Horn base direction detection reversing translation mechanism

Abstract

The utility model discloses a direction detection reversing translation mechanism for a horn base. The direction detection reversing translation mechanism comprises a working platform; two sets of parking grooves are formed in the parking base, openings of the two parking grooves are connected with a discharging port of the vibration disc through feeding channels correspondingly, two sets of detection grooves matched with the contour of a horn base are formed in the detection base, and a first servo sliding table and a second servo sliding table are erected and fixed to the working platform correspondingly. A first up-and-down air cylinder with the vertical movement direction is fixed to the sliding end of the first servo sliding table, a material taking suction cup base is fixed to the lifting end of the first up-and-down air cylinder, a pneumatic suction cup is arranged at the bottom of the material taking suction cup base, a second up-and-down air cylinder is fixed to the sliding end of the second servo sliding table, and a servo rotary table is fixed to the lower portion of the lifting end of the second up-and-down air cylinder. A mounting disc of a disc structure is fixed to the bottom of the rotating end of the servo rotary table, and a center suction cup and a feeding suction cup are arranged below the mounting disc. The automatic reversing device has the advantages of being capable of achieving automatic reversing, high in reversing accuracy and higher in reversing efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of speaker processing, and in particular relates to a speaker base direction detection and reversing translation mechanism. Background Art

[0002] The speaker base of the oval speaker, such as Figure 8 As shown, because the speaker wire needs to be installed on one side, a wire port (162 in the figure) is provided, so the speaker needs to maintain its correct orientation angle during subsequent assembly and processing. Due to the shape characteristics of the elliptical speaker, it generally has two angles, forward and reverse, after being discharged from the vibration plate. However, for the sake of standardization during processing, only speakers placed in the forward direction can be processed, so the speaker base in the reverse direction needs to be manually adjusted. However, manual adjustment of the speaker base orientation is time-consuming, and the error of manual adjustment is high, and the labor cost is high. Utility Model Content

[0003] The purpose of the utility model is to provide a speaker base direction detection and reversing translation mechanism to solve the technical problems in the above background technology that manual replacement is time-consuming, has high errors, and increases labor costs.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A speaker base direction detection and reversing translation mechanism comprises: a working platform; a parking seat and a detection seat of a block structure are fixed on the working platform; two groups of downwardly concave semi-open parking slots are provided on the parking seat; the openings of the two parking slots are connected through a feed channel and a discharge port of a vibration plate; the detection seat and the parking seat are arranged in parallel; two groups of detection slots that fit the contour of the speaker base are provided in the detection seat; two groups of first servo slides and second servo slides perpendicular to the direction of the feed channel are respectively fixed on the working platform; the sliding end of the first servo slide is fixed with a first upper and lower cylinder with a vertical movement direction; the lifting end of the first upper and lower cylinder is fixed There is a block-shaped material picking suction cup seat, and two groups of pneumatic suction cups are provided at the bottom of the material picking suction cup seat. The material picking suction cup seat can move to the top of the parking seat. The second servo slide is arranged on the side of the detection seat away from the parking seat. The sliding end of the second servo slide is fixed with a second upper and lower cylinder with a vertical movement direction. A servo turntable is fixed below the lifting end of the second upper and lower cylinders through a connecting plate. A mounting plate with a disc structure is fixed to the bottom of the rotating end of the servo turntable. A pneumatically controlled center suction cup is fixed to the center of the mounting plate. Pneumatically controlled feeding suction cups are provided on both sides of the mounting plate. The spacing between the feeding suction cups is consistent with the spacing between the two groups of detection slots in the detection seat.

[0006] Furthermore: In order to enable the present invention to have the ability to autonomously detect the direction of the speaker base, a group of emitting points for emitting infrared signals are provided in each of the detection slots, and two groups of receivers for receiving the infrared signals of the emitting points are provided at corresponding positions on the mounting plate (the speaker base is reserved with light-through holes whose position relationship is consistent with the position relationship of the emitting points in the detection slot during manufacturing).

[0007] Furthermore: in order to increase the infrared receiving accuracy of the receiver and the transmitting point, a group of fixing holes in the form of countersunk holes are provided at each of the four corners of the detection base, and bolts are screwed into the fixing holes to fix the detection base on the work platform.

