Automatic locking mechanism

Abstract

The invention relates to an automatic locking mechanism which comprises an inner sleeve provided with a circumferential first lateral opening; the outer sleeve is rotatably connected to the inner sleeve in a sleeving manner and is provided with a circumferential second lateral opening, and the outer sleeve is provided with a first position where the second lateral opening is aligned with the first lateral opening and a second position where the second lateral opening is opposite to the first lateral opening; the first reset bias pressure piece applies bias pressure for resetting towards the second position to the outer sleeve; the first locking part comprises a first lock cylinder installed in the inner sleeve and a first locking piece installed on the outer sleeve, and when the outer sleeve is located at the first position and no material is placed in the inner sleeve, the first lock cylinder and the first locking piece are locked and the outer sleeve is prevented from returning to the second position; the second locking part comprises a second lock cylinder installed in the inner sleeve and linked with the first lock cylinder and a second locking piece installed on the outer sleeve, and when the outer sleeve is located at the first position and materials are placed in the inner sleeve, the second lock cylinder and the second locking piece are locked and prevent the outer sleeve from returning to the second position.

Description

Technical Field

[0001] The invention relates to a material fixing device, in particular to an automatic locking mechanism. Background Art

[0002] How to efficiently and safely add material rollers to, for example, printing devices is a research direction in the industry. It is expected that the operator can complete the fixing of the material roller with as few actions as possible. Some currently known material roller fastening mechanisms cannot automate the fastening action and require the operator to complete it manually, which undoubtedly reduces the operating efficiency of the device and is prone to safety hazards such as hand jams. Summary of the invention

[0003] The present invention aims to provide an automatic locking mechanism, which can at least solve some of the above technical problems.

[0004] According to one aspect of the present invention, an automatic locking mechanism is provided, comprising: an inner sleeve having a first lateral opening in a circumferential direction; an outer sleeve rotatably sleeved on the inner sleeve and having a second lateral opening in a circumferential direction, wherein the outer sleeve can be rotated to a first position in which the second lateral opening is aligned with the first lateral opening, and a second position in which the second lateral opening is opposite to the first lateral opening; a first reset biasing member abutting between the inner sleeve and the outer sleeve and applying a biasing force to the outer sleeve to return it to the second position; a first locking portion comprising a first lock core mounted on the inner sleeve and a first locking member mounted on the outer sleeve, wherein the first locking portion is configured such that when the outer sleeve is in the first position and no material is placed in the inner sleeve, the first lock core is locked with the first locking member and the outer sleeve is prevented from returning to the second position; a second locking portion comprising a second lock core mounted on the inner sleeve and linked to the first lock core and a second locking member mounted on the outer sleeve, wherein the second locking portion is configured such that when the outer sleeve is in the first position and material is placed in the inner sleeve, the second lock core is locked with the second locking member and the outer sleeve is prevented from returning to the second position.

[0005] According to the automatic locking mechanism provided by this solution, the operator basically only needs to manually adjust the rotation angle of the outer sleeve so that the lateral opening of the outer sleeve is aligned with the lateral opening of the inner sleeve, and the material can be automatically locked after the material is put in. The locking process does not require human intervention, which can effectively improve the efficiency and safety of feeding.

[0006] In some embodiments, the inner sleeve is provided with a rotatable connecting rod, and the connecting rod has long grooves extending along the length direction of the connecting rod on opposite sides of the rotation axis. The first lock core and the second lock core are rotatably arranged in the corresponding long grooves and can move along the long grooves.

[0007] In some embodiments, the connecting rod has a first posture and a second posture, wherein: in the first posture, the first lock core is close to the circumferential edge of the inner sleeve and the second lock core is close to the interior of the inner sleeve, and the first lock core can be locked with the first locking member; in the second posture, the first lock core is close to the interior of the inner sleeve and the second lock core is close to the circumferential edge of the inner sleeve, and the second lock core can be locked with the second locking member; a second reset biasing member is connected between the inner sleeve and the connecting rod, and the second reset biasing member applies a biasing force to the connecting rod to return it to the first posture.

[0008] In some embodiments, the inner sleeve is provided with a limit rod, and the limit rod is arranged to limit the rotation angle of the connecting rod when returning to the first posture.

