Scratch-proof packaging device for key injection molding part

Abstract

The invention discloses a scratch-proof packaging device for key injection molding parts, and relates to the technical field of plastic packaging, the scratch-proof packaging device comprises a mounting base, two vertical plates are fixedly mounted at the top end of the mounting base, a mounting frame and a bearing seat are fixedly mounted at the top end of the mounting base, and the bearing seat is fixedly mounted on the right side of the top end of the mounting base; a mounting base is fixedly mounted on the left side of the top end of the mounting base, a storage bin is fixedly mounted at the top end of the mounting base, a supporting column is fixedly mounted at the top end of the mounting base, and a discharging plate is fixedly mounted at the top end of the supporting column. According to the injection molding part conveying device, the material distribution assembly is arranged, injection molding parts in the material storage bin are subjected to material distribution operation, so that the injection molding parts can enter the conveying mechanism in batches to be conveyed, and the situation that the injection molding parts collide in the conveying process due to the fact that the number of the injection molding parts is too large is avoided; and in the injection molding part conveying process, the injection molding parts are protected, and damage caused by direct contact between the injection molding parts and the vertical plates is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of plastic packaging, in particular to an anti-scratch packaging device for a key injection molded part. Background Art

[0002] Injection molded parts refer to various injection molded products produced by injection molding machines, including various packages, parts, etc., which are mainly made of materials such as polyethylene or polypropylene and added with a variety of organic solvents. In the Chinese patent with application number 202122895342.2, "an injection molded parts transfer packaging device is disclosed, including a conveyor belt and a workbench, the workbench is located at the discharge end of the conveyor belt, the discharge end of the conveyor belt is inclined downward, and a receiving trough is provided on one end of the workbench close to the conveyor belt, the receiving trough is located below the discharge end of the conveyor belt, and cylinders are provided on the workbench on the left and right sides of the receiving trough. The two cylinders are arranged oppositely, and the piston rod end of the cylinder is fixedly connected with a pressure plate, and one end of the receiving trough is provided with a discharge port, and the discharge port passes through the end of the workbench. The injection molded parts transfer packaging device provided by the utility model can automatically package injection molded parts, improve work efficiency, and reduce the labor intensity of workers."

[0003] This comparative document only solves the problem of packaging of injection molded parts in the prior art, which is usually done by manually removing the injection molded parts from the conveyor belt and packaging them with plastic film, resulting in low work efficiency. However, the device does not provide a protective mechanism to protect the injection molded parts during the transportation of the injection molded parts, so that the injection molded parts may collide with the conveying mechanism during the transportation process, and a large number of injection molded parts may collide with each other during the transportation process, resulting in damage to the surface of the injection molded parts, affecting the subsequent packaging quality of the injection molded parts. Summary of the invention

[0004] The object of the present invention is to provide a scratch-resistant packaging device for key injection molded parts to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an anti-scratch packaging device for a key injection molded part, comprising a mounting base, two vertical plates are fixedly mounted on the top of the mounting base, and a mounting frame is fixedly mounted on the top of the mounting base;

[0006] A bearing seat, the bearing seat is fixedly mounted on the right side of the top of the mounting base, a mounting seat is fixedly mounted on the left side of the top of the mounting base, a storage bin is fixedly mounted on the top of the mounting seat, a support column is fixedly mounted on the top of the mounting base, and a blanking plate is fixedly mounted on the top of the support column;

[0007] A conveying mechanism, the conveying mechanism is fixedly mounted on the front vertical plate, the conveying mechanism comprises a double-shaft single-phase motor, and the double-shaft single-phase motor is fixedly mounted on the front side of the front vertical plate;

[0008] A material distribution component, the material distribution component is movably arranged in the installation frame, the material distribution component comprises a traction ring, and the traction ring is movably arranged in the installation frame;

[0009] A protection component, the protection component is fixedly mounted on the vertical plate, the protection component comprises a fixing plate, and two fixing plates are respectively fixedly mounted on opposite surfaces of the two vertical plates;

[0010] The packing assembly is fixedly mounted on the top of the bearing seat. The packing assembly comprises a bearing frame, and the bearing frame is fixedly mounted on the top of the bearing seat.

