Upper limb automatic wearable gait weight reduction training mechanism

Abstract

The invention relates to gait training equipment, in particular to an upper limb automatic wearable gait weight reduction training mechanism which comprises a supporting unit, a wheelchair fixing mechanism and a wearable device. Supporting vertical rods are fixedly arranged at the four corners of the upper end of each supporting unit, and a supporting transverse rod is fixedly arranged between the upper ends of every two left-right adjacent supporting vertical rods. Sliding grooves are formed in the sides, close to each other, of the two supporting cross rods; when the wearable device moves, the position of a wheelchair under a patient body can be automatically fixed, so that the safety problem that the patient falls down when getting up or sitting down is avoided; meanwhile, the upper limbs of the patient are pulled up through the auxiliary traction rope, and then the traction clothes are automatically worn on the body of the patient, so that the number of nursing personnel is reduced, and the operation requirements are met.

Description

Technical Field

[0001] The present invention relates to a gait training device, and particularly to an upper limb automatic wearable gait weight-bearing training mechanism. Background Art

[0002] The number of patients with leg injuries is increasing continuously, and rehabilitation has become an important task after their treatment. At present, rehabilitation training mainly relies on two methods: one is manual traction, that is, others assist the patient to perform leg exercises. Although this method helps to guide the patient, the rehabilitation process is relatively slow; the other is mechanical traction, which suspends the patient through a device to reduce the leg burden and promote the patient's independent exercise.

[0003] Existing weight-bearing assistance equipment, such as traction clothes, is designed to assist gait training by reducing the patient's weight. However, wearing this equipment usually requires the cooperation of multiple caregivers, which not only consumes a large amount of manpower, but also due to individual differences, the traction clothes may not fully adapt to the patient's body, resulting in unstable center of gravity during the training process and affecting the rehabilitation effect. In addition, the traction clothes are usually connected only by two ropes. Once the ropes break or other accidents occur, the safety of the patient cannot be guaranteed. Summary of the Invention

[0004] Therefore, the present invention is made in view of the above problems. The purpose of the present invention is to first fix the position of the wheelchair, lower the traction clothes behind the patient, and then wear the traction clothes on the patient, so as to automatically wear the traction clothes on the patient while ensuring the patient's own safety, thereby reducing the consumption of manpower. The present invention realizes the above purpose through the following technical solutions:

[0005] An upper limb automatic wearable gait weight-bearing training mechanism, including a support unit, a wheelchair fixing mechanism, and a wearing device; support vertical rods are fixedly arranged at the four corners of the upper end of the support unit, and support cross rods are fixedly arranged between the upper ends of every two adjacent left and right support vertical rods; sliding grooves are arranged on the mutually approaching sides of the two support cross rods; a first support plate is fixedly arranged at the right end between the two support cross rods; a first driving motor is fixedly arranged on the right side of the first support plate; a moving control rod is rotatably installed at the center of the left end of the first support plate, and the right end of the moving control rod is fixedly connected to the output end of the first driving motor; a thread is arranged on the outer side of the moving control rod; a first bevel gear is coaxially fixedly arranged at the left end of the moving control rod; both sides of the first bevel gear are meshed with the wheelchair fixing mechanism; a wearing device is threadedly driven below the moving control rod; both sides of the wearing device are slidably connected to the sliding grooves.

[0006] Advantages of the Present Invention

[0007] 1. When the wearable device is moving, the present invention can automatically fix the position of the wheelchair under the patient, ensuring the safety of the patient during the process of standing up or sitting down and avoiding the risk of falling.

[0008] 2. The present invention first uses an auxiliary traction rope to lift the upper limb of the patient, and then automatically wears the traction garment on the patient, which not only reduces the dependence on nursing staff but also simplifies the operation process.

[0009] 3. The traction garment is made of elastic material and can automatically fit the patient's body when worn, which can not only adapt to patients with different body types but also improve the comfort of the patient after wearing.

[0010] 4. Four traction ropes and four connectors are equipped around the traction garment, which can effectively ensure the safety of the patient in case of emergencies such as the patient accidentally falling.

[0011] 5. The present invention integrates multiple functions such as wheelchair fixation, automatic wearing of the traction garment, and assisting the patient to move, enabling the patient to operate independently and conduct gait rehabilitation training autonomously, improving the convenience and independence of the rehabilitation training. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the overall mechanism provided by the present invention.