[0009] In some embodiments, the inner sleeve is formed with a circumferential groove opposite to the first lateral opening, and the outer sleeve is provided with a limiting member, which is embedded in the circumferential groove and can move along the circumferential groove.

[0010] In some embodiments, the inner sleeve has two parallel and radially spaced sliding grooves extending transversely to its central axis, and the first lock core and the second lock core are respectively arranged in the corresponding sliding grooves and can move along the sliding grooves.

[0011] In some embodiments, the first locking member is fixedly mounted on the outer sleeve transversely to the rotation axis of the outer sleeve, the first lock core has a first stop surface facing away from the second lock core, the first locking member can rest on the first stop surface and form a lock between the first locking member and the first lock core.

[0012] In some embodiments, the second locking member is movable in a direction transverse to the rotation axis of the outer sleeve, and the second lock core has a second stop surface facing the first lock core. The second locking member can be driven by the second lock core to move in a direction away from the inner sleeve, and can move in a direction close to the inner sleeve and rest on the second stop surface when crossing the second lock core to form a lock between the second locking member and the second lock core.

[0013] In some embodiments, the outer sleeve is fixedly mounted with a sleeve transverse to the rotation axis of the outer sleeve, and a third reset biasing member is provided in the sleeve, the third reset biasing member abuts between the second locking member and the sleeve, and applies a biasing force to the second locking member to make it close to the inner sleeve.

[0014] In some embodiments, the first lock core has a first stop surface facing away from the second lock core, the second lock core has a second stop surface facing the first lock core, the first locking member has a first engaging surface that can be abutted against the first stop surface, and the second locking member has a second engaging surface that can be abutted against the second stop surface, wherein the distance between the first stop surface and the second stop surface is smaller than the distance between the first engaging surface and the second engaging surface.

[0015] Some of the other features and advantages of the present invention will be apparent to those skilled in the art after reading this application, and the other parts will be described in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0017] Figure 1 is a schematic diagram of an angle of the automatic locking mechanism according to an embodiment of the present invention, wherein the lateral opening of the inner sleeve and the lateral opening of the outer sleeve face away from each other;

[0018] Figure 2 yes Figure 1 A schematic diagram of the automatic locking mechanism from another angle;

[0019] Figure 3 is a schematic diagram of an angle of an automatic locking mechanism according to an embodiment of the present invention, wherein the lateral opening of the inner sleeve is aligned with the lateral opening of the outer sleeve;

[0020] Figure 4 yes Figure 3 A schematic diagram of the automatic locking mechanism from another angle;

[0021] Figure 5 is an exploded schematic diagram of an automatic locking mechanism according to an embodiment of the present invention;

[0022] Figure 6 is a schematic diagram of an angle of a cover of an automatic locking mechanism according to an embodiment of the present invention;

[0023] Figure 7 yes Figure 6 A schematic diagram of the coat from another angle;

[0024] Figure 8 is a schematic diagram of an inner sleeve of an automatic locking mechanism according to an embodiment of the present invention at an angle;

[0025] Fig. 9 yes Figure 8 A schematic diagram of the inner sleeve from another angle;

[0026] Fig.10is a schematic diagram of a connecting rod of an automatic locking mechanism according to an embodiment of the present invention in a first posture;

[0027] Fig.11 is a schematic diagram of a connecting rod of an automatic locking mechanism according to an embodiment of the present invention in a second posture;

[0028] Fig.12 Schematic diagram of the positional relationship between the first locking portion and the second locking portion in the automatic locking mechanism according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1-automatic locking mechanism; 2-outer sleeve; 22-groove; 23-accommodating groove; 25-end wall; 251-accommodating opening; 26-lateral opening of outer sleeve; 27-hole; 28-hole; 29-hole; 3-stopper; 31-mounting member; 4-inner sleeve; 41-first section; 42-accommodating groove; 43-second section; 431-lateral opening of inner sleeve; 432-accommodating space; 433-slide groove; 434-slide groove; 44-circumferential groove; 5-reset biasing member; 6-first locking portion; 61-first lock core; 6 11-side surface; 612-stop surface; 62-shaft; 63-first locking member; 630-joining surface; 7-second locking portion; 71-second lock core; 711-side surface; 712-stop surface; 72-shaft; 73-second locking member; 730-joining surface; 74-cylinder; 75-fixing member; 76-reset biasing member; 8-connecting rod; 81-shaft; 82-reset biasing member; 83-limiting rod; 84-shaft; 85-long groove; 86-long groove; 8a-first part; 8b-second part; 9-limiting member DETAILED DESCRIPTION

