Scissor head structure and electric scissors

Abstract

The utility model discloses a scissor head structure and electric scissors, relate to scissors technical field, including first blade, second blade, connecting shaft, be provided with first connecting hole on the first blade, be provided with second connecting hole on the second blade, and the one end of connecting shaft is connected with the resistance cap portion, and the other end of connecting shaft is connected with fastener after passing through first connecting hole, second connecting hole in proper order, the fastener is screwed on the third axle segment along the axial direction of third axle segment, still be provided with anti -loosing axle on the third axle segment, and the anti -loosing axle is connected with the anti -loosing cap portion, and the anti -loosing axle is screwed on the third axle segment along the axial direction of third axle segment, and when the anti -loosing axle is tightened, the anti -loosing cap portion moves to the direction of being close to resistance cap portion and being close to fastener, the thread direction of anti -loosing axle and the thread direction of fastener are each other's reverse tooth setting, and the right and left tooth setting of fastener and anti -loosing axle makes fastener and anti -loosing axle can form anti -loosing resistance under the tightening condition.

Description

Technical Field

[0001] This utility model relates to the field of scissor technology, and in particular to a scissor head structure and an electric scissor. Background Technology

[0002] In existing literature, Chinese utility model publication CN213523146U discloses an electric scissor head structure, including a moving blade and a fixed blade. Both the moving blade and the fixed blade have connecting holes. The moving blade is connected to a straight pendulum tooth, which has a round hole that matches the connecting hole. The front end of the straight pendulum tooth has a protrusion. The moving blade has an insertion hole that matches the protrusion. The front part of the moving blade has a heat dissipation hole. The moving blade, the straight pendulum tooth, and the fixed blade are connected by a pin. The moving blade and the straight pendulum tooth are fixedly connected. The moving blade and the fixed blade are screwed together. The rear part of the fixed blade has a fixing hole, in which an anti-loosening screw is installed and engages with one end of the pin.

[0003] The invention proposes a mechanism to prevent loosening of the connection between the moving and stationary blades: a square washer with rounded corners is provided at the bottom of the nut of the anti-loosening screw. The pin located at one end of the stationary blade has annular teeth. One end face of the washer has teeth that match the annular teeth.

[0004] This design to prevent the moving blade from loosening its connection with the stationary blade requires additional installation space for the toothed gasket.

[0005] Chinese utility model patent application CN211832012U discloses a "blade mechanism and an electric scissors having the blade mechanism," and proposes a mechanism to prevent the fixed and moving blades from detaching: a rotating shaft assembly passes through the fixed and moving blades respectively; the rotating shaft assembly also includes an oil reservoir and a blade shaft, with the oil reservoir assembled between the fixed and moving blades, and the blade shaft sequentially passing through the fixed blade, the oil reservoir, and the moving blade; the rotating shaft assembly also includes a nut, which is threaded to the blade shaft and abuts against the moving blade; the rotating shaft assembly also includes an arc-shaped washer, which is clamped between the nut and the moving blade, and the arc-shaped washer has a certain curvature, bending towards the nut. The nut provides a preload to the arc-shaped washer, and the arc-shaped washer, through its own deformation, provides a preload to the moving blade. The rotating shaft assembly also includes a second screw, which is connected to the end of the blade shaft away from the oil passage and abuts against the nut, to prevent the nut from separating from the moving blade due to its own vibration during use, thereby affecting the tightness of the moving and fixed blades.

[0006] This anti-slip design minimizes space usage by keeping the screw connection on or near the blade shaft. However, its actual anti-slip effect is relatively low, and the screw connection is prone to loosening after prolonged use. Utility Model Content

[0007] To overcome the shortcomings mentioned above, this utility model aims to provide a scissor head structure that occupies less space and can better prevent the blade from loosening, as well as an electric scissor that uses the same structure.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a scissor head structure, including a first blade, a second blade, and a connecting structure. The first blade and the second blade are rotatably connected through the connecting structure. The connecting structure includes a connecting shaft. The first blade is provided with a first connecting hole that mates with the connecting shaft. The second blade is provided with a second connecting hole that mates with the connecting shaft. One end of the connecting shaft is connected to a stop cap corresponding to the first blade. The other end of the connecting shaft passes through the first connecting hole and the second connecting hole in sequence and is connected to a fastener. The fastener corresponds to the second blade.

