Pneumatic scissors

Abstract

The utility model discloses a pair of pneumatic scissors, which comprises a scissor body and a pneumatic driving module, the cutter body comprises a first cutter body and a second cutter body which rotate relatively, the front ends of the first cutter body and the second cutter body are cutter heads, and the rear ends are cutter handles; chip stopping blocks are arranged on the outer side surfaces, far away from each other, of the first cutter body and the second cutter body; the pneumatic driving module comprises a mounting shell and a driving assembly; the cutter handle is located in the installation shell and matched with the driving assembly to conduct shearing work. The chip stopping block is located between the cutting edge and the driving assembly. Top openings are formed in the areas, close to the top, of the top end and the side surface of the mounting shell and used for exposing the area from the cutter body chip stopping block to the cutter head; the chip stopping block is located outside the installation shell and shields the top opening in the direction from the tool bit to the tool handle. And through the arrangement of the scrap stopping block, scraps are prevented from entering the driving assembly as much as possible, the possibility that the pneumatic driving module is damaged is reduced, and therefore the service life of the pneumatic driving module is prolonged, and faults and maintenance cost caused by the scraps are reduced.

Description

Technical Field

[0001] This utility model relates to the field of manufacturing and designing pneumatic tools, and more specifically, to a pneumatic scissors. Background Technology

[0002] In the current field of cutting tools, pneumatic scissors are widely used in various scenarios requiring cutting operations due to their high efficiency and labor-saving characteristics. Traditional pneumatic scissors typically consist of a blade body and a pneumatic drive unit, with the blade body performing the cutting operation powered by the pneumatic drive unit. However, in actual use, traditional pneumatic scissors have some problems that require further improvement. During the cutting process, the debris generated by traditional pneumatic scissors easily splatters to various parts of the scissors, especially inside the drive unit. This not only affects the cleanliness of the scissors but may also damage the drive unit, reducing its service life. Utility Model Content

[0003] This utility model overcomes the shortcomings of the prior art and provides a pneumatic scissors with a simple structure, reasonable design, and where debris does not easily affect or damage the pneumatic drive device.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A pneumatic scissor includes a blade body and a pneumatic drive module. The blade body includes a first blade and a second blade, which are movably coupled at their middle sections to achieve relative rotation. The front ends of the first and second blades are blade tips, and the rear ends of the first and second blades are handles. Opposing cutting edges are provided on the inner surfaces of the blade tips of the first and second blades. Chip-blocking blocks are provided on the outer surfaces of the first and second blades that are far apart from each other. The pneumatic drive module includes a mounting housing and a drive assembly. The blade body is mounted on the mounting housing, and the handle is located inside the mounting housing and cooperates with the drive assembly. The drive assembly drives the blade body to perform cutting operations. The chip-blocking blocks are located between the blade tips and the drive assembly. The top and side surfaces of the mounting housing have top openings near the top, allowing the area from the chip-blocking blocks to the blade tips to be exposed. The chip-blocking blocks are located outside the mounting housing and block the top openings from the blade tips to the handles.

[0006] Furthermore, the chip-blocking block is located at the junction of the middle of the first and second cutter bodies and the handle, and is positioned corresponding to the length direction of both the first and second cutter bodies.

[0007] Furthermore, the thickness of the chip block varies at different locations, with the largest thickness in the middle. The thickness of the chip block gradually decreases from the middle to the point near the cutter head and from the middle to the point near the cutter shank. The outer surface of the chip block where the thickness gradually decreases is transitioned with a smooth surface.

[0008] Furthermore, the driving assembly includes a driving part and a movable block driven by the driving part; an installation space is provided inside the mounting housing, and the movable block is movably disposed within the installation space; a bottom opening is provided at the bottom end of the mounting housing, and the driving part is assembled at the bottom opening of the mounting housing to cooperate with the movable block and drive it to move; a movable mating space is provided inside the movable block, and a mating opening is provided at the end of the movable block facing the blade body, and the blade handle is located in the movable mating space; the inner diameter of the movable mating space gradually changes from large to small from the end with the mating opening to the other end, and the inner wall of the movable mating space is a smooth inclined surface.