[0031] Now, with reference to the accompanying drawings, a schematic scheme of the automatic locking mechanism disclosed in the present invention is described in detail. Although the accompanying drawings are provided to present some embodiments of the present invention, the accompanying drawings do not have to be drawn according to the dimensions of the specific embodiments, and certain features may be enlarged, removed or partially cut to better illustrate and explain the disclosure of the present invention. Some components in the accompanying drawings can be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the accompanying drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0032] Certain directional terms used to describe the drawings below, such as "inside", "outside", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.

[0033] The terms "first", "first", "second", "second" and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0034] Figures 1 to 5 The automatic locking mechanism 1 of the present invention is shown as an example. As shown in the figure, the automatic locking mechanism 1 includes an outer sleeve 2 and an inner sleeve 4, and also includes a reset biasing member 5, a first locking portion 6 and a second locking portion 7 connected between the outer sleeve 2 and the inner sleeve 4, wherein the cylindrical inner sleeve 4 having a central axis is fixed, for example, fixed to a frame, and the outer sleeve 2 is sleeved on the inner sleeve 4 and can rotate around the central axis of the inner sleeve 4. Here, the central axes of the inner sleeve 4 and the outer sleeve 4 can be coincident.

[0035] Combined with reference Figure 6 and Figure 7 The outer sleeve 2 has an axially extending inner hole, which is completely open at the first end of the outer sleeve 2 to allow the inner sleeve 4 to be axially assembled into the outer sleeve 2. The outer sleeve 2 is provided with an end wall 25 at the second end axially opposite to the first end, and the end wall 25 partially covers the inner hole of the outer sleeve 2 and defines a receiving port 251 communicating with the inner hole for placing materials. A lateral opening 26 leading to the inner hole and the receiving port 251 is formed on the circumferential wall of the outer sleeve 2.

[0036] Combined with reference Figure 8 and Fig. 9 The inner sleeve 4 includes a first section 41 in a truncated cone shape and a second section 43 connected to the first section 41 and having an axial inner hole, wherein the second section 43 has a lateral opening 431 leading to the inner hole formed on the circumferential wall. When the outer sleeve 2 rotates relative to the inner sleeve 4 around the central axis, the lateral opening 26 of the outer sleeve 2 can be aligned with the lateral opening 431 of the inner sleeve 4, as shown in FIG. Figure 3 and Figure 4 As shown, the material is allowed to fall into the inner holes of the outer sleeve 2 and the inner sleeve 4 through the two lateral openings 26 and 431. At this time, the outer sleeve 2 is in the first position.

[0037] The outer sleeve 2 can rotate relative to the inner sleeve 4 around the central axis to make the lateral opening 26 staggered with the lateral opening 431 of the inner sleeve 4. At this time, the outer sleeve 2 is in the second position, and the outer sleeve 2 and the inner sleeve 4 can clamp the material. Figure 1 and Figure 2 In one embodiment, when the outer sleeve 2 is in the second position, the lateral opening 26 and the lateral opening 431 are offset to be opposite to each other relative to the central axis of the inner sleeve 4 .

[0038] A circumferential groove 44 is formed on the circumferential wall of the inner sleeve 4 adjacent to the lateral opening 431. The circumferential groove 44 extends along the circumferential direction of the inner sleeve 4 and is opposite to the lateral opening 431. The outer sleeve 2 is provided with a hole 27 on the circumferential wall. The hole 27 extends along the radial direction of the outer sleeve 2. The stopper 9 is fixedly installed in the hole 27 and extends from the hole 27 to be inserted into the circumferential groove 44. When the outer sleeve 2 rotates around the central axis relative to the inner sleeve 4, the stopper 9 can rotate synchronously along the circumferential groove 44. The extension length of the circumferential groove 44 defines the rotation angle of the outer sleeve 2.