[0013] Figure 2 It is a schematic internal structure diagram of the overall mechanism provided by the present invention.

[0014] Figure 3 It is a top view of the overall structure provided by the present invention.

[0015] Figure 4 It is a schematic structural diagram of the wheelchair fixation mechanism provided by the present invention.

[0016] Figure 5 It is a schematic overall structure diagram of the wearable device provided by the present invention.

[0017] Figure 6 It is a front view of the wearable device provided by the present invention.

[0018] Figure 7 It is a schematic overall structure diagram of the third mounting plate provided by the present invention.

[0019] Figure 8 It is a schematic transmission structure diagram of the moving part provided by the present invention.

[0020] Figure 9 It is a schematic overall transmission structure diagram of the wearable device provided by the present invention.

[0021] Description of the Reference Numerals:

[0022] In the figure, 100 is the support unit; 101 is the walking part; 102 is the protective shell; 110 is the conveyor belt; 120 is the contact unit; 130 is the support vertical rod; 140 is the support cross bar; 141 is the sliding groove; 150 is the first support plate; 151 is the first driving motor; 152 is the movement control rod; 153 is the first bevel gear; 160 is the second support plate; 161 is the mounting part; 200 is the wheelchair fixing mechanism; 210 is the sliding part; 211 is the sliding unit; 220 is the control rod; 221 is the second bevel gear; 230 is the connecting plate; 231 is the elastic part; 300 is the wearable device; 310 is the first mounting plate; 311 is the moving unit; 312 is the passing part; 313 is the hydraulic mechanism; 314 is the auxiliary control part; 320 is the second mounting plate; 321 is the second driving motor; 322 is the control part; 323 is the bevel gear part; 324 is the fixing rod; 330 is the third mounting plate; 331 is the first fixing plate; 332 is the rotating rod; 333 is the second fixing plate; 334 is the control bevel gear; 335 is the limiting groove; 336 is the passing groove; 337 is the limiting plate; 338 is the support part; 340 is the moving part; 341 is the limiting part; 342 is the stretching part; 350 is the connecting part; 360 is the traction garment; 361 is the main traction rope; 370 is the lifting plate; 371 is the lifting rod; 380 is the auxiliary traction rod; 381 is the rotating gear; 382 is the retracting wheel; 383 is the auxiliary traction rope; 384 is the auxiliary traction part. Detailed implementation mode

[0023] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can be implemented in various different forms. Therefore, the present invention is not limited to the embodiments described below. In addition, in order to describe the present invention more clearly, components not connected to the invention will be omitted from the drawings;

[0024] As Figure 2 、 Figure 3 shown, an upper limb automatic wearable gait weight-bearing training mechanism includes: a support unit 100, a wheelchair fixing mechanism 200, and a wearable device 300;

[0025] The lower end of the support unit 100 is fixedly arranged on the ground, and a ramp-shaped walking part 101 is arranged at its left end for the wheelchair to move. The support unit 100 has a protective shell 102;

[0026] The upper end of the support unit 100 is equipped with a conveyor belt 110 for the patient to walk;

[0027] The upper end of the support unit 100 and on the left side of the conveyor belt 110 is provided with a contact unit 120;

[0028] At the four corners of the upper end of the support unit 100, support vertical rods 130 are fixedly arranged, and support cross rods 140 are fixedly arranged between the upper ends of every two adjacent support vertical rods 130 on the left and right;

[0029] On the mutually approaching sides of the two support cross rods 140, sliding grooves 141 are arranged;

[0030] On the right end between the two support cross rods 140, a first support plate 150 is fixedly arranged;

[0031] On the right side of the first support plate 150, a first driving motor 151 is fixedly arranged;

[0032] At the center of the left end of the first support plate 150, a moving control rod 152 is rotatably installed, and the right end of the moving control rod 152 is fixedly connected to the output end of the first driving motor 151;

[0033] On the outer side of the moving control rod 152, threads are arranged;

[0034] At the left end of the moving control rod 152, a first bevel gear 153 is coaxially fixedly arranged;

[0035] At the left end of the first bevel gear 153 and between the two support cross rods 140, a second support plate 160 is fixedly arranged;