[0008] Furthermore: in order to prevent the thickness of the center suction cup from affecting the adsorption effect of the feeding suction cup when the feeding suction cup is working, the detection seat is provided with a center suction cup avoidance recess in the middle of the two groups of detection slots for avoiding the center suction cup.

[0009] Furthermore: In order to be able to arrange and store the adjusted speaker base after the position of the speaker base is adjusted, a discharge strip platform with a plate structure is provided under the second servo slide, and the discharge strip platform is provided with a downwardly concave strip arrangement groove, and a block-shaped processing positioning seat is embedded in the arrangement groove. The width of the processing positioning seat is consistent with the width of the arrangement groove, and two sets of discharge placement grooves that fit the contour of the speaker base are provided in the processing positioning seat.

[0010] Furthermore: In order to be able to feed and discharge the arranged processing positioning seats, the discharge bar table is horizontally elevated and fixed on the working platform with a raised plate, and a pushing mechanism is provided in the gap between the working platform and the discharge bar table. The main body of the pushing mechanism is a pushing cylinder, which is fixed on the working platform or the discharge bar table. A pushing plate with a plate structure is fixed to the moving end of the pushing cylinder. A cutting groove with a length consistent with the length of the active stroke of the push plate is provided directly above the active stroke of the push plate to form a concave position, and a pushing tooth is provided above the push plate to slide and embed in the concave position.

[0011] Furthermore: in order to prevent the risk of displacement when the processing positioning seat is pushed, the width of the concave position is smaller than the width of the arrangement groove.

[0012] Furthermore: Sometimes the present invention will perform the reversing work of the speaker base with wires. In order to avoid the wires of the speaker base affecting the placement of the speaker base, the parking seat is provided with a first avoidance groove for avoiding the wires on the non-open side of the parking groove (the other side is semi-open and does not require avoidance), and the detection seat is provided with a second avoidance groove for avoiding the wires on both sides of the detection groove (the direction of the speaker base has not been adjusted, and there are two possible directions of the wires, so two-way avoidance is set); the processing positioning seat is provided with a third avoidance groove for avoiding the wires on one side of the discharge placement groove (the direction of the speaker base is adjusted to a unified direction, so only one-way avoidance is required).

[0013] Furthermore: in order to prevent the speaker base from having an angle disorder in the feed channel, the width of the channel on the feed channel is consistent with the narrowest width of the speaker base, and the vibration plate is provided with two channel outlets, the width of each outlet is consistent with the width of the channel on the feed channel, and the channel outlet of each vibration plate is respectively connected to a group of feed channels.

[0014] In summary, the present invention has the following beneficial effects:

[0015] Automatic reversing can be achieved with high reversing accuracy and faster reversing efficiency: through the establishment of feeding suction cup, center suction cup, receiver, detection slot and emission point, when reversing, the two sets of emission points in the detection seat are started to work. If the speaker base is placed in the detection slot in the correct direction, the infrared signal emitted by the emission point can pass through the light hole of the speaker base normally and be received by the receiver. If the infrared signal emitted by the emission point cannot be received normally by the receiver, it means that the placement direction of the speaker base is wrong. At this time, the servo turntable is controlled to reverse the rotation of the speaker base, and then the speaker base in the correct direction is embedded in the parking slot of the processing positioning seat to complete the direction detection and reversing operation of the speaker base. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the bottom structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the push-piece mechanism in the utility model;

[0019] Figure 4 yes Figure 1 A schematic diagram of the structure at center A;

[0020] Figure 5 yes Figure 1 A magnified schematic diagram of the structure at point B in the middle;

[0021] Figure 6 yes Figure 2 A magnified schematic diagram of the structure at point C in the middle;

[0022] Figure 7 yes Figure 3 A magnified schematic diagram of the structure at D in the middle;

[0023] Figure 8 It is a structural diagram of a speaker base in the background art;