[0009] Furthermore, a return spring is provided between the handles of the first and second cutter bodies; mounting grooves are provided on the inner surfaces of the opposing handles of the first and second cutter bodies, and the two ends of the return spring are respectively located in the mounting grooves of the two cutter bodies.

[0010] Furthermore, a movable limiting assembly is also provided inside the mounting housing; the movable limiting assembly includes a movable rod, a limiting rod, and a transmission component; the transmission component is a gear, with the movable rod and the limiting rod located on both sides of the gear, and both the movable rod and the limiting rod are provided with mating teeth, which mesh with the gear; the limiting rod is located on the side of the gear closer to the cutter body, and the movable rod is located on the side of the gear closer to the drive unit; a mating part is provided on the movable block; the mating part cooperates with the movable rod and controls the extension and retraction of the movable rod; when the movable rod retracts, it drives the gear to rotate, thereby driving the limiting rod to extend outward, and the extended limiting rod is located on the movement path of the mating part.

[0011] Furthermore, the mating part is disposed on the outer surface of the movable block and is arranged circumferentially thereon; the diameter of the mating part is different at different locations, and the diameter of the side near the top opening is smaller than the diameter of the side near the bottom opening, and the outer surface of the mating part is a smooth inclined contact surface; the end of the movable rod abuts against the contact surface and moves under the drive of the movable block.

[0012] Furthermore, an assembly space is provided within the mounting housing, and a movable limiting component is disposed within the assembly space; the assembly space includes a first region, a second region, and a third region; the second region is located between and communicates with both the first and third regions, wherein the first region is located on the side of the second region closer to the blade body, and the third region is located on the side of the second region closer to the drive unit; the limiting rod is movably located within the first region, the movable rod is movably located within the third region, the gear is located within the second region, and the mating teeth of the limiting rod and the movable rod are located within the second region and mesh with the gear; both the first and third regions communicate with the mounting space; a compression spring is also provided within the third region, with both ends of the compression spring abutting against the inner wall of the third region and the end of the movable rod away from the contact surface, respectively.

[0013] Furthermore, guide blocks are set at both ends of the second region, and limiting channels are formed at both ends of the first and third regions by the distance between the guide blocks and the inner wall of the assembly space; the space at the limiting channel matches the size of the limiting rod and the movable rod where no mating teeth are provided; the gear and the mating teeth meshing with the gear are located between the guide blocks.

[0014] Furthermore, the thickness at the blade tip gradually decreases from the end near the handle to the end furthest from the handle.

[0015] Beneficial effects:

[0016] In this invention, the chip baffle acts as a barrier, preventing debris from entering the drive assembly as much as possible, reducing the possibility of damage to the pneumatic drive module, thereby extending the service life of the pneumatic drive module and reducing failures and maintenance costs caused by debris; at the same time, the chip baffle can also prevent the operator from being injured by flying debris to a certain extent.

[0017] In this invention, the chip blocking block is located at the junction of the first and second cutter bodies and the handle, and corresponds to the length direction of both the first and second cutter bodies. It can form a barrier as much as possible to block most of the flying debris, thereby reducing the risk of injury to the operator from the debris. It can also reduce the interference of debris on the operator, allowing the operator to focus more on the work itself and improve work efficiency.

[0018] In this invention, the chip-blocking block is designed to gradually thin out from the middle towards the blade head and handle. This design can reduce the interference of the chip-blocking block on the operation of the blade while maintaining sufficient chip blocking capability. This allows the chip-blocking block to maintain efficient chip blocking without affecting the flexibility and cutting efficiency of the blade.

[0019] In this invention, the smooth transition surface reduces the accumulation of debris on the chip block, making it easier for debris to slide off the surface of the chip block rather than remain on it, thereby reducing the impact of debris on the tool body and the operator.

