CN210664708U - High-precision quantitative packaging electronic scale - Google Patents

Abstract

The utility model discloses a high accuracy ration packing electronic scale, including base and accuse stream unit, the base: the upper surface at base left side middle part is fixed with two fixed columns, and the upper surface of fixed column is fixed with first crossbeam, and the inboard at fixed column middle part is fixed with the second crossbeam, and the upper surface at first crossbeam middle part is fixed with the feeder hopper, and the bottom surface at first crossbeam middle part is fixed with the pipeline, and in the upside that the top of pipeline passed first crossbeam was connected to the feeder hopper, accuse flowed the unit: the flow control unit comprises a first fixing block, a servo motor, a first rotating shaft and a turning plate, the first rotating shaft is rotatably connected inside the pipeline, the turning plate is fixed to the front side and the rear side of the first rotating shaft and rotatably connected to the inner side of the pipeline through the first rotating shaft, the first fixing block is fixed to the right side of the pipeline, an output shaft of the servo motor penetrates through the inner side of the pipeline and is fixedly connected to the right end of the first rotating shaft, and the high-precision quantitative packaging electronic scale is high in measurement precision, low in labor intensity and high in production efficiency.

Description

High-precision quantitative packaging electronic scale

Technical Field

The utility model relates to an electronic weighing technical field specifically is a high accuracy ration packing electronic scale.

Background

With the continuous improvement of the automation development level, the automatic control technology is more and more applied to quantitative packaging and is widely applied to various industries such as grains, chemical engineering and the like, so the requirement on the standard metering precision level is higher and higher.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a high accuracy ration packing electronic scale, measurement accuracy is high, low in labor strength, production efficiency are high, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a high-precision quantitative packaging electronic scale comprises a base and a flow control unit;

base: two fixed columns are fixed on the upper surface of the middle part of the left side of the base, first cross beams are fixed on the upper surfaces of the fixed columns, second cross beams are fixed on the inner sides of the middle parts of the fixed columns, a feed hopper is fixed on the upper surface of the middle part of the first cross beam, a pipeline is fixed on the bottom surface of the middle part of the first cross beam, and the top end of the pipeline penetrates through the upper side of the first cross beam and is connected into the feed hopper;

a flow control unit: the flow control unit comprises a first fixing block, a servo motor, a first rotating shaft and turning plates, the first rotating shaft is rotatably connected inside the pipeline, the turning plates are fixed on the front side and the rear side of the first rotating shaft and are rotatably connected to the inner side of the pipeline through the first rotating shaft, the first fixing block is fixed on the right side of the pipeline, the servo motor is fixed on the upper surface of the first fixing block, and an output shaft of the servo motor penetrates through the inner side of the pipeline and is fixedly connected to the right end of the first rotating shaft;

the servo motor drives the first rotating shaft to rotate, so that the turning plate is driven, the speed of the material liquid descending is controlled by controlling the rotating angle of the turning plate, the valve is more accurate than a manual control valve, and the time is saved.

The servo motor is characterized by further comprising a single chip microcomputer, the single chip microcomputer is fixed on the upper surface of the left side of the base, the input end of the single chip microcomputer is electrically connected with the output end of an external power supply, the output end of the single chip microcomputer is electrically connected with the input end of the servo motor, and the single chip microcomputer controls the servo motor to be switched on and switched off.

Further, still include the weighing unit, the weighing unit includes feed cylinder, weighing module, control button and display screen, the last fixed surface at second crossbeam middle part has the weighing module, the last fixed surface of weighing module has the feed cylinder, and the feed cylinder corresponds the setting with the pipeline, the front side of weighing module is equipped with display screen and control button respectively, the output of singlechip is connected to the input electricity of control button and display screen, sets for predetermined feed liquid volume through control button, when feed liquid in the feeder hopper passes through in the pipeline gets into the feed cylinder, shows the feed liquid volume that arrives in the feed cylinder through the display screen, and feed liquid volume in the feed cylinder reaches the predetermined value, controls through control servo motor and turns over the board and close, and degree of automation is high.

