Metal mold processing equipment for precast concrete

Abstract

The invention relates to the technical field of concrete prefabricated part machining, and discloses concrete prefabricated part metal mold machining equipment which comprises a clamping body, adsorption bodies and a moving part, the clamping body is used for clamping a reinforcing plate, the two adsorption bodies are symmetrically arranged, and the adsorption bodies are used for being fixed to a metal mold in an adsorption mode; the clamping main body and the adsorption main body are arranged on the base and can rotate to be attached to a mold with the shape within a certain range, and the moving part is used for connecting the clamping main body and the adsorption main body so that the adsorption main body can be close to or away from the metal mold. The groove of the clamping body and the multiple clamping devices can rapidly clamp the metal plate body, manual supporting is replaced, and the problems that due to the fact that the plate body is too heavy, the labor intensity is large, and the safety risk is high are solved. And the positioning cushion block is matched with the moving rod, so that the adsorption main body is prevented from sliding down when the equipment is operated downwards, and the stability under complex postures is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of concrete prefabricated part processing, and in particular to a metal mold processing device for concrete prefabricated parts. Background Art

[0002] In the construction industry, precast concrete parts are widely used in various construction projects due to their advantages such as convenient construction and stable quality. As a key tool for producing precast concrete parts, the quality and performance of metal molds have a decisive influence on the molding accuracy and structural strength of precast parts.

[0003] In order to ensure that the metal mold can withstand external forces such as pressure and vibration during the concrete pouring process and maintain a stable shape during long-term use, the mold needs to be structurally strengthened. Currently, the more common strengthening method is to weld a reinforcement plate on the outside of the metal mold.

[0004] The existing metal mold reinforcement plate welding operation mainly adopts manual operation. Workers need to directly support the heavy metal reinforcement plate to the mold surface by hand and keep it stable for welding. Since the reinforcement plate is usually made of heavy metal materials and has a large mass, the workers have extremely high labor intensity and are prone to fatigue during the long-term support process. This not only leads to low work efficiency and prolongs the processing cycle of the mold, but also increases the risk of operational errors due to factors such as workers' lack of concentration and decreased hand stability after fatigue. Once the worker loses his hand during the support process, the reinforcement plate falls, which may cause serious injuries to the worker himself or the surrounding people and other safety accidents. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a metal mold processing device for concrete precast parts, which can clamp a reinforcing plate and stably fix it on the mold surface to assist workers in welding the metal mold reinforcing plate.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A metal mold processing equipment for concrete prefabricated parts includes a clamping body, an adsorption body and a moving part. The clamping body is used to clamp a reinforcement plate. Two adsorption bodies are symmetrically provided. The adsorption bodies are used to be adsorbed and fixed to the metal mold, and can be rotated to fit the mold with a certain range of shapes. The moving part is used to connect the clamping body and the adsorption body so that the adsorption body can approach or move away from the metal mold. A force sensor, a control module and a relay module are arranged in the clamping body. A buzzer, an indicator light and a switch assembly are arranged on the clamping body. The connecting shell is the main supporting structure of the clamping body. The groove thereon is used to place the reinforcement plate. A clamping device is installed in the placement groove in the groove. The clamping device can be a pneumatic clamp or a mechanical clamp, etc. By operating the control device, the clamping device can quickly clamp or release the reinforcement plate to achieve a firm clamping of the plate body.

[0007] Preferably, the clamping body includes a connecting shell, a groove is provided on the connecting shell, a placement groove is provided in the groove, a clamping device is installed in the placement groove, and the clamping device is used to clamp the reinforcing plate. The clamping device can be a pneumatic clamp or a mechanical clamp, etc. By operating the control device, the clamping device can quickly clamp or release the reinforcing plate to achieve firm clamping of the plate body. The force sensor is provided on the clamp when setting, and can directly detect the weight of the reinforcing plate.

