner wall of the sleeve, and the pressure adapter assembly is used to adjust the screw column to move linearly in the sleeve according to the height.

[0010] Preferably, the pressure adapter assembly includes a screw sleeve, a telescopic rod and a connecting rope, one end of the telescopic rod is fixed to the inner wall of the shell, the screw sleeve is rotatably arranged in the shell, the screw sleeve is threadedly connected to the screw column, one end of the telescopic rod is fixedly connected to the end face of the screw column, a connecting plate is fixedly connected to the outer peripheral wall of the screw sleeve, a transmission gear is fixedly connected to the connecting plate, a reduction gear box is provided on the shell, an output gear is fixedly connected to the output shaft at one end of the reduction gear box, and the output gear is meshingly connected to the transmission gear.

[0011] Preferably, a winding shell is provided on one side of the reduction gear box, a rotating shaft is rotatably connected inside the winding shell, one end of the rotating shaft is fixedly connected to the input shaft of the reduction gear box, and the connecting rope is wound on the rotating shaft.

[0012] Preferably, the centrifugal connection assembly includes a hook, a mounting opening is provided in the linkage disk, the hook is elastically arranged in the mounting opening, and a plurality of teeth are fixedly connected to the inner peripheral wall of the transmission disk.

[0013] Preferably, two support rods are fixedly connected to the inner wall of the shell, a slide groove is opened at one end of the screw rod sleeve, the support rod is inserted into the slide groove, and the support rod is slidably connected to the slide groove.

[0014] Preferably, slide plates are symmetrically fixedly connected to both sides of the bracket plate, and a slot is provided in the shell, and the slide plates are slidably arranged in the slot.

[0015] Preferably, a mounting ear is fixedly connected to the outer peripheral wall of the transmission plate, an annular ear groove is provided in the shell, and the mounting ear is rotatably arranged in the ear groove.

[0016] Preferably, an outlet for leaking the safety belt is provided at the bottom of the shell, and two rollers are symmetrically rotatably connected to the outlet. Two clamping plates are symmetrically fixedly connected to the outer wall of the shell, and bolt holes are provided on the clamping plates.

[0017] Preferably, the shell is a detachable split structure.

[0018] The present invention provides an anti-falling protection device for a slow-down building demolition platform through improvement, which has the following improvements and advantages compared with the prior art:

[0019] First, one end of the safety belt of the present invention is used to bind the worker, and the shell is installed on the lifting platform. Under normal circumstances, the worker can move normally on the lifting platform, and the safety belt is slowly released with the normal movement of the worker; when the worker falls from the lifting platform, the reel rotates faster, and the centrifugal connection component is connected to the transmission disc at this time. The drive unit controls the brake disc to squeeze the transmission disc, so that the transmission disc slows down. The transmission disc controls the linkage disc to slow down through the centrifugal connection component, thereby limiting the speed at which the worker falls and protects the worker.

[0020] Secondly, when the lifting platform of the present invention is in a high position, the distance that the lead screw column moves into the sleeve is short, that is, the elastic deformation of the spring is small, and the elastic extrusion force exerted on the sleeve and the bracket plate is small, that is, the extrusion friction force of the brake disc on the transmission disc is small. When the worker falls, the instantaneous braking force when the transmission disc is connected with the linkage disc is small, and the harm to the worker is reduced. Because when falling from a high position, the worker has sufficient space to slow down and fall. Therefore, through a smaller instantaneous braking force and sufficient deceleration space, the harm to the worker can be reduced while ensuring the safe landing of the worker.

[0021] Thirdly, when the lifting platform of the present invention is in a low position, the distance that the lead screw column moves into the sleeve is long, that is, the elastic deformation of the spring is large, and the elastic extrusion force exerted on the sleeve and the bracket plate is large, that is, the extrusion friction force of the brake disc on the transmission disc is large. When a worker falls, the instantaneous braking force when the transmission disc is connected with the linkage disc is large. The worker is decelerated within a limited height to ensure his safety.

[0022] Fourthly, the present invention can automatically adjust the instantaneous braking force according to the height at which the worker falls, providing the worker with the best descent plan and improving safety performance.

[0023] Fifthly, the housing of the present invention is a detachable split structure, which is convenient for disassembly and assembly of the housing and the internal structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the invention;

[0026] Figure 2 It is a plan view of the linkage disk and the transmission disk of the invention;

[0027] Figure 3 A first perspective perspective schematic diagram of the internal structure of the housing of the present invention;

[0028] Figure 4 A second perspective perspective schematic diagram of the internal structure of the housing of the present invention;

[0029] Figure 5 It is a plan view of the sleeve and the screw rod column of the present invention;

[0030] Figure 6 It is a schematic cross-sectional view of the sleeve of the present invention;

[0031] Figure 7 for Figure 6 A in the enlarged view;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the shell of the present invention.