The material feeding device further comprises a first guide pipe, a valve, a flow control valve, a second fixed block, a second guide pipe, a first container, a third guide pipe, a second container and a material discharging pipe, wherein the second fixed block is fixed on the upper surface of the middle part of the right side of the base, the flow control valve is fixed on the front side of the second fixed block, the first guide pipe is fixed at the bottom of the material cylinder, the other end of the first guide pipe penetrates through the right side of the fixed column and is connected to the inner side of the bottom of the flow control valve, the valve is arranged on the upper side of the first guide pipe and is positioned below the first cross beam, the inner part of the left side of the flow control valve is connected into the first container through the second guide pipe, the inner part of the right side of the flow control valve is connected into the second container through the third guide pipe, the material discharging pipe is fixed on the upper side of the flow control valve, the valve is opened, feed liquid in the flow control valve flows into the first container and the second container through the second guide pipe and the third guide pipe respectively.

The material flow control device further comprises a second rotating shaft, a rotating plate, a rotating handle and limiting telescopic columns, wherein the middle part in the flow control valve is rotatably connected with the second rotating shaft, the rotating plate is fixed on the side surface of the second rotating shaft, the peripheral side of the rotating plate is larger than the inner diameters of the first guide pipe, the second guide pipe and the third guide pipe, the rear end of the second rotating shaft penetrates through the rear side of the second fixed block and is fixedly connected with the rotating handle, the rear side of the second fixed block is fixedly provided with the two limiting telescopic columns, the limiting telescopic columns are positioned at the bottom side of the rotating handle, the rotating handle is rotated, so that the second rotating shaft and the rotating plate rotate together, when the right end of the rotating handle rotates to a position between the third guide pipe and the discharge pipe, material liquid in the first container flows out through the discharge pipe, meanwhile, material liquid in the material cylinder flows into the flow control valve through the first guide pipe, and material liquid in the flow control valve flows, when the left end of rotation handle rotated to between second pipe and the discharging pipe, the feed liquid in the second container flowed through the discharging pipe, and feed liquid in the feed cylinder flowed into the flow control valve through first pipe simultaneously in, feed liquid in the flow control valve flowed into first container through the second pipe, rotated the handle through the control, made the feed liquid form different flow directions, easy operation, production efficiency height.

The material containing barrel is arranged on the surface of the sliding block, the first fixing plate is fixed on the upper surface of the front side of the base, the second fixing plate is fixed on the front side of the second fixing block, the sliding rail is fixed on the upper surface of the base and is positioned on the inner sides of the first fixing plate and the second fixing plate, the sliding block is connected in a sliding way on the side surface of the sliding rail, the limiting rods are fixed on two sides inside the first fixing plate and the second fixing plate, the fixing rods are fixed on the left side and the right side of the sliding block, the left side and the right side of each fixing rod are connected to the side surface of the limiting rod in a sliding way, the electric telescopic rod is fixed on the rear side of the first fixing plate, the other end of the electric telescopic rod is fixed on the front side of the sliding block, the input end of the electric telescopic rod is electrically connected with the output end of the single, the extension through electric telescopic handle has driven the slider rearward movement, moves the bottom of discharging pipe until containing the feed cylinder, when the material liquid of dress in containing the feed cylinder, through electric telescopic handle shrink, makes the slider move forward, moves original position until the slider, and this kind of mode is convenient for artifical getting of containing the feed cylinder and is put, and intensity of labour is lower.

Compared with the prior art, the beneficial effects of the utility model are that: this high accuracy ration packing electronic scale has following benefit:

1. servo motor drives first axis of rotation and rotates, thereby the board is turned over in the drive, turn over board pivoted angle through the control and control the speed that the feed liquid descends, it is more accurate than manual control valve, save time, set for predetermined feed liquid volume through control button, when feed liquid in the feeder hopper passes through in the pipeline gets into the feed cylinder, show the feed liquid volume that reachs in the feed cylinder through the display screen, feed liquid volume in the feed cylinder reaches the predetermined value, control through control servo motor and turn over the board and close, degree of automation is high.