[0039] A reset biasing member 5 is connected between the inner sleeve 4 and the outer sleeve 2. When the outer sleeve 2 is in the second position, the reset biasing member 5 is in a natural state. During the rotation of the outer sleeve 2 from the second position to the first position, the reset biasing member 5 is deformed and begins to store energy until the outer sleeve 2 is in the first position, when the reset biasing member 5 is tensioned. In one embodiment, there is a gap between the inner circumferential wall of the outer sleeve 2 and the outer circumferential wall of the inner sleeve 4, and the reset biasing member 5 is a torsion spring sleeved on the inner sleeve 4 and located in the gap between the outer sleeve 2 and the inner sleeve 4, wherein one leg of the torsion spring is inserted into the outer sleeve 2, for example, into the receiving groove 23 on the first end face of the outer sleeve 2, and the other leg of the torsion spring is inserted into the inner sleeve 4, for example, into the receiving groove 42 on the end face of the first section 41 of the inner sleeve 4. During the rotation of the outer sleeve 2 from the second position to the first position, the torsion spring always applies a reset biasing force to the outer sleeve 4 to return to the second position due to deformation.

[0040] In order to prevent the reset biasing member 5 from accidentally coming out of the inner sleeve 4 and the outer sleeve 2, a stop structure may be provided for the reset biasing member 5. In the illustrated embodiment, a plurality of grooves 22 are formed on the first end surface of the outer sleeve 2, and the grooves 22 are arranged at intervals along the circumferential direction of the outer sleeve 2. Each groove 22 is provided with a stopper 3 that can be embedded in the groove 22, such as a stopper sheet having a length that can cover the gap between the outer sleeve 2 and the inner sleeve 4. The stopper 3 can be fixed in the groove 22 by a mounting member 31 such as a screw or a bolt, and prevents the reset biasing member 5 from coming out of the gap between the inner sleeve 4 and the outer sleeve 2.

[0041] As mentioned above, when the outer sleeve 2 rotates to the first position, the lateral opening 26 of the outer sleeve 2 is aligned with the lateral opening 431 of the inner sleeve 4, and materials can be added to the automatic locking mechanism 1. At the same time, the reset biasing member 5 is also in a tensioned state and applies a biasing force to the outer sleeve 2 to return it to the second position. In order to keep the outer sleeve 2 in the first position without manual force to allow the material to be smoothly inserted, a first locking portion 6 and a second locking portion 7 are provided between the outer sleeve 2 and the inner sleeve 4, which perform locking functions in different time periods, which will be described in detail later.

[0042] like Figure 5 , Fig.10 and Fig.11As shown, the first lock core 61 of the first locking part 6 is movably mounted on the inner sleeve 4, and the first locking member 63 of the first locking part 6 is fixedly mounted on the outer sleeve 2. The outer sleeve 2 is formed with a hole 28 extending perpendicularly to the central axis, and the hole 28 is spaced from the central axis of the outer sleeve 2. The first locking member 63 is installed in the hole 28 and extends from the hole 28. The inner sleeve 4 is formed with a slide groove 433 extending perpendicularly to the central axis, and the slide groove 433 is spaced from the central axis of the inner sleeve 4. The first lock core 61 is embedded in the slide groove 433 and can move along the slide groove 433. The first lock core 61 can be moved to lock with the first locking member 63 to overcome the reset biasing force of the reset biasing member 5 to keep the outer sleeve 2 in the first position for a desired period of time. The first lock core 61 can also be moved to unlock with the first locking member 63 to allow the reset biasing member 5 to drive the outer sleeve 2 to rotate to the second position.