[0033] In the figure: 1. shell; 2. take-up shaft; 201. safety belt; 202. linkage plate; 203. transmission plate; 204. brake disc; 205. bracket plate; 206. sleeve; 207. spring; 208. screw column; 209. screw sleeve; 210. telescopic rod; 211. connecting rope; 212. connecting plate; 213. transmission gear; 214. reduction gear box; 215. output gear; 216. take-up shell; 3. hook; 301. tooth; 4. support rod; 401. slide groove; 5. slide plate; 6. mounting ear; 601. ear groove; 7. roller; 8. clamping plate; 801. bolt mouth. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0035] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0036] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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.

[0039] like Figure 1-Figure 8 As shown, the present invention provides an anti-falling protection device for a slow-descending building demolition platform, comprising a shell 1 and a reel 2 arranged in the shell 1, a coil spring is arranged on the inner wall of the shell 1, one end of the reel 2 is rotatably arranged on the inner wall of the shell 1 through the coil spring, a safety belt 201 is rolled up on the reel 2, and a linkage disk 202 is fixedly connected to the other end of the reel 2, a transmission disk 203 is rotatably connected in the shell 1, a centrifugal connection assembly is arranged in the linkage disk 202, and when the linkage disk 202 is in an accelerated rotation state, the linkage disk 202 is connected to the transmission disk 203 through the centrifugal connection assembly;

[0040] A brake assembly is also disposed in the housing 1 . The brake assembly includes a brake disc 204 and a drive unit. The brake disc 204 abuts against a side wall of the transmission disc 203 .

[0041] Specifically: one end of the safety belt 201 is used to bind the worker, and the housing 1 is installed on the lifting platform. Under normal circumstances, the worker can move normally on the lifting platform, and the safety belt 201 is slowly released as the worker moves normally;

[0042] When a worker falls from the lifting platform, the winding shaft 2 accelerates its rotation. At this time, the centrifugal connection assembly is connected to the transmission disc 203. The driving unit controls the brake disc 204 to squeeze the transmission disc 203, so that the transmission disc 203 slows down. The transmission disc 203 controls the linkage disc 202 to slow down through the centrifugal connection assembly, thereby limiting the speed at which the worker falls and protecting the worker.

[0043] The driving unit includes a pressure adapter assembly and a bracket plate 205. One side of the bracket plate 205 is fixedly connected to the brake disc 204. A sleeve 206 is provided on the other side of the bracket plate 205. A spring 207 is provided in the sleeve 206. A screw column 208 is also embedded in the sleeve 206 and connected. The spring 207 is located between the screw column 208 and the inner wall of the sleeve 206. The pressure adapter assembly is used to adjust the screw column 208 to move linearly in the sleeve 206 according to the height.

[0044] Specifically: the pressure adapter assembly is used to adjust the moving distance of the screw column 208 in the sleeve 206;

[0045] When the lifting platform is at a high position, the distance that the screw column 208 moves into the sleeve 206 is short, that is, the elastic deformation of the spring 207 is small, and the elastic extrusion force on the sleeve 206 and the bracket plate 205 is small, that is, the extrusion friction force of the brake disc 204 on the transmission disc 203 is small. When the worker falls, the instantaneous braking force when the transmission disc 203 is connected with the linkage disc 202 is small, and the harm to the worker is reduced. Because when falling from a high position, the worker has sufficient space to slow down. Therefore, through a smaller instantaneous braking force and sufficient deceleration space, it can reduce the harm to the worker while ensuring the safe landing of the worker;

[0046] When the lifting platform is at a low position, the distance that the screw column 208 moves into the sleeve 206 is long, that is, the elastic deformation of the spring 207 is large, and the elastic extrusion force on the sleeve 206 and the bracket plate 205 is large, that is, the extrusion friction force of the brake disc 204 on the transmission disc 203 is large. When the worker falls, the instantaneous braking force when the transmission disc 203 is connected with the linkage disc 202 is large. Within a limited height, the worker is decelerated to ensure the worker's safety;

[0047] It is understandable that: according to the height from which the worker falls, the instantaneous braking force can be adjusted automatically to provide the worker with the best descent plan and improve safety performance.

[0048] The pressure adapter assembly includes a screw sleeve 209, a telescopic rod 210 and a connecting rope 211. One end of the telescopic rod 210 is fixed on the inner wall of the shell 1, and the screw sleeve 209 is rotatably arranged in the shell 1. The screw sleeve 209 is threadedly connected to the screw column 208. One end of the telescopic rod 210 is fixedly connected to the end face of the screw column 208. A connecting plate 212 is fixedly connected to the outer peripheral wall of the screw sleeve 209, and a transmission gear 213 is fixedly connected to the connecting plate 212. A reduction gear box 214 is arranged on the shell 1, and an output gear 215 is fixedly connected to the output shaft at one end of the reduction gear box 214, and the output gear 215 is meshed with the transmission gear 213.