[0024] In the figure, 1. working platform; 2. vibrating plate; 3. feeding channel; 4. parking seat; 5. material suction cup seat; 6. first upper and lower cylinders; 7. first servo slide; 8. second servo slide; 9. second upper and lower cylinders; 10. connecting plate; 11. servo turntable; 12. detection seat; 13. material discharging platform; 14. processing positioning seat; 15. material pushing mechanism; 16. speaker base; 161. wire opening; 162. light hole; 41. parking slot; 42 , first avoidance groove; 111, mounting plate; 112, feeding suction cup; 113, center suction cup; 114, receiver; 121, detection groove; 122, fixing hole; 123, center suction cup avoidance recess; 124, launching point; 125, second avoidance groove; 131, arrangement groove; 132, elevated plate; 133, recess; 141, discharge placement groove; 142, third avoidance groove; 151, pushing cylinder; 152, pushing plate; 153, pushing teeth. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings.

[0026] Example:

[0027] See also Figures 1-8 The utility model provides a technical solution: a speaker base direction detection and reversing translation mechanism, comprising: a working platform 1; a parking seat 4 and a detection seat 12 of a block-shaped structure are fixed on the working platform 1, and two groups of downwardly concave semi-open parking slots 41 are provided on the parking seat 4, and the openings of the two parking slots 41 are connected through a feed channel 3 and a discharge port of the vibration plate 2. The detection seat 12 and the parking seat 4 are arranged in parallel, and two groups of detection slots 121 that fit the contour of the speaker base 16 are provided in the detection seat 12. Two groups of first servo slides 7 and second servo slides 8 perpendicular to the direction of the feed channel 3 are respectively fixed on the working platform 1, and the sliding end of the first servo slide 7 is fixed with a first upper and lower cylinder 6 with a vertical movement direction, and the lifting end of the first upper and lower cylinder 6 is fixed There is a block-shaped material picking suction cup seat 5, and two groups of pneumatic suction cups are provided at the bottom of the material picking suction cup seat 5. The material picking suction cup seat 5 can move to the top of the parking seat 4. The second servo slide 8 is arranged on the side of the detection seat 12 away from the parking seat 4. The sliding end of the second servo slide 8 is fixed with a second upper and lower cylinder 9 with a vertical movement direction. A servo turntable 11 is fixed below the lifting end of the second upper and lower cylinder 9 through a connecting plate 10. A mounting plate 111 with a disc structure is fixed to the bottom of the rotating end of the servo turntable 11. A pneumatically controlled center suction cup 113 is fixed to the center of the mounting plate 111. Pneumatically controlled feeding suction cups 112 are provided on both sides of the mounting plate 111. The spacing between the feeding suction cups 112 is consistent with the spacing between the two groups of detection slots 121 in the detection seat 12.

[0028] In order to enable the present invention to have the ability to autonomously detect the direction of the speaker base, a group of emitting points 124 for emitting infrared signals are provided in each of the detection slots 121, and two groups of receivers 114 for receiving the infrared signals of the emitting points 124 are provided at corresponding positions on the mounting plate 111 (the speaker base 16 is reserved with a light-through hole 162 whose position relationship is consistent with the position relationship of the emitting points 124 in the detection slot 121 during manufacturing).

[0029] In order to increase the infrared receiving accuracy of the receiver 114 and the emitting point 124 , a group of fixing holes 122 in the form of countersunk holes are provided at each of the four corners of the detection base 12 . Bolts are screwed into the fixing holes 122 to fix the detection base 12 on the work platform 1 .

[0030] In order to prevent the thickness of the central suction cup 113 from affecting the adsorption effect of the feeding suction cup 112 when the feeding suction cup 112 is working, the detection seat 12 is provided with a central suction cup avoidance recess 123 in the middle of the two groups of detection slots 121 for avoiding the central suction cup 113.

[0031] In order to arrange and store the adjusted speaker base 16 after the position of the speaker base 16 is adjusted, a discharge strip platform 13 with a plate structure is provided under the second servo slide 8, and the discharge strip platform 13 is provided with a downwardly concave strip arrangement groove 131, and the arrangement groove 131 is embedded with a block-shaped processing positioning seat 14, and the width of the processing positioning seat 14 is consistent with the width of the arrangement groove 131. The processing positioning seat 14 is provided with two groups of discharge placement grooves 141 that fit the contour of the speaker base 16.