[0043] Or Figure 5 , Fig.10 and Fig.11 As shown, the second locking member 73 of the second locking part 7 is mounted on the outer sleeve 2 and can move relative to the outer sleeve 2, while the second lock core 71 of the second locking part 7 is movably mounted on the inner sleeve 4. The outer sleeve 2 is formed with a hole 29 extending perpendicularly to the central axis, and the hole 29 is spaced from the central axis of the outer sleeve 2. The hole 29 of the outer sleeve 2 is parallel to and spaced from the hole 28. In order to realize the movement of the second locking member 73 relative to the outer sleeve 2, an actuating mechanism can be provided for it. In the embodiment shown, the sleeve is fixedly mounted in the hole 29 of the outer sleeve 2, and a reset biasing member 76, such as a spring, is provided in the sleeve. When the second locking member 73 is pressed by an external force and shrinks into the sleeve, the reset biasing member 76 deforms and stores energy. When the external force acting on the second locking member 73 disappears, the reset biasing member 76 drives the second locking member 73 to extend from the sleeve. The sleeve can be an integral structure or a split structure. For example, the sleeve can be split into a cylinder 74 and a fixing member 75 inserted into one end of the cylinder 74. The reset biasing member 76 is pressed between the fixing member 75 and the second locking member 73. The inner sleeve 4 is formed with a slide groove 434 extending perpendicularly to the central axis, and the slide groove 434 is spaced from the central axis of the inner sleeve 4. The slide groove 434 of the inner sleeve 4 is parallel to and spaced from the slide groove 433. The second lock core 71 is embedded in the slide groove 434 and can move along the slide groove 434. The second lock core 71 can be moved to lock with the second locking member 73 to overcome the reset biasing force of the reset biasing member 5 to keep the outer sleeve 2 in the first position for a desired period of time. The second lock core 71 can also be moved to unlock with the second locking member 73 to allow the reset biasing member 5 to drive the outer sleeve 2 to rotate to the second position.

[0044] The first locking part 6 and the second locking part 7 play a locking function on the inner sleeve 4 and the outer sleeve 2 in completely staggered time periods. In order to ensure the linkage of the first locking part 6 and the second locking part 7, a connecting rod 8 can be connected between them. The connecting rod 8 is installed in the receiving space 432 of the inner sleeve 4 through the shaft 81 fixed to the inner sleeve 4, and can rotate around the shaft 81. The receiving space 432 is connected to the slide groove 433 and the slide groove 434 respectively. Fig.10 As shown, with the rotation axis of the connecting rod 8 as the boundary, the portion between the first end of the connecting rod 8 and the rotation axis is identified as the first portion 8a, and the portion between the second end of the connecting rod 8 and the rotation axis is identified as the second portion 8b. The connecting rod 8 is formed with a long groove 85 in the first portion 8a, and a long groove 86 in the second portion 8b. Both long grooves 85 and 86 extend along the length direction of the connecting rod 8. The shaft 62 passes through the long groove 85 and can slide along the long groove 85, and the shaft 62 is connected to the first lock core 61. The shaft 72 passes through the long groove 86 and can slide along the long groove 86, and the shaft 72 is connected to the second lock core 71. Thereby, the first lock core 61 can move along the long groove 85 of the connecting rod 8 in addition to moving along the slide groove 433 of the inner sleeve 4, and the second lock core 71 can move along the long groove 86 of the connecting rod 8 in addition to moving along the inner sleeve 434.

[0045] As the connecting rod 8 rotates around the axis 81, the first lock core 61 can be relatively closer to the circumferential edge of the inner sleeve 4, while the second lock core 71 can be relatively closer to the interior of the inner sleeve 4. Fig.10 As shown, the connecting rod 8 is in the first posture at this time. The rotation of the connecting rod 8 around the axis 81 can also make the first lock core 61 relatively closer to the inside of the inner sleeve 4, and the second lock core 71 relatively closer to the circumference of the inner sleeve 4, as shown in FIG. Fig.11 As shown, at this time, the connecting rod 8 is in the second posture. A reset biasing member 82 is connected between the connecting rod 8 and the inner sleeve 4, and the function of the reset biasing member 82 is to drive the connecting rod 8 to return to the first posture. When the connecting rod 8 is in the first posture, the reset biasing member 82 is in a natural state. During the rotation of the connecting rod 8 from the first posture to the second posture, the reset biasing member 82 is deformed and stores energy, and always applies a biasing force to the connecting rod 8 to return to the first posture. Until the connecting rod 8 reaches the second posture, the reset biasing member 82 is tensioned. In one embodiment, the reset biasing member 82 is a tension spring, one end of which is connected to the second part 8b of the connecting rod 8, and the other end is connected to the shaft 84 fixed to the inner sleeve 4. A limit rod 83 is also provided on the side of the connecting rod 8 to limit the rotation angle of the connecting rod 8, especially the rotation angle for resetting to the first posture.