[0020] In this invention, the movable block has an inner diameter difference in its movable mating space. As the movable block moves toward the blade body, the blade handle gradually penetrates into the movable mating space, and the inner diameter of the movable mating space becomes smaller and smaller. This causes the blade handles of the first and second blade bodies to gradually approach each other, thereby driving the blade body to perform a shearing function.

[0021] In this invention, the return spring allows the first and second blades to reset after the shearing action is completed, which not only improves the continuous working efficiency of the pneumatic scissors but also ensures the accuracy and consistency of each shearing action. The mounting groove not only ensures the stable installation of the return spring but also provides a larger contact surface between the return spring and the first and second blades, allowing the return spring to be subjected to force more evenly when it contracts, thereby improving the reliability of the reset action.

[0022] In this invention, the movable limiting component enables the pneumatic scissors to more precisely control the movement range of the blade during the cutting process. Through the interaction of the movable rod, the limiting rod, and the gear, the movement of the blade can be precisely limited, thereby ensuring the accuracy and consistency of each cutting action. At the same time, it can also prevent the blade from being damaged due to excessive movement.

[0023] In this invention, by setting a smooth and inclined contact surface, the movable rod can maintain a smooth transmission when sliding on the contact surface, avoiding vibration or error caused by sudden changes in direction or impact; at the same time, the smooth contact surface also helps to reduce friction and wear, improving the accuracy and reliability of the transmission.

[0024] In this invention, by subdividing the assembly space into a first region, a second region, and a third region, a precise layout of the movable limiting components is achieved. This partitioned design not only makes the structure more compact but also optimizes the cooperation between the components and improves the overall work efficiency.

[0025] In this invention, the directional path of the limiting rod and the movable rod during their extension and retraction is restricted by the limiting channel to prevent them from tilting; at the same time, the gear and the meshing teeth that mesh with the gear are located between the guide blocks, thereby controlling the extension and retraction distance of the limiting rod and the movable rod.

[0026] In this invention, the gradually decreasing thickness of the blade head allows the blade to more easily enter narrow spaces or closely fit the object being cut during the cutting process, thereby improving the efficiency and precision of the cutting. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the entire utility model.

[0028] Figure 2 for Figure 1 Cross-sectional view.

[0029] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0030] Figure 4 for Figure 2Enlarged view of point B in the middle.

[0031] Figure 5 This is a structural diagram of the front of the clamping shear body.

[0032] Figure 6 Structural diagram of the side of the clamping shear body

[0033] Figure 7 This is a structural diagram showing the assembly of the pneumatic drive module and the movable limit assembly after the clamping shear body has been removed.

[0034] Numbering on the map:

[0035] 1. Tool body; 2. Pneumatic drive module; 3. Chip block; 4. Mounting housing; 5. Drive assembly; 6. Movable limit assembly; 11. First tool body; 12. Second tool body; 13. Tool head; 14. Tool holder; 15. Cutting edge; 16. Connecting shaft; 17. Return spring; 18. Mounting slot; 41. Mounting space; 42. Top opening; 43. Bottom opening; 44. Assembly space; 45. Guide block; 46. Limiting channel; 47. Compression spring; 48. Return spring; 49. Mounting block; 51. Drive unit; 52. Movable block; 53. Movable mating space; 54. Mating opening; 55. Mating part; 56. Contact surface; 57. Abutment block; 61. Movable rod; 62. Limiting rod; 63. Transmission component; 64. Mating tooth; 441. First area; 442. Second area; 443. Third area. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific descriptions of the present invention, and their purpose is to enable those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limitations on the present invention.