[0011] Preferably, the conveying mechanism further comprises a rotating roller and a conveyor belt, a rotating roller is welded on the output shaft at the rear end of the dual-axis single-phase motor, and the rotating roller is meshingly connected with the conveyor belt.

[0012] Preferably, a belt is movably provided on the output shaft at the front end of the dual-axis single-phase motor, a rotating shaft is movably provided on the end of the belt away from the dual-axis single-phase motor, a bevel gear 1 is installed on the rotating shaft through a flat key, the bevel gear 1 is meshingly connected with the bevel gear 2, and a limiting sleeve is welded at the bottom end of the inner cavity of the installation frame.

[0013] Preferably, the material dividing plate assembly also includes a rotating rod, a connecting rod 1, a connecting rod 2, a supporting plate, a first material dividing plate, a second material dividing plate and a third material dividing plate. A rotating rod is welded on the left side of the bevel gear 2, a connecting rod 1 is movably connected in the limiting sleeve, a traction ring is welded on the top of the connecting rod 1, a connecting rod 2 is welded on the top of the traction ring, a supporting plate is welded on the top of the supporting plate, the first material dividing plate is installed on the top of the supporting plate by screws, the second material dividing plate is installed on the top of the supporting plate by screws, the third material dividing plate is installed on the top of the supporting plate by screws, and the rotating rod is movably arranged in the traction ring.

[0014] Preferably, guide grooves are respectively provided in the middle of the front and rear sides of the inner cavity of the installation frame, limit blocks are respectively welded in the middle of the two sides of the front side of the load-bearing plate, and the limit blocks are slidably connected in the guide grooves, a first feeding plate is welded between the front and rear sides of the inner cavity of the installation frame, a second feeding plate is welded between the front and rear sides of the inner cavity of the installation frame, and a third feeding plate is welded between the front and rear sides of the inner cavity of the installation frame. The bottom end of the inner cavity of the storage bin is provided with a slope one which gradually decreases in height from left to right, and the tops of the first feed plate, the second feed plate, the third feed plate, the first dividing plate, the second dividing plate and the third dividing plate are all provided with a slope two with the same slope as the first slope.

[0015] Preferably, the protective assembly also includes a limiting slot, a return spring rod and a protective plate, the limiting slots are respectively opened on the right sides of the two fixed plates, a number of return spring rods are respectively installed on the opposite surfaces of the two vertical plates by screws, a protective plate is installed on the side of the return spring rod away from the vertical plate by screws, a guide block is welded on the left side of the protective plate, and the guide block is slidably connected in the limiting slot, and the protective plate is made of rubber material.

[0016] Preferably, the packaging assembly also includes an electric telescopic rod, a fixed block and a hook. Two electric telescopic rods are installed on the top of the inner cavity of the supporting frame by screws. The telescopic ends of the two electric telescopic rods are respectively welded with fixed blocks, and hooks are respectively welded on the opposite surfaces of the two fixed blocks. An installation groove is opened on the top of the supporting seat.

[0017] Preferably, two infrared sensors are installed on the top of the support seat by screws, a counter is installed on the left front end of the support seat by screws, and a control switch is installed on the right front end of the support seat by screws, and the dual-axis single-phase motor, electric telescopic rod, infrared sensor and counter are all electrically connected to the external power supply through the control switch.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention is provided with a material dividing component to divide the injection molded parts in the storage bin, so that the injection molded parts can be transported in batches into the conveying mechanism to avoid collision of the injection molded parts during the transportation process due to an excessive number of injection molded parts. The present invention is provided with a protective component to protect the injection molded parts during the transportation process of the injection molded parts, so as to avoid damage caused by direct contact between the injection molded parts and the vertical plate, thereby affecting the quality of the injection molded parts;

[0020] 2. The present invention is provided with an infrared sensor to monitor the number of injection molded parts entering the installation groove, and is used in conjunction with a counter and a control switch. After the number monitored by the infrared sensor reaches a set value, the conveying work is automatically stopped, and the injection molded parts in the installation groove are packaged through a packaging component. The entire work process has a high degree of automation, which reduces the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a first three-dimensional structure of an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of a second three-dimensional structure of an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the material distribution component in the embodiment of the present invention;

[0024] Figure 4 It is a front view schematic diagram of the material distribution component in the embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the protection component in an embodiment of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the packaging component in an embodiment of the present invention.