[0046] The positional relationship between the first locking portion 6 and the second locking portion 7 is specially designed so that when the first lock core 61 is locked with the first locking member 63, the second lock core 71 is staggered from the position locked with the second locking member 73, and when the second lock core 71 is locked with the second locking member 73, the first lock core 61 is also separated from the first locking member 63. Fig.12 , the surface of the first lock core 61 that can block the first locking member 63 is marked as the stop surface 612, and the surface of the first locking member 63 that can be pressed against the first lock core 61 is marked as the engagement surface 630. At the same time, the surface of the second lock core 71 that can block the second locking member 73 is marked as the stop surface 712, and the surface of the second locking member 73 that can be pressed against the second lock core 71 is marked as the engagement surface 730. The distance L1 between the stop surface 612 and the stop surface 712 is smaller than the distance L2 between the engagement surface 630 and the engagement surface 730. In this way, when the engagement surface 630 of the first locking member 63 presses the stop surface 612 of the first lock core 61 so that the first lock core 61 is locked with the first locking member 63, the second locking member 73 has not yet reached a position where it can be locked with the second lock core 71. Similarly, when the second locking member 73 reaches the point where it can press the stop surface 712 of the second lock core 71 with the engaging surface 730 so that the second lock core 71 is locked with the second locking member 73 , the engaging surface 630 of the first locking member 63 has been separated from the stop surface 612 of the first lock core 61 .

[0047] The working principle of the automatic locking mechanism 1 provided by the present invention is described in detail below with reference to the accompanying drawings.

[0048] I. Initial stage

[0049] In the initial stage, there is no material in the automatic locking mechanism 1. The outer sleeve 2 is in the second position under the action of the reset biasing member 5, and the lateral opening 26 of the outer sleeve 2 and the lateral opening 431 of the inner sleeve 4 are facing away from each other. Figure 1 and Figure 2 The outer sleeve 2 and the inner sleeve 4 are provided with a space for fixing materials later.

[0050] Since there is no material, the connecting rod 8 is in the first posture under the action of the reset biasing member 82. Fig.10 At this time, the first lock core 61 is relatively closer to the circumferential edge of the inner sleeve 4 , while the second lock core 71 is relatively closer to the interior of the inner sleeve 4 .

[0051] II. Add Materials

[0052] In the initial state, the manual Figure 1 The first direction A shown rotates the outer sleeve 2 from the second position to the first position, so that the lateral opening 26 of the outer sleeve 2 is aligned with the lateral opening 431 of the inner sleeve 4. As the outer sleeve 2 rotates along the first direction A, the first locking member 63 first passes the second lock core 71. At this time, since the connecting rod 8 is still in the first posture, the second lock core 71 will not block the first locking member 63. After the first locking member 63 passes over the second lock core 71, the second locking member 73 approaches the second lock core 71. Similarly, the second lock core 71 will not block the second locking member 73.

[0053] Next, as the outer sleeve 2 continues to rotate toward the first position along the first direction A, the first locking member 63 approaches the first lock core 61. At this time, the connecting rod 8 is still in the first posture. At this stage, the end face of the first locking member 63 is inclined relative to the side face 611 of the first lock core 61, so the first lock core 61 will not block the first locking member 63 from rotating along the first direction A. When the first locking member 63 rotates over the first lock core 61 and the second locking member 63 has not yet reached a position where it can form a lock with the second lock core 71, the lateral opening 26 of the outer sleeve 2 is aligned with the lateral opening 431 of the inner sleeve 4, and the outer sleeve 2 can stop rotating along the first direction A.

[0054] After releasing the hand, the outer cover 2 has a tendency to rotate back to the second position along the second direction B opposite to the first direction A under the driving of the reset biasing member 5, but this tendency is blocked by the first lock core 61. After the first locking member 63 passes over the first lock core 61, the engaging surface 630 of the first locking member 63 can be abutted against the stop surface 612 of the first lock core 61. That is, the first lock core 61 is locked with the first locking member 63. In this way, the outer cover 2 cannot rotate back along the second direction B and remains in the first position.