[0009] in,

[0010] The connecting shaft includes a third shaft segment that mates with a fastener;

[0011] The fastener is screwed onto the third shaft section along the axial direction of the third shaft section, and is configured such that when the fastener is tightened, the fastener moves toward the direction of approaching the stop cap and the second blade.

[0012] The third shaft section is also equipped with an anti-slip shaft, and an anti-slip cap is connected to the anti-slip shaft.

[0013] The anti-detachment shaft is screwed onto the third shaft section along the axial direction, and is configured such that when the anti-detachment shaft is tightened, the anti-detachment cap moves toward the direction of approaching the stop cap and the fastener.

[0014] The thread direction of the anti-detachment shaft is reversed with the thread direction of the fastener.

[0015] A further technical solution of this utility model: The third shaft segment has a first external thread formed on the outer peripheral surface of the third shaft segment;

[0016] The fastener has a fastening hole corresponding to the third shaft segment. The fastening hole penetrates the fastener along the axial direction of the connecting shaft, and the fastening hole has a first internal thread that mates with the first external thread.

[0017] The third shaft segment is the end of the connecting shaft. The third shaft segment has an end face, and the end face of the third shaft segment is recessed to form an anti-disengagement hole. The anti-disengagement hole has a second internal thread.

[0018] The outer circumferential surface of the anti-detachment shaft is also provided with a second external thread that mates with the second internal thread;

[0019] The first internal thread and the second external thread are set to be reversed.

[0020] A further technical solution of this utility model: the fastening hole has a distal opening away from the blocking cap and a proximal opening close to the blocking cap;

[0021] The fastener has a guide groove formed on the side away from the stop cap, which communicates with the distal opening. The guide groove extends along the axial direction of the connecting shaft on the fastener.

[0022] The fastener is also provided with an axial transition piece, which is configured to be inserted into the fastening hole from the distal opening. The axial transition piece is provided with a positioning part that cooperates with the guide groove.

[0023] The anti-detachment shaft is screwed onto the third shaft section along the axial direction, and when the anti-detachment shaft is tightened, the anti-detachment cap pushes the axial transition piece toward the direction close to the blocking cap.

[0024] The axial transition member also consists of being pushed and pressed against the third shaft section by the anti-detachment cap.

[0025] A further technical solution of this utility model: the fastener has an extension portion that extends beyond the third shaft segment in the direction away from the stop cap, and both the fastening hole and the guide groove extend to open on the extension portion.

[0026] A further technical solution of this utility model: the axial transition member has a through hole corresponding to the anti-detachment shaft, and the anti-detachment shaft passes through the through hole and then enters the anti-detachment hole.

[0027] A further technical solution of this utility model: the anti-slip cap has an anti-slip inclined surface that contacts the axial transition member, and the anti-slip inclined surface is inclined along the direction close to the blocking cap and toward the anti-slip axis;

[0028] The axial transition piece has a contact slope that mates with the anti-detachment slope.

[0029] A further technical solution of this utility model: the connecting shaft also includes a second shaft segment that mates with the second connecting hole. The second shaft segment is a flat shaft, and the shape of the second connecting hole is adapted to the second shaft segment.

[0030] A further technical solution of this utility model: a planar bearing is provided between the blocking cap and the first blade;

[0031] The side of the stop cap corresponding to the first blade is formed with a bearing positioning groove corresponding to the planar bearing, and the planar bearing is set on the bearing positioning groove.

[0032] A further technical solution of this utility model: an oil storage groove is formed on the side of the second blade corresponding to the first blade, and the oil storage groove extends towards the connecting shaft;

[0033] The connecting shaft has an oil injection channel formed inside. The oil injection channel has a side connection port that communicates with the oil reservoir. The oil injection channel also has an oil injection port that extends towards the stop cap and is opened on the outside of the stop cap.

[0034] The oil reservoir has at least one lubrication guide groove extending in a direction away from the connecting shaft, and the second blade has a support surface corresponding to the first blade, with the lubrication guide groove extending into the support surface.

[0035] This utility model also provides the following technical solution: an electric scissor, including the above-mentioned scissor head structure.

[0036] Compared with the prior art, the beneficial effects of this technical solution are: the positive and negative thread settings of the fastener and the anti-loosening shaft enable the fastener and the anti-loosening shaft to form an anti-loosening barrier when tightened: for example, if the fastener has positive threads, it will rotate in the negative thread direction (counterclockwise) when loosened, and the rotation will drive the anti-loosening shaft to rotate. Since the anti-loosening shaft has negative threads, the counterclockwise rotation will make the threads tighten more and more. The rotation of the fastener achieves a better anti-loosening effect.