[0036] At the front and rear ends of the first bevel gear 153, mounting parts 161 are fixedly arranged on the second support plate 160;

[0037] As Figure 1 、 Figure 3 shown, the wheelchair fixing mechanism 200 includes: a sliding member 210, a control rod 220, and a connecting plate 230;

[0038] The sliding member 210 is L-shaped, and a sliding unit 211 is arranged on the lower side of one end close to the moving control rod 152, and the other end far from the moving control rod 152 extends downward to the lower end position of the wearing device 300;

[0039] The sliding unit 211 allows the sliding member 210 to slide back and forth on the upper end of the support cross rod 140;

[0040] Inside one end of the sliding member 210 close to the moving control rod 152, the control rod 220 is installed, and they are connected by threads;

[0041] At one end of the control rod 220 close to the moving control rod 152, a second bevel gear 221 is fixedly arranged, and the second bevel gear 221 meshes with the first bevel gear 153;

[0042] The control rod 220 at the position between the second bevel gear 221 and the sliding member 210 is rotatably mounted on the mounting member 161;

[0043] A connecting plate 230 is fixedly arranged on one side of the lower end of the sliding member 210 close to the movement control rod 152;

[0044] An elastic member 231 is slidably mounted on one side of the connecting plate 230 close to the movement control rod 152, and the connecting plate 230 and the elastic member 231 are connected by a spring to ensure the position fixation of the wheelchair when the wearable device 300 pulls the patient to get up or sit down;

[0045] As Figure 2 、 Figure 5 、 Figure 6 As shown, the wearable device 300 includes: a first mounting plate 310, a second mounting plate 320, a third mounting plate 330, a moving member 340, a connecting member 350, a traction garment 360, a lifting plate 370, and an auxiliary traction rod 380;

[0046] The front and rear ends of the first mounting plate 310 are slidably arranged in the sliding grooves 141 on the support cross bar 140;

[0047] A moving unit 311 is fixedly arranged at the center of the upper end of the first mounting plate 310, and a passing portion 312 through which the movement control rod 152 can pass is provided at the center of the moving unit 311, and they are in threaded cooperation therebetween;

[0048] Hydraulic mechanisms 313 are fixedly arranged at both ends of the moving unit 311 and at the upper end of the first mounting plate 310;

[0049] The output end of the hydraulic mechanism 313 passes through the first mounting plate 310 and is fixedly connected to the upper end of the second mounting plate 320;

[0050] Auxiliary control members 314 are fixedly arranged on the lower sides of the front and rear ends of the first mounting plate 310, and a rack is arranged on one side of the lower end of the auxiliary control member 314;

[0051] A second driving motor 321 is fixedly arranged at the center of the upper end of the second mounting plate 320;

[0052] The output end of the second driving motor 321 passes through the second mounting plate 320 and is fixedly connected to the upper end of the control member 322;

[0053] The control member 322 has a cavity inside, and threads are provided on its inner wall;

[0054] A bevel gear portion 323 is arranged at the lower end of the control member 322;

[0055] At the center positions of the four sides at the lower end of the second mounting plate 320, fixing rods 324 are fixedly arranged, and the lower ends of the fixing rods 324 are fixedly connected to the upper end of the third mounting plate 330;

[0056] As Figure 7 , Figure 8 shown, at the four corners of the upper end of the third mounting plate 330, first fixing plates 331 are fixedly arranged;

[0057] Rotating rods 332 are rotatably arranged on one side of the four first fixing plates 331 close to the control member 322, and threads are arranged on the outer side of one end of the rotating rod 332 close to the first fixing plate 331;

[0058] One end of the rotating rod 332 close to the control member 322 passes through the middle of the second fixing plate 333 and a control bevel gear 334 is arranged;

[0059] The second fixing plate 333 is fixedly arranged on the upper end of the third mounting plate 330;

[0060] The control bevel gear 334 meshes with the bevel gear portion 323;

[0061] The third mounting plate 330 is provided with a limiting groove 335 between the first fixing plate 331 and the second fixing plate 333;

[0062] A through groove 336 is arranged at the center of the third mounting plate 330;

[0063] Limiting plates 337 are fixedly arranged on the left and right sides at the lower end of the third mounting plate 330;

[0064] Support members 338 are fixedly arranged on the front and back sides at the lower end of the third mounting plate 330;