[0049] A winding shell 216 is provided on one side of the reduction gear box 214. A rotating shaft is rotatably connected inside the winding shell 216. One end of the rotating shaft is fixedly connected to the input shaft of the reduction gear box 214. The connecting rope 211 is wound around the rotating shaft.

[0050] Specifically: the end of the connecting rope 211 is connected to the ground. As the lifting platform moves up and down, the connecting rope 211 will pull the rotating shaft to rotate. The rotating shaft is arranged in the winding shell 216 through a winding spring. The winding spring is used for the reset rotation of the rotating shaft, that is, for the automatic winding of the connecting rope 211.

[0051] The rotating shaft drives the reduction gear box 214 and the output gear 215 to rotate, the output gear 215 drives the transmission gear 213 to rotate, the transmission gear 213 drives the screw sleeve 209 to rotate, the screw sleeve 209 drives the screw column 208 to move back and forth in a straight line, thereby realizing the above-mentioned change in friction force. The telescopic rod 210 is used to limit the rotation of the screw column 208, and the telescopic rod 210 is composed of two rod body structures slidably connected, thereby adapting to the linear reciprocating movement of the screw column 208.

[0052] The centrifugal connection assembly includes a hook 3, and an installation opening is opened in the linkage disk 202. The hook 3 is elastically arranged in the installation opening. A plurality of teeth 301 are fixedly connected to the inner circumferential wall of the transmission disk 203. When the worker falls, the hook 3 flies out of the installation opening under the action of centrifugal force, and the hook 3 is engaged with the teeth 301, thereby realizing the connection between the linkage disk 202 and the transmission disk 203.

[0053] Two support rods 4 are fixedly connected to the inner wall of the shell 1, and a slide groove 401 is opened at one end of the screw sleeve 209. The support rod 4 is inserted into the slide groove 401, and the support rod 4 is slidably connected to the slide groove 401. The screw sleeve 209 is supported by the support rod 4 and is guaranteed to be able to rotate.

[0054] The bracket plate 205 is symmetrically fixedly connected with slide plates 5 on both sides. A card slot is opened in the shell 1, and the slide plates 5 are slidably set in the card slot. The bracket plate 205 is slidably set in the card slot through the slide plates 5 to achieve the installation of the bracket plate 205.

[0055] A mounting ear 6 is fixedly connected to the outer peripheral wall of the transmission plate 203 , and an annular ear groove 601 is provided in the housing 1 , and the mounting ear 6 is rotatably arranged in the ear groove 601 .

[0056] An outlet for the safety belt 201 to leak out is provided at the bottom of the shell 1, and two rollers 7 are symmetrically rotatably connected to the outlet. Two clamping plates 8 are symmetrically fixedly connected to the outer wall of the shell 1, and bolt openings 801 are provided on the clamping plates 8. The installation belt 201 is pulled out from the outlet and then connected to the worker. The safety belt 201 passes between the two rollers 7 to reduce the wear of the safety belt 201 when it is retracted and released. The two clamping plates 8 can be fixed to the lifting platform by bolts to realize the connection between the shell 1 and the lifting platform.

[0057] The housing 1 is a detachable split structure, which facilitates the disassembly and assembly of the housing 1 and the assembly of the internal structure.

[0058] Working principle: One end of the safety belt 201 is used to bind the worker, and the housing 1 is installed on the lifting platform. Under normal circumstances, the worker can move normally on the lifting platform, and the safety belt 201 is slowly released as the worker moves normally;

[0059] When the worker falls from the lifting platform, the winding shaft 2 accelerates and rotates. When the worker falls, the hook 3 flies out from the installation opening under the action of centrifugal force, and the hook 3 engages with the tooth 301, thereby achieving the connection between the linkage disk 202 and the transmission disk 203;

[0060] The pressure adapter assembly is used to adjust the moving distance of the screw column 208 in the sleeve 206; when the lifting platform is at a high position, the moving distance of the screw column 208 into the sleeve 206 is short, that is, the elastic deformation of the spring 207 is small, and the elastic extrusion force of the sleeve 206 and the bracket plate 205 is small, that is, the extrusion friction force of the brake disc 204 on the transmission disc 203 is small. When the worker falls, the instantaneous braking force when the transmission disc 203 is connected with the linkage disc 202 is small, and the harm to the worker is reduced, because when falling from a high position, the worker has sufficient space to slow down and fall, so through a smaller instantaneous braking force and sufficient deceleration space, it can reduce the harm to the worker while ensuring the safe landing of the worker;

[0061] When the lifting platform is at a low position, the distance that the screw column 208 moves into the sleeve 206 is long, that is, the elastic deformation of the spring 207 is large, and the elastic extrusion force on the sleeve 206 and the bracket plate 205 is large, that is, the extrusion friction force of the brake disc 204 on the transmission disc 203 is large. When the worker falls, the instantaneous braking force when the transmission disc 203 is connected with the linkage disc 202 is large. Within a limited height, the worker is decelerated to ensure the worker's safety;

[0062] The present invention can automatically adjust the instantaneous braking force according to the height of the worker when falling, provide the worker with the best descent plan, and improve safety performance.