[0037] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Example:

[0040] like Figure 1-7 As shown, a pneumatic scissor includes a blade body 1 and a pneumatic drive module 2. The blade body 1 includes a first blade 11 and a second blade 12, which are movably coupled at their middle parts to achieve relative rotation. The front ends of the first blade 11 and the second blade 12 are blade tips 13, and the rear ends of the first blade 11 and the second blade 12 are handles 14. Opposing blade edges 15 are provided on the inner surfaces of the blade tips 13 of the first blade 11 and the second blade 12. Chip-blocking blocks 3 are provided on the outer surfaces of the first blade 11 and the second blade 12 that are far apart from each other. The pneumatic drive module 2 includes a mounting housing 4 and a drive assembly 5. The blade body 1 is mounted on the mounting housing 4, and the handle 14 is located inside the mounting housing 4 and cooperates with the drive assembly 5, driven by the drive assembly 5. The moving blade 1 performs shearing operations; the chip-blocking block 3 is located between the blade 15 and the drive assembly 5; the top and side surfaces of the mounting housing 4 have a top opening 42 near the top, allowing the area from the chip-blocking block 3 to the blade head 13 to be exposed; the chip-blocking block 3 is located outside the mounting housing 4 and blocks the top opening 42 from the blade head 13 to the handle 14; the chip-blocking block 3 acts as a barrier, minimizing the entry of debris into the drive assembly 5, reducing the possibility of damage to the pneumatic drive module 2, thereby extending the service life of the pneumatic drive module 2 and reducing failures and maintenance costs caused by debris; at the same time, the chip-blocking block 3 can also prevent the operator from being injured by flying debris to a certain extent.

[0041] In this embodiment, the first blade 11 and the second blade 12 are connected by a connecting shaft 16 at their midpoints, allowing them to rotate relative to each other; and the connecting shaft 16 is connected to the mounting housing 4 to fix the first blade 11 and the second blade 12.

[0042] In this invention, the chip-blocking block 3 is located at the junction of the middle of the first blade body 11 and the second blade body 12 and the handle 14, and is arranged in the length direction corresponding to the first blade body 11 and the second blade body 12; it can form a barrier as much as possible to block most of the flying debris, thereby reducing the risk of injury to the operator from the debris; it can also reduce the interference of debris on the operator, allowing the operator to focus more on the work itself and improve work efficiency.

[0043] In this invention, the thickness of the chip-blocking block 3 varies at different points, with the thickest part being the middle. The thickness of the chip-blocking block 3 gradually decreases from the middle towards the blade head 13 and from the middle towards the handle 14. This design, where the chip-blocking block 3 gradually thins towards the blade head 13 and handle 14, can reduce the interference of the chip-blocking block 3 on the operation of the blade body 1 while maintaining sufficient chip-blocking capability. This ensures that the chip-blocking block 3 can effectively block chips without affecting the flexibility and cutting efficiency of the blade body 1.

[0044] In this embodiment, the outer surface of the chip block 3 at the point where the thickness gradually decreases is transitioned with a smooth surface; the smooth transition surface can reduce the accumulation of chips on the chip block 3, making it easier for chips to slide off the surface of the chip block 3 instead of remaining on it, thereby reducing the impact of chips on the cutter body 1 and the operator.

[0045] In this invention, the driving assembly 5 includes a driving part 51 and a movable block 52 driven by the driving part 51; a mounting space 41 is provided inside the mounting housing 4, and the movable block 52 is movably disposed within the mounting space 41; a bottom opening 43 is provided at the bottom end of the mounting housing 4, and the driving part 51 is assembled at the bottom opening 43 of the mounting housing 4 to cooperate with the movable block 52 and drive it to move; a movable mating space 53 is provided inside the movable block 52, and a mating opening 54 is provided at the end of the movable block 52 facing the blade body 1, so that the blade handle 14 is in a movable position. In the movable fitting space 53, the inner diameter of the movable fitting space 53 gradually changes from large to small from one end where the fitting opening 54 is set to the other end, and the inner wall of the movable fitting space 53 is a smooth inclined surface; the movable fitting space 53 of the movable block 52 has an inner diameter difference, so that when the movable block 52 moves toward the blade body 1, the blade handle 14 gradually penetrates into the movable fitting space 53, and at this time the inner diameter of the movable fitting space 53 becomes smaller and smaller, squeezing the blade handle 14 of the first blade body 11 and the second blade body 12 to gradually approach each other, so as to drive the blade body 1 to perform the shearing function.