[0037] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of the electric scissors of this utility model;

[0040] Figure 2 This is another structural schematic diagram of the electric scissors of this utility model;

[0041] Figure 3 This is a schematic diagram of the scissor head structure of this utility model;

[0042] Figure 4 for Figure 3 Cross-sectional view of the structure along the AA direction;

[0043] Figure 5 This is an exploded view of the scissor head structure of this utility model;

[0044] Figure 6 This is another exploded view of the scissor head structure of this utility model;

[0045] Figure 7 This is a schematic diagram of the connecting shaft in this utility model.

[0046] The corresponding labels in the attached diagram are explained as follows:

[0047] First blade-1, first connecting hole-101

[0048] Second blade-2, second connecting hole-201, oil reservoir-202

[0049] Connecting shaft-3, first shaft section-301, second shaft section-302, third shaft section-303, first external thread-304, anti-detachment hole-305, second internal thread-306, oil injection channel-307, side connecting port-308, oil injection port-309, cover-310, lubrication guide groove-311, support surface-312.

[0050] Block cap-4, bearing positioning groove-401,

[0051] Fastener-5, Fastening hole-501, First internal thread-502, Guide groove-503, Extension part-504, Stop part-505

[0052] Axial transition component-6, positioning part-601, through hole-602, contact slope-603.

[0053] Anti-detachment shaft-7, second external thread-701,

[0054] Anti-slip cap section -8, Anti-slip bevel -801,

[0055] 9-plane bearing

[0056] Drive motor-10,

[0057] Power transmission assembly-11

[0058] Control Unit-12. Detailed Implementation

[0059] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0060] Please see Figure 1-7A scissor head structure includes a first blade 1, a second blade 2, and a connecting structure. The first blade 1 and the second blade 2 are rotatably connected via the connecting structure. The rotatable connection of the first blade 1 and the second blade 2 can correspondingly form a cutting action and a blade opening action.

[0061] The blade opening action is relative to the cutting action. The cutting action is when the opening of the scissor head formed by the first blade 1 and the second blade 2 decreases, while the blade opening action is when the opening of the scissor head formed by the first blade 1 and the second blade 2 increases.

[0062] The connecting structure includes a connecting shaft 3. The first blade 1 is provided with a first connecting hole 101 that mates with the connecting shaft 3, and the second blade 2 is provided with a second connecting hole 201 that mates with the connecting shaft 3. The connecting shaft 3 passes through the first connecting hole 101 and the second connecting hole 201, so that the first blade 1 and the second blade 2 are rotatably connected by the connecting shaft 3.

[0063] In this embodiment, one end of the connecting shaft 3 is connected to a stop cap 4 corresponding to the first blade 1, and the other end of the connecting shaft 3 is connected to a fastener 5 after passing through the first connecting hole 101 and the second connecting hole 201 in sequence. The fastener 5 corresponds to the second blade 2, and the first blade and the second blade 2 are held on the connecting shaft 3 by the fastener 5 and the stop cap 4.

[0064] In some embodiments, the blocking cap 4 is integrally formed on the connecting shaft 3.

[0065] In some embodiments, the fastener 5 may be detachably connected to the connecting shaft 3.

[0066] In this embodiment, the connecting shaft 3 includes a first shaft segment 301 that mates with the first connecting hole 101, a second shaft segment 302 that mates with the second connecting hole 201, and a third shaft segment 303 that mates with the fastener 5.

[0067] The fastener 5 can be screwed onto the third shaft segment 303. The fastener 5 has a stop portion 505 corresponding to the second blade 2. When the fastener 5 is screwed onto the third shaft segment 303, the stop portion 505 and the stop cap portion 4 are used to restrict the separation of the first blade 1 and the second blade 2, that is, to keep the first blade 1 and the second blade 2 on the connecting shaft 3.

[0068] In this embodiment, the third shaft segment 303 has a first external thread 304 formed on the outer peripheral surface of the third shaft segment.

[0069] The fastener 5 has a fastening hole 501 corresponding to the third shaft segment 303, and the fastening hole 501 has a first internal thread 502 that mates with the first external thread 304. After the third shaft segment 303 is inserted into the fastening hole 501, the fastener 5 is screwed into the first external thread 304 of the third shaft segment through the first internal thread 502 in the fastening hole, so that the fastener 5 can be screwed onto the third shaft segment 303.