[0027] In the figure: 1, mounting base; 2, vertical plate; 3, conveying mechanism; 31, double-axis single-phase motor; 32, rotating roller; 33, conveyor belt; 4, belt; 5, mounting frame; 6, material dividing assembly; 61, rotating rod; 62, traction ring; 63, connecting rod 1; 64, connecting rod 2; 65, bearing plate; 66, first material dividing plate; 67, second material dividing plate; 68, third material dividing plate; 7, protection assembly; 71, fixing plate; 72, limiting groove; 73, reset spring rod; 74, protection Plate; 8. Bearing seat; 9. Packing assembly; 91. Bearing frame; 92. Electric telescopic rod; 93. Fixing block; 94. Hook; 10. Mounting seat; 11. Storage bin; 12. Unloading plate; 13. Infrared sensor; 14. Counter; 15. Control switch; 16. Rotating shaft; 17. Bevel gear one; 18. Bevel gear two; 19. Limiting sleeve; 20. First feeding plate; 21. Second feeding plate; 22. Third feeding plate; 23. Guide groove; 24. Mounting groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-6 The present invention provides a technical solution: an anti-scratch packaging device for key injection molded parts, comprising a mounting base 1, two vertical plates 2 are welded on the top of the mounting base 1, and a mounting frame 5 is welded on the top of the mounting base 1;

[0030] A bearing seat 8 is welded to the right side of the top of the mounting base 1, a mounting seat 10 is welded to the left side of the top of the mounting base 1, a storage bin 11 is welded to the top of the mounting seat 10, a support column is welded to the top of the mounting base 1, and a blanking plate 12 is welded to the top of the support column;

[0031] The conveying mechanism 3 is fixedly mounted on the front vertical plate 2. The conveying mechanism 3 includes a double-shaft single-phase motor 31. The double-shaft single-phase motor 31 is mounted on the front side of the front vertical plate 2 by screws.

[0032] A material dividing assembly 6, the material dividing assembly 6 is movably disposed in the mounting frame 5, and the material dividing assembly 6 comprises a traction ring 62, and the traction ring 62 is movably disposed in the mounting frame 5;

[0033] A protection component 7, which is fixedly mounted on the vertical plate 2. The protection component 7 includes a fixing plate 71. Two fixing plates 71 are respectively welded to opposite surfaces of the two vertical plates 2;

[0034] The packing assembly 9 is fixedly mounted on the top of the bearing seat 8 . The packing assembly 9 comprises a bearing frame 91 , and the bearing frame 91 is welded on the top of the bearing seat 8 .

[0035] The conveying mechanism 3 also includes a rotating roller 32 and a conveyor belt 33. The rotating roller 32 is welded on the output shaft at the rear end of the double-shaft single-phase motor 31, and the rotating roller 32 is meshedly connected with the conveyor belt 33. The injection molded parts are conveyed by the provided conveying mechanism 3.