[0065] Moving members 340 are installed on the outer sides of the threaded portions of the four rotating rods 332, and the inner sides of the moving members 340 have threads and can cooperate with the rotating rods 332;

[0066] A limiting member 341 is arranged at the lower end of the moving member 340, and the limiting member 341 can be slidably installed in the limiting groove 335;

[0067] A stretching member 342 is arranged at the lower end of the limiting member 341;

[0068] One side of the lower ends of the four stretching members 342 close to the control member 322 is fixedly connected with a connecting member 350;

[0069] The connecting member 350 is made of a flexible material;

[0070] One end of the connecting member 350 away from the stretching member 342 is fixedly connected to the outer side of the traction garment 360;

[0071] The traction garment 360 is made of elastic material;

[0072] At the four corners of the upper end of the traction garment 360, main traction ropes 361 are fixedly connected;

[0073] The main traction ropes 361 are made of flexible material;

[0074] The upper ends of the main traction ropes 361 are fixedly connected to the lower end of the lifting plate 370;

[0075] At the center of the upper end of the lifting plate 370, a lifting rod 371 is fixedly arranged, and the outer side of the lifting rod 371 has threads;

[0076] The lifting rod 371 passes through the through groove 336 in the center of the third mounting plate 330 and is inserted into the cavity inside the control member 322, and is in threaded cooperation with it;

[0077] As Figure 6 、 Figure 9 shown, the lower ends of the two support members 338 are both passed through by the auxiliary traction rod 380, and they are installed in cooperation through bearings;

[0078] At both ends of the auxiliary traction rod 380, rotating gears 381 are arranged, and the rotating gears 381 are meshed with the racks on the lower end of the auxiliary control member 314;

[0079] The auxiliary traction rod 380 is symmetrically provided with two retracting wheels 382 along the center, and the retracting wheels 382 are located between the lifting plate 370 and the support member 338;

[0080] Auxiliary traction ropes 383 are wound on both of the two retracting wheels 382, and the lower ends of the auxiliary traction ropes 383 are located inside the traction garment 360 in the stretched state;

[0081] The lower ends of the auxiliary traction ropes 383 are fixedly connected with auxiliary traction members 384, and the middle parts of the auxiliary traction members 384 are hollowed out for the patient to grip.

[0082] Working principle:

[0083] First, when the device is working, the patient drives the wheelchair and moves the wheelchair to a position where it abuts against the contact unit 120 through the walking part 101. Subsequently, the first driving motor 151 drives the movement control rod 152 to rotate, so that the wearing device 300 moves above the patient through the cooperation between the movement control rod 152 and the through-hole thread on the movement unit 311. At the same time when the movement control rod 152 rotates, through the cooperation between the first bevel gear 153 and the two second bevel gears 221, the two control rods 220 rotate simultaneously to drive the two sliding parts 210 to move towards the patient, so that the elastic part 231 abuts against the wheelchair and limits the wheelchair. And when the sliding part 210 continues to move, it will compress the elastic part 231 to ensure the safety of the patient when getting up or sitting down under the traction of the wearing device 300;

[0084] Subsequently, the patient holds the auxiliary traction part 384 with both hands, and controls the second mounting plate 320 to descend through the hydraulic mechanism 313. At the same time when the second mounting plate 320 descends, the auxiliary traction rod 380 rotates through the engagement between the auxiliary control part 314 and the rotating gear 381, so as to control the auxiliary traction part 384 to rise, to help the patient lift both hands and keep the upper limbs of the patient upright;

[0085] Subsequently, the second driving motor 321 drives the control part 322 to rotate, so as to control the rotating rod 332 to rotate, to control the moving part 340 to move along the limiting groove 335, so that the traction garment 360 automatically fits the upper limb of the patient by the elasticity of the traction garment 360 itself. And the main traction rope 361 is located on the front and back sides of the patient's shoulders. At the same time when the control part 322 rotates, the lifting plate 370 will rise through the cooperation between the lifting rod 371 and the control part 322, so that the main traction rope 361 is always kept taut;

[0086] Subsequently, the hydraulic mechanism 313 controls the second mounting plate 320 to rise, to control the auxiliary traction rod 380 to rotate back and make the auxiliary traction part 384 drive the patient's arm to fall to the outside of the traction garment 360. Subsequently, the first driving motor 151 drives the movement control rod 152 to rotate back, so as to move the patient above the conveyor belt 110 for gait training.