[0070] In this embodiment, the third shaft segment 303 is the end of the connecting shaft 3, and the third shaft segment 303 has an end face, which is located away from the blocking cap 4.

[0071] The end face of the third shaft segment 303 is recessed and formed with an anti-detachment hole 305, and the anti-detachment hole 305 has a second internal thread 306.

[0072] The second internal thread 306 has a different thread direction from the first external thread 304: when the first external thread 304 is in the positive direction, the second internal thread 306 is in the opposite direction; or when the first external thread 304 is in the positive direction, the second internal thread 306 is in the reverse direction.

[0073] In this embodiment, the fastening hole 501 is a fastener 5 that passes through the axial direction of the connecting shaft 3. The fastening hole 501 has a distal opening away from the stop cap and a proximal opening close to the stop cap. The third shaft segment 303 is inserted into the fastening hole 501 from the proximal opening and screwed into the fastener 5.

[0074] The fastener 5 has a guide groove 503 formed on the side away from the stop cap, which communicates with the far end opening. The guide groove 503 extends along the axial direction of the connecting shaft 3 to form an axial guide groove; that is, the axial guide groove is in communication with the fastening hole.

[0075] In this embodiment, the scissor head structure also includes an axial transition member 6, which is configured to be inserted into the fastening hole 501 from the distal opening, and the axial transition member 6 is also configured to be movable toward the abutment cap to press against the third shaft segment 303.

[0076] like Figure 4 As shown, in some embodiments, after the fastener 5 is tightened, it extends beyond the third shaft segment 303, that is, in the direction away from the stop cap, the fastener 5 has an extension portion 504 that extends beyond the third shaft segment 303.

[0077] In this embodiment, the axial transition member 6 is provided with a positioning part 601 that cooperates with the guide groove 503. The guide groove 503 is used to restrict the axial transition member 6 with the positioning part from rotating, that is, the axial transition member 6 cannot rotate with the axis of the connecting shaft 3 as the rotation center line.

[0078] In this embodiment, the scissor head structure also includes an anti-detachment shaft 7 corresponding to the anti-detachment hole 305. An anti-detachment cap 8 corresponding to the axial transition piece 6 is connected to the anti-detachment shaft 7. A second external thread 701 that mates with the second internal thread 306 is also provided on the outer peripheral surface of the anti-detachment shaft 7.

[0079] The anti-detachment shaft 7 has a shaft segment with a second external thread 701 inserted into the anti-detachment hole 305, and the anti-detachment shaft 7 and the connecting shaft 3 are screwed together through the second external thread 701 and the second internal thread 306 on the connecting shaft.

[0080] During the process of screwing the anti-detachment shaft 7 and the connecting shaft 3 together, and under the guidance of the guide groove 503, the anti-detachment cap 8 pushes the axial transition piece 6 toward the direction of the blocking cap 4. Finally, the anti-detachment cap 8 presses the axial transition piece 6 onto the third shaft section 303, thus completing the tightening of the anti-detachment shaft 7 onto the connecting shaft 3.

[0081] In this embodiment, the forward and reverse thread configuration of the first thread (first internal thread, first external thread) and the second thread (second internal thread, second external thread) allows the fastener 5 and the anti-loosening shaft 7 to form an anti-loosening barrier when tightened: for example, if the fastener 5 has a forward thread, it will rotate in the reverse thread direction (counterclockwise) when loosened. When rotating, it will drive the axial transition piece 6 and the anti-loosening shaft 7 to rotate. The anti-loosening shaft 7 has a reverse thread, and the counterclockwise rotation will make the threads tighten more and more to prevent the axial transition piece 6 and the fastener 5 from rotating, so as to provide a better loosening effect.