2. The rotation handle is rotated, so that the second rotation shaft and the rotation plate rotate together, when the right end of the rotation handle rotates to a position between the third guide pipe and the discharge pipe, material liquid in the first container flows out through the discharge pipe, meanwhile, material liquid in the material cylinder flows into the flow control valve through the first guide pipe, material liquid in the flow control valve flows into the second container through the third guide pipe, when the left end of the rotation handle rotates to a position between the second guide pipe and the discharge pipe, material liquid in the second container flows out through the discharge pipe, meanwhile, material liquid in the material cylinder flows into the flow control valve through the first guide pipe, material liquid in the flow control valve flows into the first container through the second guide pipe, and through controlling the rotation handle, the material liquid forms different flow directions, the operation is simple, and the production efficiency is high.

3. Place the flourishing feed cylinder on the slider surface, driven the slider rearward movement through electric telescopic handle's extension, until the bottom that the flourishing feed cylinder removed the discharging pipe, when the feed liquid was adorned in the flourishing feed cylinder, through electric telescopic handle shrink, made the slider move forward, moved original position until the slider, this kind of mode was convenient for artifical getting to the flourishing feed cylinder put, intensity of labour is lower.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the present invention;

fig. 3 is a schematic rear view of the present invention;

fig. 4 is a schematic structural view of the flow control unit 4 of the present invention;

fig. 5 is a schematic view of the internal structure of the flow control valve 11 of the present invention.

In the figure: the device comprises a base 1, a singlechip 2, a fixed column 3, a flow control unit 4, a first fixed block 41, a servo motor 42, a first rotating shaft 43, a turnover plate 44, a weighing unit 5, a charging barrel 51, a weighing module 52, a control button 53, a display screen 54, a first beam 6, a feeding hopper 7, a second beam 8, a first guide pipe 9, a valve 10, a flow control valve 11, a second fixed block 12, a pipeline 13, a second guide pipe 14, a first container 15, a third guide pipe 16, a second container 17, a second rotating shaft 18, a rotating plate 19, a rotating handle 20, a limiting telescopic column 21, a first fixed plate 22, a second fixed plate 23, a sliding rail 24, a sliding block 25, a limiting rod 26, a fixed rod 27, a discharging pipe 28 and an electric telescopic rod 29.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a high-precision quantitative packaging electronic scale comprises a base 1, a flow control unit 4 and a weighing unit 5;

base 1: the upper surface of the middle part of the left side of the base 1 is fixed with two fixed columns 3, the upper surface of the fixed columns 3 is fixed with a first cross beam 6, the inner side of the middle part of the fixed columns 3 is fixed with a second cross beam 8, the upper surface of the middle part of the first cross beam 6 is fixed with a feed hopper 7, the bottom surface of the middle part of the first cross beam 6 is fixed with a pipeline 13, the top end of the pipeline 13 passes through the upper side of the first cross beam 6 and is connected into the feed hopper 7, the device also comprises a first fixed plate 22, a second fixed plate 23, a slide rail 24, a slide block 25, a limiting rod 26, a fixed rod 27 and an electric telescopic rod 29, the upper surface of the front side of the base 1 is fixed with the first fixed plate 22, the front side of the second fixed plate 12 is fixed with the second fixed plate 23, the upper surface of the base 1 is fixed with a slide rail 24, the slide rail 24 is positioned at the inner sides of the first fixed plate 22 and, the left side and the right side of the sliding block 25 are fixed with fixing rods 27, the left side and the right side of each fixing rod 27 are connected to the side face of the limiting rod 26 in a sliding mode, an electric telescopic rod 29 is fixed to the rear side of the first fixing plate 22, the other end of the electric telescopic rod 29 is fixed to the front side of the sliding block 25, the input end of the electric telescopic rod 29 is electrically connected with the output end of the single chip microcomputer 2, the material containing barrel is placed on the surface of the sliding block 25, the sliding block 25 is driven to move backwards through the extension of the electric telescopic rod 29 until the material containing barrel moves to the bottom of the material discharging pipe 28, when the material containing barrel is filled with material liquid, the sliding block 25 moves forwards through the contraction of the electric telescopic rod 29 until the sliding block 25 moves;