[0046] In this utility model, a return spring 17 is provided between the handle 14 of the first blade 11 and the second blade 12. The return spring 17 enables the first blade 11 and the second blade 12 to reset after the cutting action is completed. This not only improves the continuous working efficiency of the pneumatic scissors, but also ensures the accuracy and consistency of each cutting action.

[0047] In this embodiment, mounting grooves 18 are provided on the inner surfaces of the first blade 11 and the second blade 12 opposite to the handle 14. The two ends of the return spring 17 are respectively located in the mounting grooves 18 of the two blades. The mounting grooves 18 not only ensure the stable installation of the return spring 17, but also enable the return spring 17 to have a larger contact surface 56 with the first blade 11 and the second blade 12, so that the return spring 17 can be subjected to force more evenly when it contracts, thereby improving the reliability of the reset action.

[0048] In this utility model, a movable limiting component 6 is also provided inside the mounting housing 4; the movable limiting component 6 includes a movable rod 61, a limiting rod 62, and a transmission component 63; the transmission component 63 is a gear, the movable rod 61 and the limiting rod 62 are located on both sides of the gear, and both the movable rod 61 and the limiting rod 62 are provided with mating teeth 64, which mesh with the gear; the limiting rod 62 is located on the side of the gear closer to the cutter body 1, and the movable rod 61 is located on the side of the gear closer to the drive part 51; a mating part 55 is provided on the movable block 52; the mating part 55 and the movable block 52 are mated with the drive part 51. The movable rod 61 cooperates with and controls the extension and retraction of the movable rod 61; when the movable rod 61 retracts, it drives the gear to rotate, thereby driving the limiting rod 62 to extend outward. The extended limiting rod 62 is located on the movement path of the mating part 55. The setting of the movable limiting component 6 enables the pneumatic scissors to more accurately control the movement range of the blade 1 during the cutting process. Through the interaction of the movable rod 61, the limiting rod 62 and the gear, the movement of the blade 1 can be precisely limited, thereby ensuring the accuracy and consistency of each cutting action; at the same time, it can also prevent the blade 1 from being damaged due to excessive movement.

[0049] In this invention, the mating part 55 is disposed on the outer surface of the movable block 52 and is arranged circumferentially thereon; the diameter of the mating part 55 varies at different locations, with the diameter on the side near the top opening 42 being smaller than the diameter on the side near the bottom opening 43, and the outer surface of the mating part 55 is a smooth, inclined contact surface 56; the end of the movable rod 61 abuts against the contact surface 56 and moves under the drive of the movable block 52; by setting the smooth, inclined contact surface 56, the movable rod 61 can maintain stable transmission when sliding on the contact surface 56, avoiding vibration or error caused by sudden changes in direction or impact; at the same time, the smooth contact surface 56 also helps to reduce friction and wear, improving the accuracy and reliability of transmission.

[0050] In this invention, an assembly space 44 is further provided inside the mounting housing 4, and a movable limiting component 6 is disposed within the assembly space 44. The assembly space 44 includes a first region 441, a second region 442, and a third region 443. The second region 442 is located between and communicates with the first region 441 and the third region 443, wherein the first region 441 is located on the side of the second region 442 closer to the blade body 1, and the third region 443 is located on the side of the second region 442 closer to the drive unit 51. The limiting rod 62 is movably located within the first region 441. The movable rod 61 is movably located in the third region 443, the gear is located in the second region 442, and the mating teeth 64 of the limiting rod 62 and the movable rod 61 are located in the second region 442 and mesh with the gear; both the first region 441 and the third region 443 are connected to the installation space 41; by subdividing the assembly space 44 into the first region 441, the second region 442 and the third region 443, the precise layout of the movable limiting component 6 is achieved; this partitioned design not only makes the structure more compact, but also optimizes the mating relationship between the components and improves the overall working efficiency.