[0008] Preferably, the connecting shell is also provided with an installation groove, in which a sliding assembly is provided for cooperating with the moving part to realize the movement of the adsorption body. The sliding assembly is a slide rail structure that can withstand sufficient weight, providing guidance and support for the movement of the adsorption body, thereby ensuring that the adsorption body moves smoothly and the path is precise.

[0009] Preferably, the adsorption body includes a mounting shell and an electromagnetic component that can generate magnetic force to adsorb on the metal mold, the electromagnetic component is installed on the mounting shell, the mounting shell is connected to the moving part through a rotating adjustment structure, and the mounting shell of the adsorption body is connected to the moving part through a rotating adjustment structure. This design brings many advantages. In actual processing, metal molds have different shapes, such as planes, cylinders, etc. The rotating adjustment structure gives the adsorption body good adaptability, and the angle can be adjusted according to the curvature or inclination of the mold surface.

[0010] Preferably, the moving member comprises two connecting plates, the connecting plates are provided with a moving plate, the connecting plates are further provided with an adapting member, and the adapting member is connected to the mounting shell.

[0011] Preferably, the connecting plate and the adsorption body are connected via a rotatable adaptor, and the movable plate is connected to the sliding assembly, and the adaptor can be a hinge in actual use, so that the adsorption body can be rotated to adjust its position and can adapt to molds of different shapes.

[0012] Preferably, the movable part also includes a movable rod that can be bent and deformed, and rotating blocks are symmetrically provided at both ends of the movable rod. Both rotating blocks are hinged with hinge blocks. The deformable and bendable movable rod will not affect the angle rotation of the two adsorption bodies and adsorption on the cylindrical mold, and the deformable and bendable movable rod also makes it convenient for users to hang the movable rod on the positioning pad.

[0013] Preferably, the two hinge blocks are respectively arranged on two mounting shells, and the hinge blocks are provided with hinge grooves, and the rotating block is located in the hinge grooves and is rotatably connected to the hinge blocks.

[0014] Preferably, the clamping body is provided with a handle for the operator to hold and a positioning pad for positioning the moving rod. The handle and the moving rod are both provided with anti-slip grooves to improve the anti-slip effect. The moving rod can be rotated in the direction of the positioning pad and hung on the positioning pad. The handle is arranged on the connecting shell, and the anti-slip grooves on its surface can increase the friction force, which is convenient for the operator to hold the device for operation. The positioning pad is used to cooperate with the moving rod when the device clamps the plate body downward to prevent the adsorption body from moving downward.

[0015] Preferably, the force sensor is arranged at the clamping device of the clamping body, and is used to detect the weight of the reinforcing plate in real time and transmit a signal to the control module. The control module controls the relay module to switch the suction gear of the electromagnetic component according to a preset weight threshold. The control module triggers the buzzer and the indicator light to issue a warning. The control component includes a switch button 1, a switch button 2 and a switching switch. The switch button 1 and the switch button 2 are arranged on the handle, and the switching switch is arranged on the connecting shell. The buzzer and the indicator light are arranged on the clamping body. When the detected weight does not match the current suction gear and is not switched in time, the control module triggers the buzzer to issue a warning sound, and the indicator light flashes in a specific color (such as red) to remind the operator. The switch button 1 and the switch button 2 are arranged on the handle, which is convenient for the operator to operate with one hand, and are used to control the clamping and loosening of the clamping device and the adsorption and release of the electromagnetic component. The switching switch is arranged on the connecting shell, and is used to manually switch the suction gear when the automatic mode fails or in special scenarios.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The invention significantly improves processing safety and efficiency through the coordinated design of the clamping body and the adsorption body. The groove of the clamping body and multiple clamping devices can quickly clamp the metal plate, replacing manual support, avoiding the problems of high labor intensity and high safety risks caused by the overweight of the plate; the positioning pad cooperates with the moving rod to prevent the adsorption body from sliding down when the device is operated downward, ensuring stability in complex postures; Its adsorption body is symmetrically arranged and deformable. Through the elastic adaptor and the rotation adjustment structure, it can closely fit various mold surfaces such as rectangular and cylindrical shapes. After the electromagnetic component is energized, it generates a strong magnetic force to achieve stable adsorption, solving the problem that traditional equipment is difficult to adapt to complex mold shapes. The device also has intelligent control and humanized design. The force sensor detects the weight of the reinforcement plate in real time, and the control module automatically switches the suction level of the electromagnetic component to avoid energy waste and rapid aging of the equipment. The buzzer and indicator light provide real-time warnings to ensure safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an exploded view of a part of the structure of the present invention; Figure 3 It is a rear side view of the present invention; Figure 4 This is a structural view of the clamping body of the present invention; Figure 5 is an alarm connection flow chart of the present invention; Figure 6 It is a control flow chart of the present invention.