[0036] A belt 4 is movably provided on the output shaft at the front end of the double-shaft single-phase motor 31, and a rotating shaft 16 is movably provided on the end of the belt 4 away from the double-shaft single-phase motor 31. A bevel gear 17 is installed on the rotating shaft 16 through a flat key, and the bevel gear 17 is meshed and connected with a bevel gear 2 18. A limiting sleeve 19 is welded at the bottom end of the inner cavity of the mounting frame 5; the bevel gear 17 is driven to rotate by the belt 4, and then the material distribution component 6 is driven to work through the bevel gear 2 18;

[0037] The material dividing assembly 6 also includes a rotating rod 61, a connecting rod 1 63, a connecting rod 2 64, a bearing plate 65, a first material dividing plate 66, a second material dividing plate 67 and a third material dividing plate 68. The rotating rod 61 is welded on the left side of the bevel gear 2 18, and the connecting rod 1 63 is movably connected in the limiting sleeve 19. A traction ring 62 is welded on the top of the connecting rod 1 63, and a connecting rod 2 64 is welded on the top of the traction ring 62. A bearing plate 65 is welded on the top of the bearing plate 65. The first material dividing plate 66 is installed on the top of the bearing plate 65 by screws, the second material dividing plate 67 is installed on the top of the bearing plate 65 by screws, and the third material dividing plate 68 is installed on the top of the bearing plate 65 by screws. The rotating rod 61 is movably arranged in the traction ring 62; the injection molded parts in the storage bin 11 are divided by the arranged material dividing assembly 6;

[0038] Guide grooves 23 are respectively provided in the middle of the front and rear sides of the inner cavity of the installation frame 5, and limit blocks are respectively welded in the middle of the two sides of the front side of the carrying plate 65, and the limit blocks are slidably connected in the guide grooves 23, a first feeding plate 20 is welded between the front and rear sides of the inner cavity of the installation frame 5, a second feeding plate 21 is welded between the front and rear sides of the inner cavity of the installation frame 5, and a third feeding plate 22 is welded between the front and rear sides of the inner cavity of the installation frame 5. The bottom end of the inner cavity of the storage bin 11 is provided with an inclined plane 1 whose height gradually decreases from left to right, and the tops of the first feeding plate 20, the second feeding plate 21, the third feeding plate 22, the first dividing plate 66, the second dividing plate 67 and the third dividing plate 68 are all provided with an inclined plane 2 with the same inclination as the inclined plane 1; the movement of the carrying plate 65 is limited by the provided limit blocks;

[0039] The protection component 7 also includes a limit slot 72, a return spring rod 73 and a protection plate 74. The right sides of the two fixing plates 71 are respectively provided with a limit slot 72. A plurality of return spring rods 73 are respectively installed on the opposite surfaces of the two vertical plates 2 by screws. A protection plate 74 is installed on the side of the return spring rod 73 away from the vertical plate 2 by screws. A guide block is welded on the left side of the protection plate 74, and the guide block is slidably connected in the limit slot 72. The protection plate 74 is made of rubber material. The protection component 7 is provided to protect the injection molded parts during the conveying process.

[0040] The packaging assembly 9 also includes an electric telescopic rod 92, a fixing block 93 and a hook 94. Two electric telescopic rods 92 are installed on the top of the inner cavity of the carrier frame 91 by screws. The telescopic ends of the two electric telescopic rods 92 are respectively welded with fixing blocks 93. The opposite surfaces of the two fixing blocks 93 are respectively welded with hooks 94. The top of the carrier seat 8 is provided with a mounting groove 24. The injection molded parts are packaged by the packaging assembly 9.

[0041] Two infrared sensors 13 are installed on the top of the supporting seat 8 by screws, a counter 14 is installed on the left front end of the supporting seat 8 by screws, and a control switch 15 is installed on the right front end of the supporting seat 8 by screws. The dual-axis single-phase motor 31, the electric telescopic rod 92, the infrared sensor 13 and the counter 14 are all electrically connected to the external power supply through the control switch 15; the switches of the dual-axis single-phase motor 31, the electric telescopic rod 92, the infrared sensor 13 and the counter 14 are controlled by the set control switch 15.