[0051] In this invention, guide blocks 45 are provided at both ends of the second region 442, and limiting channels 46 are formed at both ends of the first region 441 and the third region 443 by the distance between the guide blocks 45 and the inner wall of the assembly space 44. The space at the limiting channel 46 matches the size of the limiting rod 62 and the movable rod 61 where the mating teeth 64 are not provided. The gear and the mating teeth 64 meshing with the gear are located between the guide blocks 45. The limiting channel 46 restricts the directional path of the limiting rod 62 and the movable rod 61 during their extension and retraction, preventing them from tilting. At the same time, the gear and the mating teeth 64 meshing with the gear are located between the guide blocks 45, thereby controlling the extension and retraction distance of the limiting rod 62 and the movable rod 61.

[0052] In this embodiment, a compression spring 47 is also provided in the third region 443. The two ends of the compression spring 47 abut against the inner wall of the third region 443 and the end of the movable rod 61 away from the contact surface 56, respectively. After the movable block 52 is reset, the compression spring 47 can drive the movable rod 61 to reset. At the same time, when the movable rod 61 is reset, it drives the gear and the limiting rod 62 to reset, so as to realize the overall reset of the movable limiting component 6.

[0053] In this embodiment, a reset spring 48 is also provided in the installation space 41. The two ends of the reset spring 48 abut against the movable block 52 and the inner wall of the installation space 41, respectively. The reset spring 48 assists the movable block 52 in resetting. The inner wall of the mounting space 41 is provided with a mounting block 49. The return spring 48 is located between the mounting block 49 and the movable block 52. One end of the return spring 48 abuts against or is fixed to the mounting block 49. The movable block 52 is columnar. The other end of the return spring 48 is sleeved on the movable block 52 and abuts against the mating part 55 to achieve stable assembly of the return spring 48. The mating part 55 abuts against the end of the return spring 48 and is also provided with an outwardly extending abutment block 57. The diameter of the abutment block 57 is larger than the diameter of the contact surface 56 near the top opening 42. When the limiting rod 62 extends outward, it is in the movement path of the abutment block 57. The abutment block 57 abuts against the limiting rod 62 to restrict the movement of the movable block 52. It is worth noting that after the limiting rod 62 extends, its extension length is only enough to abut against the abutment block 57 to avoid affecting the return effect of the return spring 48.

[0054] In this invention, the thickness of the blade head 13 gradually decreases from the end near the handle 14 to the end away from the handle 14. The design of the gradually decreasing thickness of the blade head 13 allows the blade body 1 to more easily enter narrow spaces or closely fit the object being cut during the cutting process, thereby improving the efficiency and accuracy of cutting.

[0055] It is worth noting that the other technical solutions of this utility model are all existing technologies, and therefore will not be described in detail.

[0056] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pneumatic scissor, comprising a blade body and a pneumatic drive module; the blade body includes a first blade body and a second blade body, the middle portions of which are movably engaged to achieve relative rotation; the front ends of the first and second blade bodies are blade tips, the rear ends of the first and second blade bodies are handles, and opposing cutting edges are provided on the inner surfaces of the blade tips of the first and second blade bodies; characterized in that, Chip-blocking blocks are provided on the outer surfaces of the first and second cutter bodies that are far apart from each other; The pneumatic drive module includes a mounting housing and a drive assembly; the blade is mounted on the mounting housing, and the blade holder is located inside the mounting housing and cooperates with the drive assembly, which drives the blade to perform shearing work. The chip-blocking block is located between the cutting edge and the drive assembly; The top and side surfaces of the mounting housing have top openings near the top, exposing the area from the chip block to the blade tip; the chip block is located outside the mounting housing and blocks the top openings in the direction from the blade tip to the handle.

