Needle type sucker

Abstract

The utility model discloses a needle type sucker, which comprises a shell, a movable inner core arranged in the shell and at least one group of contact pin components arranged on the movable inner core, a first elastic tube used for driving the movable inner core to move downwards during expansion, a second elastic tube used for driving the movable inner core to move upwards during expansion, a third elastic tube used for driving the pin assembly to contract during expansion and a fourth elastic tube used for driving the pin assembly to open during expansion are arranged on the shell in a penetrating mode. The utility model has the advantages of simple structure, smaller volume and lower cost, and has strong market competitiveness.

Description

Technical Field

[0001] The utility model relates to the technical field of suction cup structures, in particular to a needle-type suction cup. Background Art

[0002] Among the existing mechanisms for grabbing cloth and fabrics, the needle suction cup is a very stable way of grabbing, which mainly uses two sets of needles that are angled with the suction cup plane to penetrate into the cloth and fabric. And the two sets of needles can be displaced in the direction of the needles relative to the plane. When grabbing, the suction cup plane is in contact with or very close to the grasped cloth, and the two sets of needles are displaced outward (in the direction of the needle tip) inside the plane, and the needles (tips) protrude from the suction cup plane. At this time, the two sets of needles are all inserted into the cloth and fabric, and the cloth and fabric are successfully grabbed; when putting it down, the two sets of needles are displaced in the opposite direction of the needle tips, and the needle tips are retracted into the suction cup plane, and the cloth and fabric are put down.

[0003] Existing needle suction cups, such as a needle suction cup disclosed in the utility model patent with patent publication (announcement) number CN220077831U, or a needle suction cup device used in a new composite material grabbing tooling disclosed in the utility model with patent publication (announcement) number CN215943750U, all use a cylinder-driven method to drive the insertion pin (suction cup needle) to extend and retract to achieve material grabbing or delivery. They have the defects of complex structure, large size and high cost. Therefore, the market is in urgent need of a needle suction cup with simple structure, smaller size and lower cost. Utility Model Content

[0004] The purpose of the utility model is to provide a needle-type suction cup, which has the advantages of simple structure, smaller volume and lower cost, and has strong market competitiveness.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a needle suction cup, comprising an outer shell, an active inner core arranged in the outer shell, and at least one group of pin assemblies arranged on the active inner core, the outer shell is penetrated by a first elastic tube for driving the active inner core downward when expanded, a second elastic tube for driving the active inner core upward when expanded, a third elastic tube for driving the pin assembly to contract when expanded, and a fourth elastic tube for driving the pin assembly to expand when expanded.

[0006] By adopting the above technical solution, when grabbing materials, it is only necessary to expand the first elastic tube and the third elastic tube first, the second elastic tube and the fourth elastic tube are in the initial state, and the movable inner core drives the pin assembly downward while the pin assembly contracts to grab materials; when feeding materials, the second elastic tube and the fourth elastic tube are expanded, and the first elastic tube and the third elastic tube are restored to the initial state, and the movable inner core drives the pin assembly upward while the pin assembly opens to release the materials. The needle suction cup does not require cylinder drive, has a simple and reliable structure, is smaller in size, significantly reduces production costs, and has strong market competitiveness.

[0007] The utility model is further configured such that a first through hole and a second through hole are provided on the movable inner core, the first elastic tube and the second elastic tube respectively penetrate the first through hole and the second through hole, and the first elastic tube is eccentric downward to the central axis of the first through hole, and the second elastic tube is eccentric upward to the central axis of the first through hole.

[0008] By adopting the above technical solution, the special eccentric structure design makes it possible for the movable inner core to have a tendency to move downward as long as the first elastic tube expands, even if the first elastic tube and the first through hole tend to be concentric; when the second elastic tube expands, the movable inner core will have a tendency to move upward, even if the second elastic tube and the second through hole tend to be concentric. In this way, the movable inner core drives the pin assembly to move downward, the structure is simpler and more reliable, and the production cost is lower.

[0009] The utility model is further configured such that the pin assembly comprises a first pin and a second pin rotatably arranged on a movable inner core, the upper and lower ends of the first pin corresponding to the rotation center are respectively provided with a first contraction force-bearing portion and a first expansion force-bearing portion, the upper and lower ends of the second pin corresponding to the rotation center are respectively provided with a second contraction force-bearing portion and a second expansion force-bearing portion, the third elastic tube is arranged between the first contraction force-bearing portion and the second contraction force-bearing portion, and the fourth elastic tube is arranged between the first expansion force-bearing portion and the second expansion force-bearing portion.