[0082] When the fastener 5 is screwed tight, and then the anti-loosening shaft 7 is tightened onto the connecting shaft 3, the tightening process of the anti-loosening shaft 7 drives the axial transition piece 6 to move along the axial direction of the connecting shaft 3 and finally presses the axial transition piece 6 onto the third shaft section 303. During the tightening process of the anti-loosening shaft 7, the reverse force on the fastener 5 is less. After the anti-loosening shaft 7 is finally tightened, the anti-loosening shaft 7 is tightened onto the connecting shaft 3 through the anti-loosening cap 8 and the axial transition piece 6. The tightening of the anti-loosening shaft 7 is mainly limited by the force applied by the connecting shaft 3, which reduces the force on the fastener 5, thus better tightening and preventing loosening. That is, the setting of the axial transition piece 6 allows the axial transition piece 6 to slide on the fastener 5 during the tightening of the anti-loosening shaft 7, so that the anti-loosening shaft 7 has less impact on the fastener 5. After tightening, the rotation of the axial transition piece 6 on the fastener 5 can be restricted, so that the anti-loosening effect of the forward and reverse threads can be better achieved.

[0083] In some embodiments, a specific force-bearing structure may be provided on the outer side of the fastener 5 to make the fastener 5 easier to be tightened onto the connecting shaft 3. For example, the outer side of the fastener 5 may be provided as a flat shaft shape, an external hexagonal shape, etc.

[0084] In some embodiments, a specific force-bearing structure may be provided on the outer side of the anti-detachment cap 8 to make it easier for the anti-detachment shaft 7 to be tightened onto the connecting shaft 3. For example, the outer side of the anti-detachment cap 8 may be provided with a Phillips screwdriver hole, an internal hexagon hole, etc.

[0085] In some embodiments, the axial transition member 6 has a through hole 602 corresponding to the anti-detachment shaft 7, and the anti-detachment shaft 7 passes through the through hole 602 and then enters the anti-detachment hole 305.

[0086] In some embodiments, the anti-slip cap portion 8 has an anti-slip inclined surface 801 that contacts the axial transition member 6. The anti-slip inclined surface 801 is inclined in a direction close to the anti-slip cap portion and toward the anti-slip axis. For example, the anti-slip inclined surface 801 is generally configured as a conical or conical shape.

[0087] The axial transition member 6 has a contact slope 603 that mates with the anti-loosening slope 801. During the tightening of the anti-loosening shaft 7, the rotational engagement between the anti-loosening cap 8 and the axial transition member 6 is satisfied; after tightening, the force-bearing area between the axial transition member 6 and the anti-loosening cap 8 is increased, thereby creating a better anti-loosening effect on the fastener 5 and making it less likely to loosen after the fastener 5 is tightened.

[0088] In some embodiments, at least two guide grooves 503 are provided.

[0089] In some embodiments, the connecting shaft 3 is restricted from rotating on the second blade 2, or it can be understood that the second blade 2 cannot rotate on the connecting shaft 3; that is, when the connecting shaft 3 rotates relative to the first blade 1, the second blade 2 follows the connecting shaft 3 and rotates relative to the first blade 1.

[0090] In this way, when tightened, the rotation of the connecting shaft 3 and the second blade 2 can be avoided, and the tightening and anti-detachment structure composed of the fastener 5, the anti-detachment shaft 7 and the connecting shaft 3 can be well maintained.

[0091] In some embodiments, a portion of the outer side of the second shaft segment 302 may be removed to form an incomplete circular radial cross-section, such as a circular cross-section with chamfers.

[0092] like Figure 7 As shown, the second shaft segment 302 can be configured as a flat shaft, and correspondingly, the shape of the second connecting hole 201 is adapted to the second shaft segment 302.

[0093] Correspondingly, the third shaft segment can be set to a smaller diameter so that the third shaft segment can pass smoothly through the second connecting hole 201; or the third shaft segment 303 can also be set to a corresponding flat shaft so that the third shaft segment 303 can pass smoothly through the second connecting hole 201.

[0094] In some embodiments, a first friction reduction setting is provided between the stop cap 4 and the first blade 1, for example, a bearing is provided between the stop cap 4 and the first blade 1, such as a plane bearing 9.

[0095] In some embodiments, a bearing positioning groove 401 corresponding to a planar bearing is formed on the side of the stop cap 4 corresponding to the first blade. The planar bearing 9 is disposed on the bearing positioning groove 401, and the axis of the connecting shaft 3 or the extension of the axis forms an inner channel passing through the axial direction of the planar bearing 9.

[0096] The first axial force-bearing end of the plane bearing 9 corresponds to the stop cap 4, and the second axial force-bearing end of the plane bearing 9 corresponds to the first blade 1; that is, the plane bearing 9 is located between the stop cap 4 and the first blade 1, and the stop cap 4 can press the first blade 1 through the plane bearing 9.