[0032] In order to be able to feed and discharge the arranged processing positioning seat 14, the discharge strip platform 13 is horizontally elevated and fixed on the working platform 1 using an elevated plate 132, and a pushing mechanism 15 is provided in the gap between the working platform 1 and the discharge strip platform 13. The main body of the pushing mechanism 15 is a pushing cylinder 151, and the pushing cylinder 151 is fixed on the working platform 1 or the discharge strip platform 13. A pushing plate 152 with a plate structure is fixed to the moving end of the pushing cylinder 151. The arrangement groove 131 is provided with a cutting groove with a length consistent with the length of the active stroke of the pushing plate 152 directly above the active stroke of the pushing plate 152 to form a recess 133, and a pushing tooth 153 is provided above the pushing plate 152 and is slidably embedded in the recess 133.

[0033] In order to prevent the machining positioning seat 14 from shifting when being pushed, the width of the recess 133 is smaller than the width of the arrangement slot 131 .

[0034] Sometimes the utility model will perform the reversing work of the wired speaker base 16. In order to avoid the wire of the speaker base 16 affecting the placement of the speaker base 16, the parking seat 4 is provided with a first avoidance groove 42 for avoiding the wire on the non-open side of the parking groove 41 (the other side is semi-open and does not need to avoid), and the detection seat 12 is provided with a second avoidance groove 125 for avoiding the wire on both sides of the detection groove 121 (the direction of the speaker base has not been adjusted, and there are two possible directions of the wire, so two-way avoidance is set); the processing positioning seat 14 is provided with a third avoidance groove 142 for avoiding the wire on one side of the discharge placement groove 141 (the direction of the speaker base is adjusted to a unified direction, so only one-way avoidance is required).

[0035] In order to prevent the speaker base 16 from being misaligned in the feed channel 3, the width of the channel on the feed channel 3 is consistent with the narrowest width of the speaker base 16, and the vibration disk 2 is provided with two channel outlets, the width of each outlet is consistent with the width of the channel on the feed channel 3, and the channel outlet of each vibration disk 2 is respectively connected to a group of feed channels 3.

[0036] Brief description of the usage process:

[0037] When in use, the semi-finished speaker base 16 is put into the vibrating plate 2, the vibrating plate 2 starts working, and the vibrating plate 2 arranges the speaker base 16 neatly and transports it to the feeding channel 3 (the working principle of the vibrating plate 2 is the same as that of the conventional vibrating plate, so it will not be repeated). The speaker base 16 on the feeding channel 3 enters the semi-open parking slot 41 of the parking seat 4 under the feeding of the vibrating plate 2, and then the first servo slide 7 is started to work, and the material picking suction cup seat 5 and the first upper and lower cylinders 6 are moved as a whole to the top of the parking seat 4, and then the first upper and lower cylinders 6 are started to extend, driving the pneumatic suction cup under the material picking suction cup seat 5 to contact the two groups of speaker bases 16, and then the pneumatic suction cup under the suction cup seat 5 is started. The pneumatic suction cup under the suction cup seat 5 works to adsorb the two groups of speaker bases 16 in the parking seat 4, and then the upper and lower cylinders 6 are controlled to shorten, driving the suction cup seat 5 and the two groups of speaker bases 16 adsorbed by it to move upward.

[0038] Then control the movement of the first servo slide 7 to move the material picking suction cup seat 5, the first upper and lower cylinders 6, and the two groups of speaker bases 16 as a whole to the top of the detection seat 12, and then start the first upper and lower cylinders 6 to extend, driving the two groups of speaker bases 16 under the material picking suction cup seat 5 to be embedded in the detection groove 121. At this time, the pneumatic suction cup under the suction cup seat 5 is controlled to release the speaker base 16, and then the first servo slide 7 and the first upper and lower cylinders 6 are reset, waiting for the next grabbing operation.