[0010] By adopting the above technical solution, as long as the fourth elastic tube expands, it can push the first expansion force-bearing part and the second expansion force-bearing part to expand outward to release the material. When the third elastic tube is driven to expand, the third elastic tube pushes the first contraction force-bearing part and the second contraction force-bearing part to expand outward, causing the first insertion pin and the second insertion pin to rotate, thereby causing the first expansion force-bearing part and the second expansion force-bearing part to contract, thereby realizing the grabbing of the material. The structure is simple and reliable, and the action is very rapid.

[0011] The utility model is further configured such that the outer end of the first expansion force-bearing portion is provided with a first needle extending toward a direction close to the second expansion force-bearing portion, and the outer end of the second expansion force-bearing portion is provided with a second needle extending toward a direction close to the first expansion force-bearing portion.

[0012] By adopting the above technical solution, by respectively arranging the first needle and the second needle on the first expansion force-bearing part and the second expansion force-bearing part, they can be accurately and smoothly inserted into the material to grasp the material when performing the expansion action, and the structure is more reliable.

[0013] The utility model is further configured such that a rotating shaft portion is provided on the inner side of the outer shell, a first annular rotating portion is provided on the first pin corresponding to a position between the first contraction force-bearing portion and the first expansion force-bearing portion, and a second annular rotating portion is provided on the second pin corresponding to a position between the second contraction force-bearing portion and the second expansion force-bearing portion, and the first annular rotating portion and the second annular rotating portion are sleeved on the outer periphery of the rotating shaft portion.

[0014] By adopting the above technical solution, the rotational installation of the second pin of the first pin can be realized, the structure is simple and reliable, and it is conducive to assembly production.

[0015] The utility model is further configured such that the first elastic tube, the second elastic tube, the third elastic tube and the fourth elastic tube are all flat-mouthed leather tubes, the first elastic tube and the second elastic tube are horizontally arranged, and the third elastic tube and the fourth elastic tube are vertically arranged.

[0016] By adopting the above technical solution, the first elastic tube and the second elastic tube are horizontally arranged, and when the medium is filled inside, they will expand and deform vertically, pushing the movable inner core to move upward or downward. The third elastic tube and the fourth elastic tube are vertically arranged, and when the medium is filled inside, they will expand and deform horizontally, causing the pin assembly to expand or contract.

[0017] The utility model is further configured such that a spring sheet is sleeved on the outer circumference of the first elastic tube, the second elastic tube, the third elastic tube and the fourth elastic tube, the spring sheet comprises a connecting portion and a first arc plate and a second arc plate symmetrically arranged at two ends of the connecting portion, and a movable gap is arranged between an end of the first arc plate away from the connecting portion and an end of the second arc plate away from the connecting portion; the first arc plate and the second arc plate of the spring sheet located on the outer circumference of the first elastic tube and the second elastic tube are arranged up and down, and the first arc plate and the second arc plate of the spring sheet located on the outer circumference of the third elastic tube and the fourth elastic tube are arranged left and right.

[0018] By adopting the above technical solution, a deformable spring sheet is arranged on the periphery of each elastic tube. When the elastic tube expands, the two arc plates on the spring sheet act on the movable inner core or the pin assembly, and the acting force is larger and more stable, making the suction cup action more reliable.

[0019] The utility model is further configured such that the shell includes two needle panels and limiting plates arranged on both sides of the two needle panels for connecting the two needle panels together, the two needle panels and the limiting plates form a hollow structure with upper and lower openings, and the needle panels are also provided with four external holes for the first elastic tube, the second elastic tube, the third elastic tube and the fourth elastic tube to pass through respectively, when the first elastic tube expands, the movable inner core drives the pin assembly downward and makes the lower end of the pin assembly extend out of the opening at the bottom of the shell, and when the second elastic tube expands, the movable inner core drives the pin assembly upward and makes the lower end of the pin assembly retract into the shell.

[0020] By adopting the above technical solution, the structure of the shell is simple and reliable, which is conducive to assembly and production.

[0021] The utility model is further configured to include an adjustment component, which includes an adjustment plate, an adjustment screw, an adjustment nut and a lock nut. The adjustment plate is installed on the top of the shell. A guide hole for the adjustment screw to pass through is opened on the adjustment plate. The screw head of the adjustment screw is connected to a movable inner core arranged inside the shell. The adjustment nut and the lock nut are threadedly connected to the screw portion of the adjustment screw located outside the shell, and the lock nut is tightly pressed against the adjustment nut.