[0097] When the first blade 1 rotates relative to the stop cap 4, the plane bearing 9 makes it easier to rotate, avoiding direct contact and hard friction between the first blade 1 and the stop cap 4.

[0098] In some embodiments, the axis of the connecting shaft 3 or its extension coincides with the axial centerline of the inner channel of the plane bearing 9.

[0099] In some embodiments, a second friction reduction setting is provided between the first blade 1 and the second blade 2, for example, by adding grease or lubricating oil between the first blade 1 and the second blade 2.

[0100] In some embodiments, an oil reservoir 202 is formed on the side of the second blade 2 corresponding to the first blade, and the oil reservoir 202 extends toward the connecting shaft 3.

[0101] The connecting shaft 3 has an oil injection channel 307 formed inside. The oil injection channel 307 has a side connection port 308 that communicates with the oil reservoir 202. The oil injection channel 307 also has an oil injection port 309 that extends toward the stop cap and is opened on the outside of the stop cap.

[0102] After the connecting shaft 3 passes through the corresponding first connecting hole 101 and second connecting hole 201 on the first blade 1 and the second blade 2, and the first blade 1 is pressed onto the second blade 2 by the abutment cap 4 (or by the plane bearing 9), the side connection port 308 of the oil injection channel 307 is connected to the oil storage tank 202.

[0103] Users can inject grease or lubricating oil through the exposed oil inlet 309 on the stop cap. The grease or lubricating oil is injected into the oil reservoir 202 through the oil injection channel 307 to lubricate between the first blade 1 and the second blade 2. At the same time, the oil injection channel 307 forms an additional oil storage space to make full use of the volume occupied by the connecting shaft 3 and the stop cap 4.

[0104] In some embodiments, the stop cap 4 is provided with a cap 310 or plug that can block the oil filling port. When oil needs to be filled, the cap 310 or plug is opened or removed to fill the oil. After the oil filling is completed, the cap 30 or plug is closed or the cap 310 or plug is put back on to avoid or reduce oil overflow.

[0105] In some embodiments, the oil reservoir 202 has at least one lubrication guide groove 311 extending in a direction away from the connecting shaft 3. During oil filling, lubricating oil can also be injected into the lubrication guide groove 311 through the oil reservoir 202.

[0106] The second blade 2 has a support surface 312 corresponding to the first blade 1, and a lubrication guide groove 311 extends into the support surface 312.

[0107] When the first blade 1 rotates relative to the second blade 2, at least one friction part of the first blade 1 can switch between corresponding to the support surface 312 and the lubrication guide groove 311. When rotating to correspond with the lubrication guide groove 311, the lubricating oil in the lubrication guide groove 311 can be applied to the friction part. When rotating to correspond with the support surface 312 of the first blade, the lubricating oil applied to the friction part can reduce the friction between the friction part and the support surface 312. At the same time, by utilizing the support part, the lubrication guide groove 311 further increases the oil storage space and better reduces friction.

[0108] In some embodiments, the oil reservoir 202 is configured to be arranged around the outer peripheral surface of the connecting shaft 3, that is, when the connecting shaft 3 rotates along its axis to adjust its position, the oil reservoir 202 can remain connected to the oil injection channel 307 after the connecting shaft 3 has been rotated to adjust its position.

[0109] For example, when the second shaft segment 302 is set as a flat shaft, the connecting shaft 3 can be rotated to adjust its position before being inserted into the first connecting hole 101 and the second connecting hole 201. After adjusting its position, it can be inserted into the first connecting hole 101 and the second connecting hole 201. After installation, the oil reservoir 202 can maintain communication with the oil injection channel 307.

[0110] In this embodiment, an electric scissor is also proposed. The electric scissor uses the scissor head structure of any of the above embodiments. The electric scissor drives at least one blade (first blade or second blade) in the scissor head structure to form a cutting action and a blade opening action.

[0111] In some embodiments, the electric scissors include a housing (not shown), a drive motor 10, a power transmission assembly 11, and a control unit 12. The control unit 12 controls the drive motor 10 to work, and the drive motor 10 drives the corresponding blade to rotate through the power transmission assembly 11.