[0039] At this time, the two groups of emitting points 124 in the detection seat 12 are started again. If the placement direction of the speaker base 16 in the detection groove 121 is correct, the infrared signal emitted by the emitting point 124 can pass through the light hole 162 of the speaker base 16 normally and be received by the receiver 114. If the infrared signal emitted by the emitting point 124 cannot be received normally by the receiver 114, it means that the placement direction of the speaker base 16 is wrong. At this time, the second servo slide 8 is started. The second servo slide 8 drives the connecting plate 10 and the servo turntable 11 to move as a whole, so that the center of the servo turntable 11 is aligned with the top of the speaker base 16 in the wrong direction; at this time, the second upper and lower cylinders 9 are controlled to extend and drive the center suction cup 113 under the mounting plate 111 to contact the speaker base 16 in the wrong direction, and then the center suction cup 113 is started to start the adsorption work. The center suction cup 113 works to adsorb the speaker base 16 in the wrong direction in the parking seat 4, and then the second upper and lower cylinders 9 are controlled to shorten, driving the center suction cup 113 and the two groups of speaker bases 16 adsorbed by it to move upward.

[0040] Then control the servo turntable 11 to rotate 180 degrees (since the channel width of the discharge strip platform 13, the channel outlet width of the vibration disk 2 and the narrowest width of the speaker base 16 are consistent, the wrong direction can only be in the opposite direction, so it only needs to be rotated 180 degrees). At this time, the mounting plate 111, the center suction cup 113 and the speaker base 16 under the servo turntable 11 are driven to rotate 180 degrees to complete the correction of the wrong direction of the speaker base 16. At this time, control the second upper and lower cylinders 9 to extend, driving the center suction cup 113 and the two groups of speaker bases 16 it adsorbs downward, and embedding the speaker base 16 after the corrected direction into the original detection slot 121. At this time, release the center suction cup 113 to separate the center suction cup 113 and the speaker base 16.

[0041] In the same way as the above-mentioned control center suction cup 113 moves, the two groups of feeding suction cups 112 under the mounting plate 111 are respectively placed directly above the two groups of speaker bases 16 in the correct direction in the detection seat 12, and in the same way as the above-mentioned control center suction cup 113 moves, the feeding suction cups 112 adsorb and grab the two groups of speaker bases 16 in the correct direction. At this time, the second servo slide 8 is controlled to move, driving the second upper and lower cylinders 9, the connecting plate 10, the servo turntable 11, and the two groups of speaker bases 16 to move directly above the discharge strip platform 13, and then the second upper and lower cylinders 9 are controlled to extend, driving the two groups of feeding suction cups 112 and the two groups of speaker bases 16 adsorbed by them to move downward, and embedding the speaker bases 16 in the correct direction into the parking slot 41 of the processing positioning seat 14.

[0042] When the downstream speaker processing equipment needs to use the speaker base 16 in the correct position, the push cylinder 151 is controlled to shorten and reset, and the push cylinder 151 pushes all the processing positioning seats 14 in the arrangement groove 131 by one position through the push plate 152 and the push tooth 153. At this time, the downstream speaker processing equipment can grab the processing positioning seat 14 and the speaker base 16 therein at the end of the discharge bar 13 away from the recess 133 and send them to the next processing step. At this time, the processing positioning seat 14 provides positioning assistance during the processing of the speaker base 16. When the processing positioning seat 14 is processed, the empty processing positioning seat 14 will be placed on the arrangement groove 131 at the recess 133 by an external grabbing component (after the push cylinder 151 is shortened and reset, the arrangement groove 131 at the recess 133 will leave a position for placing the empty processing positioning seat 14), waiting for the next placement operation of the speaker base 16 in the correct direction.

[0043] The above steps are repeated repeatedly to complete the direction detection, reversal, and translation operations of the speaker base.