and a flow control unit 4: the flow control unit 4 comprises a first fixed block 41, a servo motor 42, a first rotating shaft 43 and a turning plate 44, the first rotating shaft 43 is rotatably connected inside the pipeline 13, the turning plate 44 is fixed on the front side and the rear side of the first rotating shaft 43, the turning plate 44 is rotatably connected to the inner side of the pipeline 13 through the first rotating shaft, the first fixed block 41 is fixed on the right side of the pipeline 13, the servo motor 42 is fixed on the upper surface of the first fixed block 41, an output shaft of the servo motor 42 penetrates through the inner side of the pipeline 13 and is fixedly connected to the right end of the first rotating shaft 43, the servo motor 42 drives the first rotating shaft 43 to rotate, so that the turning plate 44 is driven, the material liquid descending speed is controlled by controlling the rotating angle of the turning plate 44, the valve is more;

the weighing unit 5 comprises a material barrel 51, a weighing module 52, a control button 53 and a display screen 54, wherein the weighing module 52 is fixed on the upper surface of the middle part of the second cross beam 8, the material barrel 51 is fixed on the upper surface of the weighing module 52, the material barrel 51 corresponds to the pipeline 13, the display screen 54 and the control button 53 are respectively arranged on the front side of the weighing module 52, the input ends of the control button 53 and the display screen 54 are electrically connected with the output end of the single chip microcomputer 2, the preset material liquid amount is set through the control button 53, when the material liquid in the feed hopper 7 enters the material barrel 51 through the pipeline 13, the material liquid amount reaching the material barrel 51 is displayed through the display screen 54, when the material liquid amount in the material barrel 51 reaches the preset value, the turning plate 44 is controlled to be closed through controlling the servo motor 42, the degree of automation is high, and the weighing unit 5 further comprises a first guide pipe 9, a valve 10, a flow control, A first container 15, a third guide pipe 16, a second container 17 and a discharge pipe 28, wherein a second fixed block 12 is fixed on the upper surface of the middle part of the right side of the base 1, a flow control valve 11 is fixed on the front side of the second fixed block 12, a first guide pipe 9 is fixed on the bottom of the charging barrel 51, the other end of the first guide pipe 9 passes through the right side of the fixed column 3 and is connected to the inner side of the bottom of the flow control valve 11, a valve 10 is arranged on the upper side of the first guide pipe 9, the valve 10 is positioned below the first beam 6, the inner part of the left side of the flow control valve 11 is connected into the first container 15 through the second guide pipe 14, the inner part of the right side of the flow control valve 11 is connected into the second container 17 through the third guide pipe 16, the discharge pipe 28 is fixed on the upper side of the flow control valve 11, the valve 10 is opened, so that the feed liquid in the charging barrel 51 flows into the flow control valve 11 through the first guide pipe 9 due to the gravity action of the feed liquid, the material flow control device further comprises a second rotating shaft 18, a rotating plate 19, a rotating handle 20 and limiting telescopic columns 21, the middle part in the flow control valve 11 is rotatably connected with the second rotating shaft 18, the rotating plate 19 is fixed on the side surface of the second rotating shaft 18, the peripheral side of the rotating plate 19 is larger than the inner diameters of the first guide pipe 9, the second guide pipe 14 and the third guide pipe 16, the rear end of the second rotating shaft 18 penetrates through the rear side of the second fixed block 12 and is fixedly connected with the rotating handle 20, the rear side of the second fixed block 12 is fixedly provided with the two limiting telescopic columns 21, the limiting telescopic columns 21 are positioned at the bottom side of the rotating handle 20, the rotating handle 20 is rotated, so that the second rotating shaft 18 and the rotating plate 19 rotate together, when the right end of the rotating handle 20 rotates to a position between the third guide pipe 16 and the discharge pipe 28, material liquid in the first container 15 flows out through the discharge pipe 28, meanwhile material liquid in the material cylinder 51 flows into the flow control valve 11 through the first guide pipe 9, material liquid in the flow, when the left end of the rotating handle 20 rotates to a position between the second guide pipe 14 and the discharge pipe 28, the material liquid in the second container 17 flows out through the discharge pipe 28, meanwhile, the material liquid in the charging barrel 51 flows into the flow control valve 11 through the first guide pipe 9, the material liquid in the flow control valve 11 flows into the first container 15 through the second guide pipe 14, and the material liquid forms different flow directions by controlling the rotating handle 20, so that the operation is simple, and the production efficiency is high;

the automatic control device comprises a base, and is characterized by further comprising a single chip microcomputer 2, wherein the single chip microcomputer 2 is fixed on the upper surface of the left side of the base 1, the input end of the single chip microcomputer 2 is electrically connected with the output end of an external power supply, the output end of the single chip microcomputer 2 is electrically connected with the input end of a servo motor 42, and the single chip microcomputer 2 controls the servo motor 42 to be.