[0019] Explanation of figure numbers: 1. Clamping body; 11. Connecting shell; 12. Groove; 13. Clamping device; 14. Mounting slot; 15. Sliding assembly; 16. Handle; 17. Positioning pad; 2. Adsorption body; 21. Mounting shell; 22. Electromagnetic assembly; 3. Moving part; 31. Connecting plate; 32. Moving plate; 33. Adaptive part; 34. Moving rod; 35. Rotating block; 36. Articulated block; 4. Connecting wire; 5. Force sensor; 6. Control module; 7. Buzzer; 8. Indicator light; 9. Relay module. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings.

[0021] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be used for other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0022] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0023] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity. Example

[0024] See also Figure 1-6 A metal mold processing equipment for concrete prefabricated parts includes a clamping body 1, an adsorption body 2 and a moving part 3. The clamping body 1 is used to clamp a reinforcement plate. The adsorption body 2 is symmetrically provided with two. The adsorption body 2 is used to be adsorbed and fixed to the metal mold, and can be rotated to fit the mold with a certain range of shapes. The moving part 3 is used to connect the clamping body 1 and the adsorption body 2 so that the adsorption body 2 can be close to or away from the metal mold. A force sensor 5, a control module 6 and a relay module 9 are provided in the clamping body 1. A buzzer 7, an indicator light 8 and a switch assembly are provided on the clamping body 1. The connecting shell 11 is the main supporting structure of the clamping body 1. The clamping device 13 can be a pneumatic clamp or a mechanical clamp, etc. By operating the control device, the clamping device 13 can quickly clamp or release the reinforcement plate to achieve a firm clamping of the plate body.

[0025] The clamping body 1 includes a connecting shell 11, a groove 12 is provided on the connecting shell 11, a placement groove is provided in the groove 12, a clamping device 13 is installed in the placement groove, and the clamping device 13 is used to clamp the reinforcing plate. The clamping device 13 can be a pneumatic clamp or a mechanical clamp, etc. By operating the control device, the clamping device 13 can quickly clamp or release the reinforcing plate to achieve a firm clamping of the plate body. The force sensor 5 is set on the clamp when it is set, and can directly detect the weight of the reinforcing plate.

[0026] A mounting groove 14 is also provided on the connecting shell 11, and a sliding component 15 is provided in the mounting groove 14 for cooperating with the moving part 3 to realize the movement of the adsorption body 2. The sliding component 15 is a slide rail structure that can withstand sufficient weight, and provides guidance and support for the movement of the adsorption body 2, ensuring that the adsorption body 2 moves smoothly and the path is accurate.

[0027] The adsorption body 2 includes a mounting shell 21 and an electromagnetic component 22 that can generate magnetic force to be adsorbed on the metal mold. The electromagnetic component 22 is installed on the mounting shell 21. The mounting shell 21 is connected to the movable part 3 through a rotating adjustment structure. The mounting shell 21 of the adsorption body 2 is connected to the movable part 3 through a rotating adjustment structure. This design brings many advantages. In actual processing, the shapes of metal molds are different, including planes, cylindrical surfaces, etc. The rotating adjustment structure gives the adsorption body 2 good adaptability, and the angle can be adjusted according to the curvature or inclination of the mold surface. The clamping device 13 and the electromagnetic component 22 are respectively connected to the switch button 1 and the switch button 2 through the connecting line 4. The connecting line 4 is a spiral wire that can be stretched when in use.