[0055] Materials can be placed in the automatic locking mechanism 1. Sufficient weight of the materials will drive the connecting rod 8 to enter the second posture. At this time, the first lock core 61 is driven to move along the slide groove 433 toward the inside of the inner sleeve 4, and the second lock core 71 is driven to move along the slide groove 434 toward the circumferential edge of the inner sleeve 4. Thereby, the first lock core 61 is unlocked from the first locking member 63. Since the second lock core 71 has not yet reached the position where it can be locked with the second locking member 73, the outer sleeve 2 can automatically rotate back to the second position along the second direction B under the drive of the reset biasing member 5.

[0056] III. Replacement of materials

[0057] When the outer sleeve 2 is in the second position and the material is stored in the automatic locking sleeve 1, refer to Fig.11 , the connecting rod 8 is in the second posture. At this time, the first lock core 61 is relatively closer to the inside of the inner sleeve 4, and the second lock core 71 is relatively closer to the circumferential edge of the inner sleeve 4.

[0058] When the material is to be replaced, the outer sleeve 2 is manually rotated from the second position to the first position along the first direction A, so that the lateral opening 26 of the outer sleeve 2 is aligned with the lateral opening 431 of the inner sleeve 4. As the outer sleeve 2 rotates along the first direction A, the first locking member 63 first passes through the second lock core 71. The outer side surface 711 of the second lock core 71 is an inclined surface, so it will not prevent the first locking member 63 from passing over the second lock core 71 and approaching the first lock core 61.

[0059] After the first locking member 63 passes over the second lock core 71, the second locking member 73 approaches the second lock core 71 and abuts against the inclined side surface 711 of the second lock core 71. As the rotation continues along the first direction A, the inclined side surface 711 pushes the second locking member 73 away from the inner sleeve 4. Until the second locking member 73 passes over the second lock core 71, the second locking member 73 can be reset close to the inner sleeve 4 under the drive of the reset biasing member 76. At this time, the lateral opening 26 of the outer sleeve 2 is aligned with the lateral opening 431 of the inner sleeve 4, and the outer sleeve 2 can stop rotating along the first direction A.

[0060] After releasing the hand, the outer cover 2 has a tendency to rotate back to the second position along the second direction B driven by the reset biasing member 5, but this tendency is blocked by the second lock core 71. After the second locking member 73 passes over the second lock core 71, the engagement surface 730 of the reset second locking member 73 can be abutted against the stop surface 712 of the second lock core 71. That is, the second lock core 71 is locked with the second locking member 73. In this way, the outer cover 2 cannot rotate and reset along the second direction B, and remains in the first position. The material can be taken out from the automatic locking mechanism.

[0061] When the material is taken out of the automatic locking mechanism 1 and no new material is placed, the reset biasing member 82 can pull the connecting rod 8 to rotate toward the first posture, so that the second lock core 71 moves close to the interior of the inner sleeve 4 and is unlocked with the second locking member 73, while the first lock core 61 moves close to the circumferential edge of the inner sleeve 4 and can be locked with the first locking member 63 again. According to the special positional relationship between the first locking portion 6 and the second locking portion 7 mentioned above, after the second lock core 71 is unlocked with the second locking member 73, the first locking member 63 needs to fall back a short distance along the second direction B before it can be locked with the first lock core 61 again. This falling distance is not enough to make the lateral opening 26 of the outer sleeve 2 staggered with the lateral opening 431 of the inner sleeve 4 and affect the placement of new materials, but it can make the second locking member 73 rotate along the second direction B to a position staggered with the stop surface 712 of the second lock core 71.

[0062] Afterwards, new material is put into the automatic locking mechanism 1 to push the connecting rod 8 into the second posture, thereby unlocking the first lock core 61 and the first locking member 63. Since the second lock core 71 has not yet reached the position where it can be locked with the second locking member 73, the outer sleeve 2 can automatically rotate back to the second position along the second direction B under the drive of the reset biasing member 5.