When in use: the single chip microcomputer 2 is opened, a material containing barrel is placed on the surface of the sliding block 25, the sliding block 25 is driven to move backwards through the extension of the electric telescopic rod 29 until the material containing barrel moves to the bottom of the material discharging pipe 28, the preset material liquid amount is set through the control button 53, the servo motor 42 drives the first rotating shaft 43 to rotate, so that the turning plate 44 is driven, the speed of the material liquid descending is controlled through controlling the rotating angle of the turning plate 44, when the material liquid in the feed hopper 7 enters the material barrel 51 through the pipeline 13, the material liquid amount reaching the material barrel 51 is displayed through the display screen 54, when the material liquid amount in the material barrel 51 reaches the preset value, the turning plate 44 is controlled to be closed through controlling the servo motor 42, the valve 10 is opened, the material liquid in the material barrel 51 flows into the flow control valve 11 through the first guide pipe 9 under the action of the gravity of the material liquid, the material liquid in the flow control valve 11 flows into the first container 15 and, the rotation handle 20 is rotated so that the second rotation shaft 18 and the rotation plate 19 rotate together, when the right end of the rotation handle 20 is rotated between the third guide pipe 16 and the discharge pipe 28, the material liquid in the first container 15 flows out through the discharge pipe 28, the material liquid in the material cylinder 51 flows into the flow control valve 11 through the first guide pipe 9, the material liquid in the flow control valve 11 flows into the second container 17 through the third guide pipe 16, when the left end of the rotation handle 20 is rotated between the second guide pipe 14 and the discharge pipe 28, the material liquid in the second container 17 flows out through the discharge pipe 28, the material liquid in the material cylinder 51 flows into the flow control valve 11 through the first guide pipe 9, the material liquid in the flow control valve 11 flows into the first container 15 through the second guide pipe 14, the material liquid forms different flow directions by controlling the rotation handle 20, the operation is simple, when the material liquid is filled in the material cylinder, the slide block 25 moves forward by contracting the electric telescopic rod 29, until the slide block 25 moves to the original position, the mode is convenient for manual taking and placing of the material containing barrel, and the labor intensity is lower.

It should be noted that the single chip microcomputer 2 disclosed in this embodiment may be an STC single chip microcomputer, a specific model is STC15W210S, the servo motor 42 and the electric telescopic rod 29 may be freely configured according to an actual application scenario, the servo motor 42 may be a shanghai ben miniature servo motor, a specific model is 40ST-M00330, preferably, the rotation speed is below 3000 rpm, the electric telescopic rod 29 may be a hang glider electric telescopic rod, and the single chip microcomputer 2 controls the servo motor 42 and the electric telescopic rod 29 to operate by a method commonly used in the prior art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a high accuracy ration packing electronic scale which characterized in that: comprises a base (1) and a flow control unit (4);

base (1): the upper surface of the middle part of the left side of the base (1) is fixedly provided with two fixing columns (3), the upper surfaces of the fixing columns (3) are fixedly provided with first cross beams (6), the inner sides of the middle parts of the fixing columns (3) are fixedly provided with second cross beams (8), the upper surface of the middle part of each first cross beam (6) is fixedly provided with a feed hopper (7), the bottom surface of the middle part of each first cross beam (6) is fixedly provided with a pipeline (13), and the top end of each pipeline (13) penetrates through the upper side of each first cross beam (6) and is connected into the feed hopper (7);