[0028] The movable part 3 includes two connecting plates 31, on which a movable plate 32 is provided, and on which an adaptor 33 is also provided. The adaptor 33 is connected to the mounting shell 21, and the connecting plate 31 is connected to the adsorption body 2 via the adaptor 33 which can rotate and move. The movable plate 32 is connected to the sliding assembly 15, and the adaptor 33 can be a hinge in actual use, so that the adsorption body 2 can be rotated and adjusted to adapt to molds of different shapes.

[0029] The movable part 3 also includes a movable rod 34 that can be bent and deformed. Turning blocks 35 are symmetrically provided at both ends of the movable rod 34. Both turning blocks 35 are hinged with hinge blocks 36. The movable rod 34 that can be deformed and bent will not affect the angle rotation of the two adsorption bodies 2 to be adsorbed on the cylindrical mold, and the movable rod 34 that can be deformed and bent also makes it convenient for the user to hang the movable rod 34 on the positioning pad 17.

[0030] The two hinge blocks 36 are respectively arranged on the two mounting shells 21 . The hinge blocks 36 are provided with hinge grooves. The rotating block 35 is located in the hinge grooves and is rotatably connected to the hinge blocks 36 .

[0031] The clamping body 1 is provided with a handle 16 for the operator to hold and a positioning pad 17 for positioning the moving rod 34. The handle 16 and the moving rod 34 are both provided with anti-slip grooves to improve the anti-slip effect. The moving rod 34 can be rotated toward the positioning pad 17 and hung on the positioning pad 17. The handle 16 is set on the connecting shell 11. The anti-slip grooves on its surface can increase the friction force, which is convenient for the operator to hold the device for operation. The positioning pad 17 is used to cooperate with the moving rod 34 when the device clamps the plate body downward to prevent the adsorption body 2 from moving downward.

[0032] The force sensor 5 is connected to the control module 6: the force sensor 5 is arranged at the clamping device 13 of the clamping body 1, and is used to detect the weight of the reinforcing plate in real time, and transmit the weight signal to the control module 6 through the signal line. The force sensor 5 can adopt a strain gauge force sensor 5 to convert the change of force into an electrical signal output. The control module 6 can choose a single-chip microcomputer, which has multiple analog signal input ports and can receive the signal from the force sensor 5.

[0033] The control module 6 is connected to the relay module 9: the relay module 9 is controlled by the control module 6 and is used to switch the suction level of the electromagnetic component 22. The relay module 9 contains multiple relays, which correspond to different suction levels. The control module 6 sends a control signal to the relay module 9 according to the judgment result. The relay module 9 realizes the switching of the suction level by controlling the current of the electromagnetic component 22. The relay module 9 is connected to the electromagnetic component 22 through a power cord to provide the electromagnetic component 22 with currents of different sizes.

[0034] The control module 6 is connected to the buzzer 7 and the indicator light 8: when the control module 6 determines that the suction level of the current electromagnetic assembly 22 does not match the weight of the reinforcing plate, the buzzer 7 and the indicator light 8 will be triggered to issue a warning. The buzzer 7 and the indicator light 8 are respectively connected to the relay module 9 through their respective signal lines. The control module 6 outputs a corresponding electrical signal to control the module corresponding to the relay module 9, thereby controlling the buzzer 7 to turn on the power and issue a sound alarm, and at the same time making the indicator light 8 flash in a specific manner, such as flashing a red light, to remind the operator to adjust the suction level.