[0042] Working principle: the injection molded parts are placed in the storage bin 11, and a packing bag is hung on the hook 94, and the packing bag is located in the installation slot 24. Since the bottom end of the inner cavity of the storage bin 11 is provided with an inclined surface 1, the injection molded parts fall onto the first material dividing plate 66 one by one, and the double-axis single-phase motor 31 is started by the control switch 15. The double-axis single-phase motor 31 drives the rotating shaft 16 to rotate through the belt 4. The rotation of the rotating shaft 16 drives the bevel gear 1 17 to drive, and the rotation of the bevel gear 17 drives the bevel gear 2 18 to rotate, thereby driving the rotating rod 61 to rotate in the traction The guide ring 62 makes a linear reciprocating motion forward and backward, and drives the traction ring 62 to make a linear reciprocating motion up and down. The traction ring 62 drives the bearing plate 65 to move in the same direction through the connecting rod 2 64, and then drives the first dividing plate 66, the second dividing plate 67 and the third dividing plate 68 to move in the same direction, so that the injection molded parts on the first dividing plate 66 gradually fall onto the first feeding plate 20, the injection molded parts gradually fall onto the second feeding plate 21 through the second dividing plate 67, and the injection molded parts gradually fall onto the third dividing plate 68. The feeding plate 22 is moved onto the feeding plate 22, and then falls onto the conveyor belt 33 to start conveying, thereby realizing the material distribution operation of the injection molded parts. The rotating roller 32 is driven to rotate by the double-axis single-phase motor 31, and then the conveyor belt 33 is driven to work to convey the injection molded parts. When the injection molded parts are offset during the conveying process and contact the protective plate 74, the reset spring rod 73 is compressed, thereby preventing the injection molded parts from directly contacting the vertical plate 2 and causing damage. The injection molded parts fall into the packing bag in the installation groove 24 through the unloading plate 12. When the injection molded parts pass through the infrared sensor 13, the infrared sensor 13 sends a signal to the control switch 15 to increase the value of the counter 14 by 1. When the number of injection molded parts passing through the infrared sensor 13 reaches the set value of the counter 14, the control switch 15 controls the double-axis single-phase motor 31 to turn off, and starts the electric telescopic rod 92. The electric telescopic rod 92 drives the fixed block 93 to move upward, thereby causing the packing bag to detach from the installation groove 24, and the staff removes the packing bag from the hook 94 and packages it.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A scratch-resistant packaging device for a key injection molded part, comprising a mounting base (1), characterized in that: Two vertical plates (2) are fixedly mounted on the top of the mounting base (1), and a mounting frame (5) is fixedly mounted on the top of the mounting base (1); A bearing seat (8), the bearing seat (8) is fixedly mounted on the right side of the top of the mounting base (1), a mounting seat (10) is fixedly mounted on the left side of the top of the mounting base (1), a storage bin (11) is fixedly mounted on the top of the mounting seat (10), a support column is fixedly mounted on the top of the mounting base (1), and a blanking plate (12) is fixedly mounted on the top of the support column; A conveying mechanism (3), the conveying mechanism (3) is fixedly mounted on the front vertical plate (2), the conveying mechanism (3) comprises a double-shaft single-phase motor (31), and the double-shaft single-phase motor (31) is fixedly mounted on the front side of the front vertical plate (2); A material distribution component (6), the material distribution component (6) is movably arranged in the installation frame (5), the material distribution component (6) comprises a traction ring (62), and the traction ring (62) is movably arranged in the installation frame (5); A protection component (7), the protection component (7) being fixedly mounted on the vertical plate (2), the protection component (7) comprising a fixing plate (71), and two fixing plates (71) being fixedly mounted on opposite surfaces of the two vertical plates (2) respectively; A packing assembly (9), wherein the packing assembly (9) is fixedly mounted on the top of a bearing seat (8), and the packing assembly (9) comprises a bearing frame (91), wherein the bearing frame (91) is fixedly mounted on the top of the bearing seat (8).

2. The anti-scratch packaging device for key injection molded parts according to claim 1, characterized in that: The conveying mechanism (3) further comprises a rotating roller (32) and a conveyor belt (33); the rotating roller (32) is welded on the output shaft at the rear end of the dual-shaft single-phase motor (31); and the rotating roller (32) is meshingly connected with the conveyor belt (33).