flow control unit (4): the flow control unit (4) comprises a first fixing block (41), a servo motor (42), a first rotating shaft (43) and turning plates (44), the first rotating shaft (43) is rotatably connected inside the pipeline (13), the turning plates (44) are fixed on the front side and the rear side of the first rotating shaft (43), the turning plates (44) are rotatably connected to the inner side of the pipeline (13) through the first rotating shaft, the first fixing block (41) is fixed on the right side of the pipeline (13), the servo motor (42) is fixed on the upper surface of the first fixing block (41), and an output shaft of the servo motor (42) penetrates through the inner side of the pipeline (13) and is fixedly connected to the right end of the first rotating shaft (43);

the power supply device is characterized by further comprising a single chip microcomputer (2), the single chip microcomputer (2) is fixed on the upper surface of the left side of the base (1), the input end of the single chip microcomputer (2) is electrically connected with the output end of an external power supply, and the output end of the single chip microcomputer (2) is electrically connected with the input end of the servo motor (42).

2. A high precision quantitative packaging electronic scale according to claim 1, characterized in that: still include weighing unit (5), weighing unit (5) include feed cylinder (51), weighing module (52), control button (53) and display screen (54), the upper surface mounting at second crossbeam (8) middle part has weighing module (52), the upper surface mounting of weighing module (52) has feed cylinder (51), and feed cylinder (51) and pipeline (13) correspond the setting, the front side of weighing module (52) is equipped with display screen (54) and control button (53) respectively, the output of singlechip (2) is connected to the input electricity of control button (53) and display screen (54).

3. A high precision quantitative packaging electronic scale according to claim 2, characterized in that: the device is characterized by further comprising a first guide pipe (9), a valve (10), a flow control valve (11), a second fixing block (12), a second guide pipe (14), a first container (15), a third guide pipe (16), a second container (17) and a discharge pipe (28), wherein the second fixing block (12) is fixed on the upper surface of the middle portion of the right side of the base (1), the flow control valve (11) is fixed on the front side of the second fixing block (12), the first guide pipe (9) is fixed on the bottom of the charging barrel (51), the other end of the first guide pipe (9) penetrates through the right side of the fixing column (3) and is connected to the inner side of the bottom of the flow control valve (11), the valve (10) is arranged on the upper side of the first guide pipe (9), the valve (10) is located below the first cross beam (6), the inside of the left side of the flow control valve (11) is connected into the first container (15) through the second guide pipe (14), and the inside of the right side of the flow control valve (11) is connected into the, and a discharge pipe (28) is fixed on the upper side of the flow control valve (11).

4. A high precision quantitative packaging electronic scale according to claim 3, characterized in that: still include second axis of rotation (18), rotor plate (19), rotation handle (20) and spacing flexible post (21), middle part in accuse stream valve (11) is rotated and is connected with second axis of rotation (18), the side of second axis of rotation (18) is fixed with rotor plate (19), and the week side of rotor plate (19) is greater than the inner diameter of first pipe (9), second pipe (14) and third pipe (16), the rear side fixedly connected with rotation handle (20) of second fixed block (12) is passed to the rear end of second axis of rotation (18), the rear side of second fixed block (12) is fixed with two spacing flexible posts (21), spacing flexible post (21) are located the bottom side of rotating handle (20).

5. A high precision quantitative packaging electronic scale according to claim 3, characterized in that: the electric telescopic rod is characterized by further comprising a first fixing plate (22), a second fixing plate (23), a sliding rail (24), a sliding block (25), a limiting rod (26), a fixing rod (27) and an electric telescopic rod (29), wherein the first fixing plate (22) is fixed on the upper surface of the front side of the base (1), the second fixing plate (23) is fixed on the front side of the second fixing block (12), the sliding rail (24) is fixed on the upper surface of the base (1), the sliding rail (24) is located on the inner sides of the first fixing plate (22) and the second fixing plate (23), the sliding block (25) is connected in a sliding groove in the side face of the sliding rail (24) in a sliding mode, the limiting rod (26) is fixed on the two inner sides of the first fixing plate (22) and the second fixing plate (23), the fixing rod (27) is fixed on the left side face and the right side face of the sliding rod (27), and the, an electric telescopic rod (29) is fixed on the rear side of the first fixing plate (22), the other end of the electric telescopic rod (29) is fixed on the front side of the sliding block (25), and the input end of the electric telescopic rod (29) is electrically connected with the output end of the single chip microcomputer (2).

Images