[0044] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A speaker base direction detection and reversing translation mechanism, comprising: The working platform (1) is characterized in that: a parking seat (4) and a detection seat (12) of a block structure are fixed on the working platform (1); two groups of downwardly concave semi-open parking grooves (41) are provided on the parking seat (4); the openings of the two parking grooves (41) are connected through a feed channel (3) and a discharge port of the vibration plate (2); the detection seat (12) and the parking seat (4) are arranged in parallel; two groups of detection grooves (121) that fit the contour of the speaker base (16) are provided in the detection seat (12); two groups of first servo slides (7) and second servo slides (8) perpendicular to the direction of the feed channel (3) are respectively fixed on the working platform (1); the sliding end of the first servo slide (7) is fixed with a first upper and lower cylinder (6) with a vertical movement direction; the lifting end of the first upper and lower cylinder (6) is fixed with a material taking suction cup seat of a block structure (5), two groups of pneumatic suction cups are provided at the bottom of the material-taking suction cup seat (5), and the material-taking suction cup seat (5) can move to the top of the parking seat (4). The second servo slide (8) is arranged on the side of the detection seat (12) away from the parking seat (4). The sliding end of the second servo slide (8) is fixed with a second upper and lower cylinder (9) with a vertical movement direction. A servo turntable (11) is fixed below the lifting end of the second upper and lower cylinders (9) through a connecting plate (10). A mounting plate (111) with a disc structure is fixed at the bottom of the rotating end of the servo turntable (11). A pneumatically controlled central suction cup (113) is fixed at the center of the mounting plate (111). Pneumatically controlled feeding suction cups (112) are provided on both sides of the mounting plate (111). The spacing between the feeding suction cups (112) is consistent with the spacing between the two groups of detection slots (121) in the detection seat (12).

2. The speaker base direction detection and reversing translation mechanism according to claim 1, characterized in that: A group of emitting points (124) for emitting infrared signals are respectively provided in the detection slots (121), and two groups of receivers (114) for receiving infrared signals from the emitting points (124) are provided at corresponding positions on the mounting plate (111).

3. The speaker base direction detection and reversing translation mechanism according to claim 2, characterized in that: A set of fixing holes (122) in the form of countersunk holes are respectively provided at the four corners of the detection seat (12), and bolts are screwed into the fixing holes (122) to fix the detection seat (12) on the working platform (1).

4. The speaker base direction detection and reversing translation mechanism according to claim 2, characterized in that: The detection seat (12) is provided with a center suction cup avoidance recess (123) which is concave downwards and used to avoid the center suction cup (113) in the middle of the two groups of detection slots (121).

5. The speaker base direction detection and reversing translation mechanism according to claim 1, characterized in that: A discharging platform (13) with a plate structure is provided below the second servo slide (8), and a downwardly concave strip arrangement groove (131) is provided on the discharging platform (13), and a processing positioning seat (14) with a block structure is embedded and arranged in the arrangement groove (131). The width of the processing positioning seat (14) is consistent with the width of the arrangement groove (131), and two groups of discharging placement grooves (141) that fit the contour of the speaker base (16) are provided in the processing positioning seat (14).

6. The speaker base direction detection and reversing translation mechanism according to claim 5, characterized in that: The discharging strip platform (13) is horizontally elevated and fixed on the working platform (1) by using an elevated plate (132). A pushing mechanism (15) is provided in the gap between the working platform (1) and the discharging strip platform (13). The main body of the pushing mechanism (15) is a pushing cylinder (151). The pushing cylinder (151) is fixed on the working platform (1) or the discharging strip platform (13). A pushing plate (152) with a plate structure is fixed to the moving end of the pushing cylinder (151). The arrangement groove (131) is provided with a cutting groove with a length consistent with the length of the moving stroke of the pushing plate (152) to form a concave position (133). A pushing tooth (153) is provided above the pushing plate (152) and is slidably embedded in the concave position (133).

7. The speaker base direction detection and reversing translation mechanism according to claim 6, characterized in that: The width of the concave position (133) is smaller than the width of the arrangement groove (131).

8. The speaker base direction detection and reversing translation mechanism according to claim 1 or 5, characterized in that: The parking seat (4) is provided with a first avoidance groove (42) for avoiding wire rods on the non-opening side of the parking groove (41); the detection seat (12) is provided with second avoidance grooves (125) for avoiding wire rods on both sides of the detection groove (121); and the processing positioning seat (14) is provided with a third avoidance groove (142) for avoiding wire rods on one side of the discharge placement groove (141).

9. The speaker base direction detection and reversing translation mechanism according to claim 1, characterized in that: The width of the upper channel of the feed channel (3) is consistent with the narrowest width of the speaker base (16); the vibration plate (2) is provided with two channel outlets, the width of each outlet is consistent with the width of the upper channel of the feed channel (3), and the channel outlet of each vibration plate (2) is respectively connected to a group of feed channels (3).

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