[0112] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A scissor head structure, comprising a first blade, a second blade, and a connecting structure, wherein the first blade and the second blade are rotatably connected via the connecting structure, the connecting structure comprising a connecting shaft, the first blade having a first connecting hole that mates with the connecting shaft, the second blade having a second connecting hole that mates with the connecting shaft, one end of the connecting shaft being connected to a stop cap corresponding to the first blade, and the other end of the connecting shaft being connected to a fastener after passing through the first connecting hole and the second connecting hole in sequence, the fastener corresponding to the second blade, characterized in that... The connecting shaft includes a third shaft segment that mates with a fastener; The fastener is screwed onto the third shaft section along the axial direction of the third shaft section, and is configured such that when the fastener is tightened, the fastener moves toward the direction of approaching the stop cap and the second blade. The third shaft section is also equipped with an anti-slip shaft, and an anti-slip cap is connected to the anti-slip shaft. The anti-detachment shaft is screwed onto the third shaft section along the axial direction, and is configured such that when the anti-detachment shaft is tightened, the anti-detachment cap moves toward the direction of approaching the stop cap and the fastener. The thread direction of the anti-detachment shaft is reversed with the thread direction of the fastener.

2. The scissor head structure according to claim 1, characterized in that, The third shaft segment has a first external thread formed on the outer peripheral surface of the third shaft segment; The fastener has a fastening hole corresponding to the third shaft segment. The fastening hole penetrates the fastener along the axial direction of the connecting shaft, and the fastening hole has a first internal thread that mates with the first external thread. The third shaft segment is the end of the connecting shaft. The third shaft segment has an end face, and the end face of the third shaft segment is recessed to form an anti-disengagement hole. The anti-disengagement hole has a second internal thread. The outer circumferential surface of the anti-detachment shaft is also provided with a second external thread that mates with the second internal thread; The first internal thread and the second external thread are set to be reversed.

3. The scissor head structure according to claim 2, characterized in that, The fastening hole has a distal opening away from the stop cap and a proximal opening close to the stop cap; The fastener has a guide groove formed on the side away from the stop cap, which communicates with the distal opening. The guide groove extends along the axial direction of the connecting shaft on the fastener. The fastener is also provided with an axial transition piece, which is configured to be inserted into the fastening hole from the distal opening. The axial transition piece is provided with a positioning part that cooperates with the guide groove. The anti-detachment shaft is screwed onto the third shaft section along the axial direction, and when the anti-detachment shaft is tightened, the anti-detachment cap pushes the axial transition piece toward the direction close to the blocking cap. The axial transition piece also consists of a cap that pushes the anti-slip cap onto the third shaft section.

4. The scissor head structure according to claim 3, characterized in that, The fastener has an extension beyond the third shaft section in the direction away from the stop cap, and both the fastening hole and the guide groove extend to open on the extension.

5. The scissor head structure according to claim 3 or 4, characterized in that, The axial transition piece has a through hole corresponding to the anti-detachment shaft, and the anti-detachment shaft passes through the through hole and then enters the anti-detachment hole.

6. The scissor head structure according to claim 5, characterized in that, The anti-slip cap has an anti-slip inclined surface that contacts the axial transition member. The anti-slip inclined surface is inclined in the direction close to the anti-slip cap and toward the anti-slip axis. The axial transition piece has a contact slope that mates with the anti-detachment slope.

7. The scissor head structure according to claim 1, 2, 3, 4, or 6, characterized in that, The connecting shaft also includes a second shaft segment that mates with the second connecting hole. The second shaft segment is a flat shaft, and the shape of the second connecting hole is adapted to the second shaft segment.

8. The scissor head structure according to claim 1, 2, 3, 4, or 6, characterized in that, A planar bearing is provided between the stop cap and the first blade; The side of the stop cap corresponding to the first blade is formed with a bearing positioning groove corresponding to the planar bearing, and the planar bearing is set on the bearing positioning groove.

9. The scissor head structure according to claim 1, 2, 3, 4, or 6, characterized in that, An oil reservoir is formed on the side of the second blade corresponding to the first blade, and the oil reservoir extends towards the connecting shaft. The connecting shaft has an oil injection channel formed inside. The oil injection channel has a side connection port that communicates with the oil reservoir. The oil injection channel also has an oil injection port that extends towards the stop cap and is opened on the outside of the stop cap. The oil reservoir has at least one lubrication guide groove extending in a direction away from the connecting shaft, and the second blade has a support surface corresponding to the first blade, with the lubrication guide groove extending into the support surface.

10. An electric scissor, characterized in that, Includes a scissor head structure as described in any one of claims 1-9.

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