[0022] By adopting the above technical solution, the vertical initial position of the movable inner core can be adjusted by rotating the adjusting nut, so as to control the stroke of the movable inner core, which is used to adjust the thickness of the material grasped and realize accurate grasping and delivery of materials.

[0023] The utility model is further configured such that the movable inner core includes mounting modules whose number is equal to that of the pin assemblies, and the mounting modules include a plurality of needle fixing plates arranged side by side and connected in sequence, and when the number of the pin assemblies and the mounting modules is more than two, a needle partitioning grid is provided between each two adjacent mounting modules for separating the two adjacent groups of pin assemblies.

[0024] By adopting the above technical solution, multiple groups of pin assemblies can be separated one by one to avoid mutual interference, thereby further improving the reliability of the pin suction cup action. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall appearance structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the pin assembly of the utility model;

[0028] Figure 4 A cross-sectional view of the utility model as a whole;

[0029] Figure 5 It is a schematic diagram of the matching structure of the first elastic tube and the spring sheet of the utility model;

[0030] Figure 6 It is a structural schematic diagram of the housing of the utility model;

[0031] Figure 7 It is a structural schematic diagram of the movable inner core of the utility model.

[0032] In the figure: 1, outer shell; 2, movable inner core; 3, pin assembly; 4, first elastic tube; 5, second elastic tube; 6, third elastic tube; 7, fourth elastic tube; 8, first through hole; 9, second through hole; 10, first pin; 11, second pin; 12, first contraction force-bearing part; 13, first expansion force-bearing part; 14, second contraction force-bearing part; 15, second expansion force-bearing part; 16, first needle head; 17, second needle head; 18, shaft part ; 19. First annular rotating part; 20. Second annular rotating part; 21. Spring sheet; 22. Connecting part; 23. First arc-shaped plate; 24. Second arc-shaped plate; 25. Movable gap; 26. Needle panel; 27. Limiting plate; 28. External hole; 29. ​​Adjusting assembly; 30. Adjusting plate; 31. Adjusting screw; 32. Adjusting nut; 33. Anti-loosening nut; 34. Guide hole; 35. Mounting module; 36. Needle fixing plate; 37. Needle spacer. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Example: As shown in the attached Figures 1 to 7The needle suction cup shown in the figure comprises a shell 1, an active inner core 2 arranged in the shell 1, and a pin assembly 3 arranged on the active inner core 2 and the number of which is at least one group. The shell 1 is provided with a first elastic tube 4 for driving the active inner core 2 downward when expanding, a second elastic tube 5 for driving the active inner core 2 upward when expanding, a third elastic tube 6 for driving the pin assembly 3 to contract when expanding, and a fourth elastic tube 7 for driving the pin assembly 3 to open when expanding. When the needle suction cup grabs the material, it only needs to first cause the first elastic tube 4 and the third elastic tube 6 to expand, the second elastic tube 5 and the fourth elastic tube 7 are in the initial state, the active inner core 2 drives the pin assembly 3 downward, and the pin assembly 3 contracts to grab the material; when the material is put in, the second elastic tube 5 and the fourth elastic tube 7 are caused to expand, and the first elastic tube 4 and the third elastic tube 6 return to the initial state, the active inner core 2 drives the pin assembly 3 upward, and the pin assembly 3 opens to release the material. The needle suction cup does not need to be driven by a cylinder, has a simple and reliable structure, is smaller in size, significantly reduces the production cost, and has strong market competitiveness.

[0035] As attached Figure 2 As shown, the movable inner core 2 is provided with a first through hole 8 and a second through hole 9, the first elastic tube 4 and the second elastic tube 5 penetrate the first through hole 8 and the second through hole 9 respectively, and the first elastic tube 4 is eccentric downward to the central axis of the first through hole 8, and the second elastic tube 5 is eccentric upward to the central axis of the first through hole 8. With the design of its special eccentric structure, as long as the first elastic tube 4 expands, the movable inner core 2 will have a tendency to move downward, even if the first elastic tube 4 and the first through hole 8 tend to be concentric; when the second elastic tube 5 expands, the movable inner core 2 will have a tendency to move upward, even if the second elastic tube 5 and the second through hole 9 tend to be concentric. In this way, the movable inner core 2 drives the pin assembly 3 to move downward, and the structure is simpler and more reliable, and the production cost is lower.