[0063] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fall prevention device for a slow-descending building demolition platform, comprising a housing (1) and a winding shaft (2) arranged in the housing (1), characterized in that: The inner wall of the shell (1) is provided with a coil spring, one end of the reel (2) is rotatably arranged on the inner wall of the shell (1) through the coil spring, a safety belt (201) is rolled up on the reel (2), the other end of the reel (2) is fixedly connected with a linkage disk (202), a transmission disk (203) is rotatably connected in the shell (1), a centrifugal connection component is arranged in the linkage disk (202), and when the linkage disk (202) is in an accelerated rotation state, the linkage disk (202) is connected to the transmission disk (203) through the centrifugal connection component; A brake assembly is also provided in the housing (1), the brake assembly comprising a brake disc (204) and a drive unit, the brake disc (204) abutting against a side wall of the transmission disc (203).

2. The anti-falling protection device for the slow-descending building demolition platform according to claim 1 is characterized by: The drive unit comprises a pressure adapter component and a bracket plate (205), one side of the bracket plate (205) is fixedly connected to the brake disc (204), and the other side of the bracket plate (205) is provided with a sleeve (206), a spring (207) is provided in the sleeve (206), and a screw column (208) is also embedded and connected in the sleeve (206), and the spring (207) is located between the screw column (208) and the inner wall of the sleeve (206), and the pressure adapter component is used to adjust the screw column (208) to move linearly in the sleeve (206) according to the height.

3. The anti-falling protection device for the slow-descending building demolition platform according to claim 2 is characterized by: The pressure adapter assembly comprises a screw sleeve (209), a telescopic rod (210) and a connecting rope (211); one end of the telescopic rod (210) is fixed on the inner wall of the housing (1); the screw sleeve (209) is rotatably arranged in the housing (1); the screw sleeve (209) is threadedly connected to the screw column (208); one end of the telescopic rod (210) is fixedly connected to the end surface of the screw column (208); a connecting plate (212) is fixedly connected to the outer peripheral wall of the screw sleeve (209); a transmission gear (213) is fixedly connected to the connecting plate (212); a reduction gear box (214) is arranged on the housing (1); an output gear (215) is fixedly connected to the output shaft at one end of the reduction gear box (214); the output gear (215) is meshingly connected to the transmission gear (213).

4. The anti-falling protection device for the slow-descending building demolition platform according to claim 3 is characterized by: A winding shell (216) is provided on one side of the reduction gear box (214), a rotating shaft is rotatably connected inside the winding shell (216), one end of the rotating shaft is fixedly connected to the input shaft of the reduction gear box (214), and the connecting rope (211) is wound around the rotating shaft.

5. The anti-falling protection device for the slow-descending building demolition platform according to claim 1 is characterized by: The centrifugal connection assembly comprises a hook (3), a mounting opening is provided in the linkage disk (202), the hook (3) is elastically arranged in the mounting opening, and a plurality of teeth (301) are fixedly connected to the inner peripheral wall of the transmission disk (203).

6. The anti-falling protection device for the slow-descending building demolition platform according to claim 3 is characterized by: Two support rods (4) are fixedly connected to the inner wall of the housing (1); a slide groove (401) is provided at one end of the screw sleeve (209); the support rod (4) is inserted into the slide groove (401), and the support rod (4) is slidably connected to the slide groove (401).

7. The anti-falling protection device for the slow-descending building demolition platform according to claim 2 is characterized by: Slide plates (5) are symmetrically fixedly connected to both sides of the support plate (205); a slot is provided in the housing (1), and the slide plates (5) are slidably arranged in the slot.

8. The anti-falling protection device for the slow-descending building demolition platform according to claim 1 is characterized by: A mounting ear (6) is fixedly connected to the outer peripheral wall of the transmission plate (203), an annular ear groove (601) is provided in the housing (1), and the mounting ear (6) is rotatably arranged in the ear groove (601).

9. The anti-falling protection device for the slow-descending building demolition platform according to claim 1 is characterized by: The bottom of the shell (1) is provided with an outlet for the safety belt (201) to leak out, and two rollers (7) are symmetrically rotatably connected to the outlet. Two clamping plates (8) are symmetrically fixedly connected to the outer wall of the shell (1), and the clamping plates (8) are provided with bolt openings (801).

10. The anti-falling protection device for the slow-descending building demolition platform according to claim 1 is characterized by: The housing (1) is a detachable split structure.

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