Claims

1. An upper limb automatic wearable gait weight loss training mechanism, comprising a support unit (100), a wheelchair fixing mechanism (200), and a wearing device (300); characterized in that: The support unit (100) is fixedly provided with support vertical rods (130) at the four corners of the upper end, and a support cross rod (140) is fixedly provided between the upper ends of each two left and right adjacent support vertical rods (130); a sliding groove (141) is provided on the side where the two support cross rods (140) are close to each other; a first support plate (150) is fixedly provided at the right end between the two support cross rods (140); a first drive motor (151) is fixedly provided on the right side of the first support plate (150); and a first drive motor (151) is fixedly provided at the left end center of the first support plate (150). A mobile control rod (152) is rotatably mounted, and the right end of the mobile control rod (152) is fixedly connected to the output end of the first drive motor (151); a thread is arranged on the outer side of the mobile control rod (152); a first bevel gear (153) is coaxially fixedly arranged on the left end of the mobile control rod (152); both sides of the first bevel gear (153) are meshedly connected to the wheelchair fixing mechanism (200); a wearing device (300) is threadedly driven below the mobile control rod (152); and both sides of the wearing device (300) are slidably connected to the sliding groove (141).

2. The upper limb automatic wearable gait weight loss training mechanism according to claim 1, characterized in that: The wheelchair fixing mechanism (200) comprises: a sliding member (210), a control rod (220), and a connecting plate (230); the sliding member (210) is L-shaped, and a sliding unit (211) is arranged on the lower side of one end of the sliding member (210) close to the moving control rod (152), and the sliding unit (211) extends downward from the end of the sliding member (210) away from the moving control rod (152) to the lower end of the wearing device (300); the sliding unit (211) allows the sliding member (210) to slide forward and backward on the upper end of the supporting cross bar (140); the sliding member (210) is internally installed with a control rod (220) at one end of the sliding member (210) close to the moving control rod (152). The control rod (220) is connected to the movable control rod (152) by a threaded connection; a second bevel gear (221) is fixedly arranged at one end of the control rod (220) close to the movable control rod (152), and the second bevel gear (221) is meshed with the first bevel gear (153); a connecting plate (230) is fixedly arranged at one side of the lower end of the sliding member (210) close to the movable control rod (152); an elastic member (231) is slidably mounted at one side of the connecting plate (230) close to the movable control rod (152), and the connecting plate (230) and the elastic member (231) are connected by a spring.

3. The upper limb automatic wearable gait weight loss training mechanism according to claim 1 is characterized by: A second support plate (160) is fixedly arranged at the left end of the first bevel gear (153) and located between the two support cross bars (140); a mounting member (161) is fixedly arranged at both the front and rear ends of the second support plate (160) of the first bevel gear (153); and a control rod (220) between the second bevel gear (221) and the sliding member (210) is rotatably mounted on the mounting member (161).

4. The upper limb automatic wearable gait weight loss training mechanism according to claim 1, characterized in that: The wearing device (300) comprises: a first mounting plate (310), a second mounting plate (320), a third mounting plate (330), a moving part (340), a connecting part (350), a traction garment (360), a lifting plate (370), and an auxiliary traction rod (380); the front and rear ends of the first mounting plate (310) can be slidably arranged in a sliding groove (141) on a supporting cross bar (140); a moving unit (311) is fixedly arranged at the center of the upper end of the first mounting plate (310), and a through portion (312) is provided at the center of the moving unit (311) for the moving control rod (152) to pass through, and the two parts are threadedly matched; a hydraulic mechanism (313) is located at both ends of the moving unit (311) and is fixedly arranged at the upper end of the first mounting plate (310); the output end of the hydraulic mechanism (313) passes through the third mounting plate (330) and the second mounting plate (330) is fixedly arranged at the upper end of the first mounting plate (310); A mounting plate (310) is fixedly connected to the upper end of a second mounting plate (320); auxiliary control components (314) are fixedly arranged on the lower sides of both front and rear ends of the first mounting plate (310), and a rack is arranged on one side of the lower end of the auxiliary control component (314); a second drive motor (321) is fixedly arranged at the center of the upper end of the second mounting plate (320); the output end of the second drive motor (321) passes through the second mounting plate (320) and is fixedly connected to the upper end of the control component (322); the control component (322) has a cavity inside, and a thread is arranged on its inner wall; a bevel gear part (323) is arranged at the lower end of the control component (322); fixed rods (324) are fixedly arranged at the center positions of the four sides of the lower end of the second mounting plate (320), and the lower end of the fixed rod (324) is fixedly connected to the upper end of the third mounting plate (330).