[0035] The control module 6 is connected to the switching switch: the switch assembly includes a switch button 1, a switch button 2 and a switching switch. The switch button 1 and the switch button 2 are arranged on the handle to facilitate the operator to operate with one hand. The switch button 1 is used to control the clamping and releasing action of the clamping device 13, and the switch button 2 is used to control the power on and off of the electromagnetic assembly 22. The switching switch is arranged on the connecting shell 11 and is used to manually switch the suction gear of the electromagnetic assembly 22. The signal of the switch assembly is transmitted to the control module 6 through the line, and the control module 6 performs corresponding operations according to the received signal.

[0036] The power supply system of the whole device includes a low-voltage power supply for powering the control module 6, the force sensor 5, the buzzer 7, the indicator light 8, etc., and a high-voltage power supply for powering the electromagnetic component 22. The low-voltage power supply can adopt a DC 12V power supply, and the high-voltage power supply can adopt a DC 24V power supply. The control module 6, the force sensor 5, the buzzer 7 and the indicator light 8 are powered by the low-voltage power supply, and the electromagnetic component 22 is powered by the high-voltage power supply. Under the control of the control module 6, the relay module 9 controls the on-off of the circuit between the high-voltage power supply and the electromagnetic component 22 to control the suction of the electromagnetic component 22. When the suction gear is manually switched, The operator operates the switching switch, and the control module 6 controls the relay module 9 to operate after receiving the signal, thereby realizing the switching of the suction gear of the electromagnetic component 22. Switching of different current gears can effectively extend the service life of the equipment. For lighter reinforcement plates, the low current state is sufficient to provide stable adsorption and avoid energy waste caused by high current; for heavier reinforcement plates, the strong suction force generated by high current can prevent them from falling during welding, and can avoid energy waste caused by continuous use of high current, and also avoid high current causing the electromagnetic component 22 to be in a high-load working state for a long time, accelerating equipment aging and damage.

[0037] When in use, the reinforcing plate is placed in the groove 12 on the clamping body 1 and between the clamping claws on the clamping device 13. The clamping device 13 is started by controlling the switch 1, and the clamping claws on the clamping device 13 are closed to clamp the reinforcing plate. Then the operator holds the handle 16 to lift the clamped reinforcing plate. When lifting, the force sensor 5 can detect the weight of the reinforcing plate and transmit the weight signal to the control module 6. After lifting the reinforcing plate, the reinforcing plate is brought close to the metal mold so that the welded side of the reinforcing plate contacts the metal mold, and then the moving rod 34 is rotated away from the positioning pad 17 so that the moving rod 34 moves away from the positioning pad 17. The positioning pad 17 is disengaged, and the moving rod 34 is pushed toward the metal mold, so that the electromagnetic component 22 on the adsorption body 2 is close to the metal mold, and then the adsorption switch is turned on, and the electromagnetic component 22 is energized to generate magnetic force to be adsorbed on the mold. During adsorption, the electromagnetic component 22 can be rotated by the adaptor 33 to make the adsorption body 2 adapt to the shape of the mold. After the adsorption body 2 is firmly adsorbed on the mold, the worker can perform welding operation between the metal plate and the mold. After welding is completed, the power supply of the electromagnetic component 22 is disconnected to release the adsorption, and the clamping device 13 is operated to release the metal plate, and the device is removed from the mold; When the equipment is in use, according to the weight of the reinforcement plate, the operator manually selects the suction level of the electromagnetic component 22 by connecting the switching switch on the shell 11. After selecting the level, the switch button 2 on the handle is pressed, and the electromagnetic component 22 is energized to generate suction to fix the metal mold. When the operator lifts the reinforcement plate, the force sensor 5 detects the weight of the reinforcement plate. The controller compares it with the preset weight threshold to determine whether the current plate weight corresponds to the selected suction level. If not, the control module 6 triggers the buzzer 7 to sound an alarm and controls the indicator light 8 to flash, reminding the operator to adjust the suction level. The operator adjusts the suction level by switching the switch according to the prompt to ensure the stability of the reinforcement plate during welding.