[0036] As attached Figure 2 and attached Figure 3As shown, the pin assembly 3 includes a first pin 10 and a second pin 11 which are rotatably arranged on the movable inner core 2. The first pin 10 is provided with a first contraction force-bearing portion 12 and a first expansion force-bearing portion 13 at the upper and lower ends corresponding to the rotation center, respectively. The second pin 11 is provided with a second contraction force-bearing portion 14 and a second expansion force-bearing portion 15 at the upper and lower ends corresponding to the rotation center, respectively. The third elastic tube 6 is arranged between the first contraction force-bearing portion 12 and the second contraction force-bearing portion 14, and the fourth elastic tube 7 is arranged between the first expansion force-bearing portion 13 and the second expansion force-bearing portion 15. As long as the fourth elastic tube 7 expands, the first expansion force-bearing portion 13 and the second expansion force-bearing portion 15 can be pushed to expand outwards to release the material. When the third elastic tube 6 is driven to expand, the third elastic tube 6 pushes the first contraction force-bearing portion 12 and the second contraction force-bearing portion 14 to expand outwards, causing the first pin 10 and the second pin 11 to rotate, thereby causing the first expansion force-bearing portion 13 and the second expansion force-bearing portion 15 to contract, thereby realizing the material grabbing. The structure is simple and reliable, and the action is very fast.

[0037] As attached Figure 3 As shown, the outer end of the first expansion force-bearing part 13 is provided with a first needle 16 extending toward the direction close to the second expansion force-bearing part 15, and the outer end of the second expansion force-bearing part 15 is provided with a second needle 17 extending toward the direction close to the first expansion force-bearing part 13. By arranging the first needle 16 and the second needle 17 on the first expansion force-bearing part 13 and the second expansion force-bearing part 15, respectively, they can be accurately and smoothly inserted into the material to grasp the material when performing the expansion action, and the structure is more reliable.

[0038] As attached Figure 2 and attached Figure 3 As shown, the inner side of the housing 1 is provided with a shaft portion 18, the first plug pin 10 is also provided with a first annular rotating portion 19 at a position corresponding to the first contraction force-bearing portion 12 and the first expansion force-bearing portion 13, the second plug pin 11 is also provided with a second annular rotating portion 20 at a position corresponding to the second contraction force-bearing portion 14 and the second expansion force-bearing portion 15, and the first annular rotating portion 19 and the second annular rotating portion 20 are sleeved on the outer periphery of the shaft portion 18; wherein the first contraction force-bearing portion 12, the first annular rotating portion 19 and the first expansion force-bearing portion 13 are an integrated structure, and the second contraction force-bearing portion 14, the second annular rotating portion 20 and the second expansion force-bearing portion 15 are an integrated structure. This design can realize the rotational installation of the second plug pin 11 of the first plug pin 10, and the structure is simple and reliable, which is conducive to assembly production.

[0039] The first elastic tube 4, the second elastic tube 5, the third elastic tube 6 and the fourth elastic tube 7 are all flat leather tubes. The first elastic tube 4 and the second elastic tube 5 are arranged horizontally, and the third elastic tube 6 and the fourth elastic tube 7 are arranged vertically. The first elastic tube 4, the second elastic tube 5, the third elastic tube 6 and the fourth elastic tube 7 can be connected to an inflatable device (such as an air pump). When inflated, the corresponding elastic tube expands. The first elastic tube 4 and the second elastic tube 5 are arranged horizontally. When the medium is filled in the inside, they will expand and deform vertically, pushing the movable inner core 2 to move upward or downward. The third elastic tube 6 and the fourth elastic tube 7 are arranged vertically. When the medium is filled in the inside, they will expand and deform horizontally, prompting the pin assembly 3 to expand or contract.

[0040] As attached Figure 2 and attached Figure 5 As shown, the outer peripheries of the first elastic tube 4, the second elastic tube 5, the third elastic tube 6 and the fourth elastic tube 7 are all sleeved with a spring sheet 21, which can be made of metal or plastic. The spring sheet 21 includes a connecting portion 22 and a first arc plate 23 and a second arc plate 24 symmetrically arranged at both ends of the connecting portion 22. An active gap 25 is arranged between the end of the first arc plate 23 away from the connecting portion 22 and the end of the second arc plate 24 away from the connecting portion 22. The first arc plate 23 and the second arc plate 24 of the spring sheet 21 located on the outer peripheries of the first elastic tube 4 and the second elastic tube 5 are arranged up and down, and the first arc plate 23 and the second arc plate 24 of the spring sheet 21 located on the outer peripheries of the third elastic tube 6 and the fourth elastic tube 7 are arranged left and right. A deformable spring sheet 21 is arranged on the outer periphery of each elastic tube. When the elastic tube expands, the two arc plates on the spring sheet 21 act on the active inner core 2 or the pin assembly 3, and the acting force is larger and more stable, making the suction cup action more reliable.