[0063] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0064] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An automatic locking mechanism, characterized in that: include: An inner sleeve having a first lateral opening in a circumferential direction; an outer sleeve rotatably sleeved on the inner sleeve and having a second lateral opening in a circumferential direction, wherein the outer sleeve can be rotated to a first position where the second lateral opening is aligned with the first lateral opening and a second position where the second lateral opening is facing away from the first lateral opening; a first reset biasing member abutting between the inner sleeve and the outer sleeve and applying a biasing force to the outer sleeve to return it to the second position; A first locking portion, comprising a first lock core installed on the inner sleeve and a first locking member installed on the outer sleeve, wherein the first locking portion is configured such that when the outer sleeve is in the first position and no material is placed in the inner sleeve, the first lock core is locked with the first locking member and prevents the outer sleeve from returning to the second position; The second locking part includes a second lock core installed on the inner sleeve and linked to the first lock core, and a second locking member installed on the outer sleeve, wherein the second locking part is configured to lock the second lock core with the second locking member and prevent the outer sleeve from returning to the second position when the outer sleeve is in the first position and material is placed in the inner sleeve.

2. The automatic locking mechanism according to claim 1, characterized in that: The inner sleeve is provided with a rotatable connecting rod, and the connecting rod is respectively provided with long grooves extending along the length direction of the connecting rod on opposite sides of the rotation axis. The first lock core and the second lock core are rotatably arranged in the corresponding long grooves and can move along the long grooves.

3. The automatic locking mechanism according to claim 2, characterized in that: The connecting rod has a first posture and a second posture, wherein: In the first posture, the first lock core is close to the circumferential edge of the inner sleeve and the second lock core is close to the interior of the inner sleeve, and the first lock core can be locked with the first locking member; In the second posture, the first lock core is close to the interior of the inner sleeve and the second lock core is close to the circumferential edge of the inner sleeve, and the second lock core can be locked with the second locking member; A second reset biasing member is connected between the inner sleeve and the connecting rod, and the second reset biasing member applies a biasing force to the connecting rod to return it to the first posture.

4. The automatic locking mechanism according to claim 3, characterized in that: The inner sleeve is provided with a limiting rod, and the limiting rod is arranged to limit the rotation angle of the connecting rod when returning to the first posture.

5. The automatic locking mechanism according to claim 1, characterized in that: The inner sleeve is formed with a circumferential groove opposite to the first lateral opening, and the outer sleeve is provided with a limiting member, which is embedded in the circumferential groove and can move along the circumferential groove.

6. The automatic locking mechanism according to claim 1, characterized in that: The inner sleeve has two parallel and radially spaced sliding grooves extending transversely to the central axis thereof, and the first lock core and the second lock core are respectively arranged in the corresponding sliding grooves and can move along the sliding grooves.

7. The automatic locking mechanism according to claim 1, characterized in that: The first locking member is installed on the outer sleeve transversely to the rotation axis of the outer sleeve, and the first lock core has a first stop surface facing away from the second lock core. The first locking member can rest on the first stop surface to form a lock between the first locking member and the first lock core.

8. The automatic locking mechanism according to claim 1, characterized in that: The second locking member is movable in a direction transverse to the rotation axis of the outer sleeve, and the second lock core has a second stop surface facing the first lock core. The second locking member can be driven by the second lock core to move in a direction away from the inner sleeve, and can move in a direction close to the inner sleeve and rest on the second stop surface when crossing the second lock core, so as to form a lock between the second locking member and the second lock core.

9. The automatic locking mechanism according to claim 1, characterized in that: The outer sleeve is fixedly mounted with a sleeve transverse to the rotation axis of the outer sleeve, and a third reset biasing member is arranged in the sleeve. The third reset biasing member abuts between the second locking member and the sleeve and applies a biasing force to the second locking member to make it close to the inner sleeve.

10. The automatic locking mechanism according to claim 1, characterized in that: The first lock core has a first stop surface facing away from the second lock core, the second lock core has a second stop surface facing the first lock core, the first locking member has a first joint surface that can be abutted against the first stop surface, and the second locking member has a second joint surface that can be abutted against the second stop surface, wherein the distance between the first stop surface and the second stop surface is smaller than the distance between the first joint surface and the second joint surface.

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