3. The anti-scratch packaging device for key injection molded parts according to claim 1, characterized in that: A belt (4) is movably arranged on the output shaft at the front end of the dual-axis single-phase motor (31); a rotating shaft (16) is movably arranged on one end of the belt (4) away from the dual-axis single-phase motor (31); a bevel gear 1 (17) is mounted on the rotating shaft (16) via a flat key; the bevel gear 1 (17) is meshingly connected with a bevel gear 2 (18); and a limiting sleeve (19) is welded to the bottom end of the inner cavity of the mounting frame (5).

4. The anti-scratch packaging device for key injection molded parts according to claim 3, characterized in that: The material dividing assembly (6) further comprises a rotating rod (61), a connecting rod 1 (63), a connecting rod 2 (64), a bearing plate (65), a first material dividing plate (66), a second material dividing plate (67) and a third material dividing plate (68); the rotating rod (61) is welded on the left side of the bevel gear 2 (18); the connecting rod 1 (63) is movably connected in the limiting sleeve (19); a traction ring (62) is welded on the top of the connecting rod 1 (63); a connecting rod 2 (64) is welded on the top of the traction ring (62); a bearing plate (65) is welded on the top of the bearing plate (65); the first material dividing plate (66) is installed on the top of the bearing plate (65) by screws; the second material dividing plate (67) is installed on the top of the bearing plate (65) by screws; the third material dividing plate (68) is installed on the top of the bearing plate (65) by screws; and the rotating rod (61) is movably arranged in the traction ring (62).

5. The anti-scratch packaging device for key injection molded parts according to claim 4, characterized in that: The middle parts of the front and rear sides of the inner cavity of the installation frame (5) are respectively provided with guide grooves (23); the middle parts of the front and rear sides of the carrying plate (65) are respectively welded with limit blocks, and the limit blocks are slidably connected in the guide grooves (23); a first feeding plate (20) is welded between the front and rear sides of the inner cavity of the installation frame (5); a second feeding plate (21) is welded between the front and rear sides of the inner cavity of the installation frame (5); a third feeding plate (22) is welded between the front and rear sides of the inner cavity of the installation frame (5); a slope 1 whose height gradually decreases from left to right is provided at the bottom end of the inner cavity of the storage bin (11); and a slope 2 with the same slope as the first is provided at the top of the first feeding plate (20), the second feeding plate (21), the third feeding plate (22), the first dividing plate (66), the second dividing plate (67) and the third dividing plate (68).

6. The anti-scratch packaging device for key injection molded parts according to claim 1, characterized in that: The protection assembly (7) further comprises a limiting groove (72), a return spring rod (73) and a protection plate (74); the right sides of the two fixing plates (71) are respectively provided with a limiting groove (72); the opposite surfaces of the two vertical plates (2) are respectively provided with a plurality of return spring rods (73) by screws; the side of the return spring rod (73) away from the vertical plate (2) is provided with a protection plate (74) by screws; a guide block is welded on the left side of the protection plate (74), and the guide block is slidably connected in the limiting groove (72); the protection plate (74) is made of rubber material.

7. The anti-scratch packaging device for key injection molded parts according to claim 1, characterized in that: The packaging assembly (9) further comprises an electric telescopic rod (92), a fixing block (93) and a hook (94); two electric telescopic rods (92) are mounted on the top of the inner cavity of the bearing frame (91) by means of screws; the telescopic ends of the two electric telescopic rods (92) are respectively welded with fixing blocks (93); hooks (94) are respectively welded on the opposite surfaces of the two fixing blocks (93); and a mounting groove (24) is provided on the top of the bearing seat (8).

8. The anti-scratch packaging device for key injection molded parts according to claim 7, characterized in that: Two infrared sensors (13) are installed on the top of the bearing seat (8) by screws, a counter (14) is installed on the left front end of the bearing seat (8) by screws, and a control switch (15) is installed on the right front end of the bearing seat (8) by screws, and the dual-axis single-phase motor (31), the electric telescopic rod (92), the infrared sensor (13) and the counter (14) are all electrically connected to an external power supply via the control switch (15).

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