[0041] As attached Figure 6 As shown, the housing 1 includes two needle panels 26 and stopper plates 27 arranged on both sides of the two needle panels 26 for connecting the two needle panels 26 together. The two needle panels 26 and the stopper plates 27 form a hollow structure with upper and lower openings. The two needle panels 26 and the stopper plates 27 can be fixed together by welding. The needle panels 26 are also provided with four outer holes 28 for the first elastic tube 4, the second elastic tube 5, the third elastic tube 6 and the fourth elastic tube 7 to pass through. When the first elastic tube 4 expands, the movable inner core 2 drives the pin assembly 3 downward and makes the lower end of the pin assembly 3 extend out of the opening at the bottom of the housing 1. When the second elastic tube 5 expands, the movable inner core 2 drives the pin assembly 3 upward and makes the lower end of the pin assembly 3 retract into the housing 1. The structure of the housing 1 is simple and reliable, which is conducive to assembly production.

[0042] As attached Figure 4As shown, an adjustment component 29 is also included, and the adjustment component 29 includes an adjustment plate 30, an adjustment screw 31, an adjustment nut 32 and a lock nut 33. The adjustment plate 30 is installed at the top of the shell 1. The adjustment plate 30 is provided with a guide hole 34 for the adjustment screw 31 to pass through. The screw head of the adjustment screw 31 is connected to the movable inner core 2 arranged inside the shell 1. The adjustment nut 32 and the lock nut 33 are threadedly connected to the screw portion of the adjustment screw 31 located outside the shell 1, and the lock nut 33 is tightly pressed against the adjustment nut 32. By rotating the adjustment nut 32, the vertical initial position of the movable inner core 2 can be adjusted, so as to control the stroke of the movable inner core 2, which is used to adjust the thickness of the material to be grabbed, and to achieve accurate grabbing and delivery of materials. The lock screw is pressed against the adjustment nut 32, which can prevent the adjustment nut 32 from loosening.

[0043] As attached Figure 7 As shown, the movable inner core 2 includes mounting modules 35 of the same number as the pin assemblies 3, and the mounting modules 35 include a plurality of pin fixing sheets 36 arranged side by side and connected in sequence, and when the number of the pin assemblies 3 and the mounting modules 35 is more than two, a pin partitioning grid sheet 37 is provided between each two adjacent mounting modules 35 to separate the two adjacent groups of pin assemblies 3. This design can separate multiple groups of pin assemblies 3 one by one to avoid mutual interference, and further improve the reliability of the pin suction cup action.

Claims

1. A needle suction cup, characterized in that: The invention comprises an outer shell (1), a movable inner core (2) arranged in the outer shell (1), and at least one group of insertion pin assemblies (3) arranged on the movable inner core (2), wherein the outer shell (1) is provided with a first elastic tube (4) for driving the movable inner core (2) downward when expanding, a second elastic tube (5) for driving the movable inner core (2) upward when expanding, a third elastic tube (6) for driving the insertion pin assembly (3) to contract when expanding, and a fourth elastic tube (7) for driving the insertion pin assembly (3) to expand when expanding.

2. A needle suction cup according to claim 1, characterized in that: The movable inner core (2) is provided with a first through hole (8) and a second through hole (9); the first elastic tube (4) and the second elastic tube (5) respectively penetrate the first through hole (8) and the second through hole (9); the first elastic tube (4) is eccentric downward to the central axis of the first through hole (8), and the second elastic tube (5) is eccentric upward to the central axis of the first through hole (8).

3. A needle suction cup according to claim 2, characterized in that: The insertion pin assembly (3) comprises a first insertion pin (10) and a second insertion pin (11) which are rotatably arranged on the movable inner core (2); the first insertion pin (10) is provided with a first contraction force-bearing portion (12) and a first expansion force-bearing portion (13) at the upper and lower ends corresponding to the rotation center, respectively; the second insertion pin (11) is provided with a second contraction force-bearing portion (14) and a second expansion force-bearing portion (15) at the upper and lower ends corresponding to the rotation center, respectively; the third elastic tube (6) is arranged between the first contraction force-bearing portion (12) and the second contraction force-bearing portion (14); and the fourth elastic tube (7) is arranged between the first expansion force-bearing portion (13) and the second expansion force-bearing portion (15).