5. The upper limb automatic wearable gait weight loss training mechanism according to claim 4, characterized in that: The first fixing plates (331) are fixedly arranged at the four corners of the upper end of the third mounting plate (330); the four first fixing plates (331) are rotatably arranged with rotating rods (332) on one side close to the control member (322), and the outer side of the rotating rod (332) close to the first fixing plate (331) is provided with a thread; the end of the rotating rod (332) close to the control member (322) passes through the middle of the second fixing plate (333) and is provided with a control bevel gear (334); the second fixing plate (333) is fixedly arranged on the upper end of the third mounting plate (330); the control bevel gear (334) and the bevel gear part (331) are connected to each other. 23) meshing; a limiting groove (335) is provided between the first fixing plate (331) and the second fixing plate (333) of the third mounting plate (330); a through groove (336) is provided at the center of the third mounting plate (330); limiting plates (337) are fixedly provided on both the left and right sides of the lower end of the third mounting plate (330); supporting members (338) are fixedly provided on both the front and rear sides of the lower end of the third mounting plate (330); moving members (340) are installed on the outer sides of the threaded parts of the four rotating rods (332), and the inner sides of the moving members (340) have threads and can cooperate with the rotating rods (332).

6. The upper limb automatic wearable gait weight loss training mechanism according to claim 4, characterized in that: A limiting member (341) is provided at the lower end of the movable member (340), and the limiting member (341) can be slidably installed in the limiting groove (335); a stretching member (342) is provided at the lower end of the limiting member (341); a connecting member (350) is fixedly connected to the lower end of the four stretching members (342) near the control member (322); the connecting member (350) is made of a flexible material; the end of the connecting member (350) away from the stretching member (342) is fixedly connected to the outer side of the traction garment (360); the traction garment (360) is made of an elastic material; the four corners of the upper end of the traction garment (360) are fixedly connected to A main traction rope (361) is provided; the main traction rope (361) is made of a flexible material; the upper end of the main traction rope (361) is fixedly connected to the lower end of a lifting plate (370); a lifting rod (371) is fixedly arranged at the center of the upper end of the lifting plate (370), and the outer side of the lifting rod (371) has a thread; the lifting rod (371) passes through a through groove (336) provided at the center of the third mounting plate (330) and is inserted into a cavity inside a control member (322), and is threadedly matched with the control member (322); the lower ends of the two support members (338) are both passed through by auxiliary traction rods (380), and are mounted therebetween by means of bearings.

7. The upper limb automatic wearable gait weight loss training mechanism according to claim 6, characterized in that: Both ends of the auxiliary traction rod (380) are provided with rotating gears (381), and the rotating gears (381) are meshed with the racks provided at the lower end of the auxiliary control member (314); the auxiliary traction rod (380) is symmetrically provided with two retracting wheels (382) along the center, and the retracting wheels (382) are located between the lifting plate (370) and the support member (338); an auxiliary traction rope (383) is wound around the two retracting wheels (382), and the lower end of the auxiliary traction rope (383) is located on the inner side of the traction garment (360) in a stretched state; the lower end of the auxiliary traction rope (383) is fixedly connected to the auxiliary traction member (384), and the middle part of the auxiliary traction member (384) is hollowed out for the patient to grasp.

8. The upper limb automatic wearable gait weight loss training mechanism according to claim 1, characterized in that: The lower end of the support unit (100) is fixedly arranged on the ground, and a sloped walking portion (101) is arranged at the left end thereof.

9. The upper limb automatic wearable gait weight loss training mechanism according to claim 1, characterized in that: A conveyor belt (110) is installed on the upper end of the support unit (100).

10. The upper limb automatic wearable gait weight loss training mechanism according to claim 1, characterized in that: A contact unit (120) is provided at the upper end of the support unit (100) and located on the left side of the conveyor belt (110).

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