2. The pneumatic scissors according to claim 1, characterized in that, The chip-blocking block is located at the junction of the middle of the first and second cutter bodies and the handle, and is positioned corresponding to the length direction of the first and second cutter bodies.

3. A pneumatic scissors according to claim 2, characterized in that, The thickness of the chip block varies at different points, with the largest thickness in the middle. The thickness of the chip block gradually decreases from the middle to the point near the cutter head and from the middle to the point near the cutter shank. The outer surface of the chip block where the thickness gradually decreases is transitioned with a smooth surface.

4. A pneumatic scissors according to claim 3, characterized in that, The drive assembly includes a drive unit and a movable block driven by the drive unit; an installation space is provided inside the mounting housing, and the movable block is movably disposed within the installation space; a bottom opening is provided at the bottom end of the mounting housing, and the drive unit is assembled at the bottom opening of the mounting housing to cooperate with the movable block and drive its movement. The movable block has a movable mating space, and a mating opening is provided at the end of the movable block facing the blade body. The blade handle is located in the movable mating space. The inner diameter of the movable mating space gradually changes from large to small from the end with the mating opening to the other end. The inner wall of the movable mating space is a smooth inclined surface.

5. A pneumatic scissors according to claim 4, characterized in that, A return spring is provided between the handles of the first and second cutter bodies; mounting grooves are provided on the inner surfaces of the handles of the first and second cutter bodies respectively, and the two ends of the return spring are respectively located in the mounting grooves of the two cutter bodies.

6. A pneumatic scissors according to claim 5, characterized in that, The mounting housing also contains a movable limiting assembly; the movable limiting assembly includes a movable rod, a limiting rod, and a transmission component; the transmission component is a gear, the movable rod and the limiting rod are located on both sides of the gear, and both the movable rod and the limiting rod are provided with mating teeth, which mesh with the gear; the limiting rod is located on the side of the gear closer to the cutter body, and the movable rod is located on the side of the gear closer to the drive unit; The movable block is provided with a mating part; the mating part cooperates with the movable rod and controls the extension and retraction of the movable rod; when the movable rod retracts, it drives the gear to rotate, thereby driving the limit rod to extend outward, and the extended limit rod is on the moving path of the mating part.

7. A pneumatic scissors according to claim 6, characterized in that, The mating part is disposed on the outer surface of the movable block and is arranged circumferentially thereafter; the diameter of the mating part is different at different locations, and the diameter of the side near the top opening is smaller than the diameter of the side near the bottom opening, and the outer surface of the mating part is a smooth and inclined contact surface; the end of the movable rod abuts against the contact surface and moves under the drive of the movable block.

8. A pneumatic scissors according to claim 6 or 7, characterized in that, An assembly space is also provided inside the mounting housing, and a movable limiting component is disposed within the assembly space. The assembly space includes a first region, a second region, and a third region. The second region is located between and communicates with both of the first and third regions. The first region is located on the side of the second region closer to the blade body, and the third region is located on the side of the second region closer to the drive unit. The limiting rod is movably located within the first region, the movable rod is movably located within the third region, the gear is located within the second region, and the mating teeth of the limiting rod and the movable rod are located within the second region and mesh with the gear. Both the first and third regions communicate with the mounting space. A compression spring is also provided within the third region, with its two ends abutting against the inner wall of the third region and the end of the movable rod furthest from the contact surface, respectively.

9. A pneumatic scissors according to claim 8, characterized in that, Guide blocks are set at both ends of the second region, and limiting channels are formed at both ends of the first and third regions by the distance between the guide blocks and the inner wall of the assembly space; the space at the limiting channel matches the size of the limiting rod and the movable rod where no mating teeth are provided; the gear and the mating teeth that mesh with the gear are located between the guide blocks.

10. A pneumatic scissors according to claim 1, characterized in that, The thickness of the blade tip gradually decreases from the end closest to the handle to the end furthest from the handle.

Images