4. A needle suction cup according to claim 3, characterized in that: The outer end of the first expansion force-bearing portion (13) is provided with a first needle (16) extending in a direction close to the second expansion force-bearing portion (15), and the outer end of the second expansion force-bearing portion (15) is provided with a second needle (17) extending in a direction close to the first expansion force-bearing portion (13).

5. The needle suction cup according to claim 3, characterized in that: The housing (1) is provided with a rotating shaft (18) on the inner side, the first plug pin (10) is provided with a first annular rotating portion (19) at a position between the first contraction force-bearing portion (12) and the first expansion force-bearing portion (13), and the second plug pin (11) is provided with a second annular rotating portion (20) at a position between the second contraction force-bearing portion (14) and the second expansion force-bearing portion (15), and the first annular rotating portion (19) and the second annular rotating portion (20) are sleeved on the outer periphery of the rotating shaft (18).

6. A needle suction cup according to claim 3, characterized in that: The first elastic tube (4), the second elastic tube (5), the third elastic tube (6) and the fourth elastic tube (7) are all flat-mouthed leather tubes; the first elastic tube (4) and the second elastic tube (5) are arranged horizontally, and the third elastic tube (6) and the fourth elastic tube (7) are arranged vertically.

7. A needle suction cup according to claim 6, characterized in that: A spring sheet (21) is sleeved on the outer circumference of each of the first elastic tube (4), the second elastic tube (5), the third elastic tube (6) and the fourth elastic tube (7); the spring sheet (21) comprises a connecting portion (22) and a first arc-shaped plate (23) and a second arc-shaped plate (24) symmetrically arranged at both ends of the connecting portion (22); an active gap (25) is arranged between an end of the first arc-shaped plate (23) away from the connecting portion (22) and an end of the second arc-shaped plate (24) away from the connecting portion (22); the first arc-shaped plate (23) and the second arc-shaped plate (24) of the spring sheet (21) located on the outer circumference of the first elastic tube (4) and the second elastic tube (5) are arranged vertically, and the first arc-shaped plate (23) and the second arc-shaped plate (24) of the spring sheet (21) located on the outer circumference of the third elastic tube (6) and the third elastic tube (6) are arranged horizontally.

8. The needle suction cup according to claim 1, characterized in that: The housing (1) comprises two needle panels (26) and a stop plate (27) arranged on both sides of the two needle panels (26) for connecting the two needle panels (26) together. The two needle panels (26) and the stop plate (27) form a hollow structure with upper and lower openings. The needle panels (26) are also provided with four outer holes (28) for respectively passing the first elastic tube (4), the second elastic tube (5), the third elastic tube (6) and the fourth elastic tube (7). When the first elastic tube (4) expands, the movable inner core (2) drives the pin assembly (3) downward and causes the lower end of the pin assembly (3) to extend out of the opening at the bottom of the housing (1). When the second elastic tube (5) expands, the movable inner core (2) drives the pin assembly (3) upward and causes the lower end of the pin assembly (3) to be retracted into the housing (1).

9. A needle suction cup according to claim 1 or 8, characterized in that: The invention also comprises an adjustment component (29), the adjustment component (29) comprising an adjustment plate (30), an adjustment screw (31), an adjustment nut (32) and a locking nut (33), the adjustment plate (30) being mounted on the top of the housing (1), the adjustment plate (30) being provided with a guide hole (34) for the adjustment screw (31) to pass through, the screw head of the adjustment screw (31) being connected to a movable inner core (2) arranged inside the housing (1), the adjustment nut (32) and the locking nut (33) being threadedly connected to a screw portion of the adjustment screw (31) located outside the housing (1), and the locking nut (33) being tightly pressed against the adjustment nut (32).

10. The needle suction cup according to claim 1, characterized in that: The movable inner core (2) comprises mounting modules (35) whose number is equal to that of the insertion pin assemblies (3), and the mounting modules (35) comprise a plurality of needle fixing sheets (36) arranged side by side and connected in sequence, and when the number of the insertion pin assemblies (3) and the mounting modules (35) is more than two, a needle partitioning grid sheet (37) is provided between each two adjacent mounting modules (35) for separating the two adjacent groups of insertion pin assemblies (3).

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