[0038] When the device is directed downward to clamp the reinforcing plate, or the reinforcing plate is fixed downward on the metal mold, the moving rod 34 can be first rotated toward the positioning pad 17 and hung on the positioning pad 17 to prevent the adsorption body 2 from moving downward.

[0039] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A metal mold processing equipment for concrete precast parts, characterized in that: It comprises a clamping body (1) used for clamping the reinforcing plate; An adsorption body (2), two of which are symmetrically provided, the adsorption body (2) being used to be adsorbed and fixed to a metal mold, and being able to rotate to fit a mold with a certain range of shapes; A moving part (3) connecting the clamping body (1) and the adsorption body (2) so that the adsorption body (2) can be moved closer to or farther away from the metal mold; The clamping body (1) is provided with a force sensor (5), a control module (6) and a relay module (9), and the clamping body (1) is provided with a buzzer (7), an indicator light (8) and a switch assembly.

2. The metal mold processing equipment for precast concrete parts according to claim 1, characterized in that: The clamping body (1) comprises a connecting shell (11), the connecting shell (11) is provided with a groove (12), a placement groove is provided in the groove (12), a clamping device (13) is installed in the placement groove, and the clamping device (13) is used to clamp the reinforcing plate.

3. The metal mold processing equipment for precast concrete parts according to claim 2 is characterized in that: The connecting shell (11) is also provided with a mounting groove (14), and a sliding component (15) is provided in the mounting groove (14) for cooperating with the moving part (3) to realize the movement of the adsorption body (2).

4. The metal mold processing equipment for precast concrete parts according to claim 3 is characterized in that: The adsorption body (2) comprises a mounting shell (21) and an electromagnetic component (22) capable of generating magnetic force to be adsorbed on a metal mold, wherein the electromagnetic component (22) is mounted on the mounting shell (21), and the mounting shell (21) is connected to the moving part (3) via a rotation adjustment structure.

5. The metal mold processing equipment for precast concrete parts according to claim 4, characterized in that: The moving member (3) comprises two connecting plates (31), a moving plate (32) is provided on the connecting plates (31), and an adapting member (33) is also provided on the connecting plates (31), and the adapting member (33) is connected to the mounting housing (21).

6. The metal mold processing equipment for precast concrete parts according to claim 5, characterized in that: The connecting plate (31) is connected to the adsorption body (2) via a rotatable adaptor (33), and the movable plate (32) is connected to the sliding assembly (15).

7. The metal mold processing equipment for precast concrete parts according to claim 6, characterized in that: The moving member (3) further comprises a moving rod (34) capable of bending and deforming, and rotating blocks (35) are symmetrically provided at both ends of the moving rod (34), and hinge blocks (36) are hingedly connected to the two rotating blocks (35).

8. The metal mold processing equipment for precast concrete parts according to claim 7, characterized in that: The two hinge blocks (36) are respectively arranged on two mounting housings (21); a hinge groove is provided on the hinge block (36); the rotating block (35) is located in the hinge groove and is rotatably connected to the hinge block (36).

9. The metal mold processing equipment for precast concrete parts according to claim 8, characterized in that: The clamping body (1) is provided with a handle (16) for easy gripping by an operator and a positioning pad (17) for positioning the moving rod (34); both the handle (16) and the moving rod (34) are provided with anti-skid patterns for improving the anti-skid effect; the moving rod (34) can be rotated in the direction of the positioning pad (17) to be hung on the positioning pad (17).

10. The metal mold processing equipment for precast concrete parts according to claim 9, characterized in that: The force sensor (5) is arranged at the clamping device (13) of the clamping body (1) and is used to detect the weight of the reinforcing plate in real time and transmit a signal to the control module (6). The control module (6) controls the relay module (9) to switch the suction gear of the electromagnetic component (22) according to a preset weight threshold. The control module (6) triggers the buzzer (7) and the indicator light (8) to issue a warning. The control component comprises a switch button 1, a switch button 2 and a switching switch. The switch button 1 and the switch button 2 are arranged on the handle, and the switching switch is arranged on the connecting shell (11).

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