Paper roll supporting device and printer

Abstract

The utility model relates to the technical field of printing, in particular to a paper roll supporting device and a printer, the paper roll supporting device comprises a rack, a supporting piece, a first limiting mechanism, a second limiting mechanism and a linkage piece, the supporting piece is detachably connected with the rack and used for being connected with a core cylinder of a paper roll in an inserted mode to support the paper roll; the first limiting mechanism is used for locking or unlocking the position of the supporting piece relative to the rack; the second limiting mechanism is used for locking or unlocking the position of the paper roll relative to the rack; the linkage piece is connected between the first limiting mechanism and the second limiting mechanism, the first limiting mechanism can drive the second limiting mechanism through the linkage piece to unlock the position, relative to the rack, of the paper roll, and when the paper roll needs to be taken down from the rack, the position, relative to the rack, of the supporting piece only needs to be unlocked by operating the first limiting mechanism. And when the first limiting mechanism is operated, the second limiting mechanism can be driven through the linkage piece to unlock the position of the paper roll relative to the rack, operation is easy, and the paper roll disassembling efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a paper roll supporting device and a printer. Background Art

[0002] An existing printer generally includes a paper roll supporting device and a printing device, wherein the paper roll supporting device is used to support the paper roll, and the printing device is used to print on the paper drawn out from the paper roll.

[0003] The paper roll supporting device provided by the related technology includes a frame, a supporting member, a supporting member limiting mechanism and a paper roll limiting mechanism. The supporting member is detachably connected to the frame and is used to be plugged with the core tube of the paper roll to support the paper roll. The supporting member limiting mechanism is used to lock or unlock the position of the supporting member relative to the frame. The paper roll limiting mechanism is used to lock or unlock the position of the paper roll relative to the frame. When the printer is working normally, the supporting member limiting mechanism locks the position of the supporting member relative to the frame to prevent the supporting member from driving the paper roll to separate from the frame. The paper roll limiting mechanism unlocks the position of the paper roll relative to the frame, so that the paper roll can rotate freely around its own axis relative to the frame to release the paper; when the printer stops working, the supporting member limiting mechanism locks the position of the supporting member relative to the frame and the paper roll limiting mechanism locks the position of the paper roll relative to the frame. The supporting member limiting mechanism and the paper roll limiting mechanism jointly limit the position of the paper roll relative to the frame, so that the paper roll remains stationary relative to the frame, preventing the paper roll from rotating relative to the frame or moving along its axial direction to cause damage to the printer. However, the paper roll support device provided by the related technology requires that when the printer needs to replace the paper roll, the support member limiting mechanism must be operated first to release the position lock of the support member, and then the paper roll limiting mechanism must be operated to release the position lock of the paper roll before the paper roll can be removed from the frame along with the support member, which is complicated to operate. Utility Model Content

[0004] The utility model aims to provide a paper roll supporting device and a printer, which can improve the disassembly efficiency of the paper roll under the premise of being able to limit the position of the paper roll relative to the frame and the position of the supporting member relative to the frame.

[0005] In one aspect, the utility model provides a paper roll supporting device, the paper roll supporting device comprising:

[0006] frame;

[0007] A support member, detachably connected to the frame, the support member being used to be plugged into the core tube of the paper roll to support the paper roll;

[0008] A first limiting mechanism, used for locking or unlocking the position of the support member relative to the frame;

[0009] A second limiting mechanism, used for locking or unlocking the position of the paper roll relative to the frame;

[0010] The linkage member is connected between the first limiting mechanism and the second limiting mechanism, and the first limiting mechanism can drive the second limiting mechanism through the linkage member to unlock the position of the paper roll relative to the frame.

[0011] As a preferred technical solution of the paper roll supporting device, the first limiting mechanism includes a limiting member movably connected to the frame, the limiting member is used to cooperate with or separate from the supporting member, when the limiting member cooperates with the supporting member, the limiting member prevents the supporting member from separating from the frame, when the limiting member separates from the supporting member, the supporting member can separate from the frame;

[0012] The second limiting mechanism includes a movable member movably connected to the frame, and a pressing member connected to the movable member, the movable member can move relative to the frame along a first direction and has a first position and a second position, when the movable member is located at the first position, the pressing member is configured to press the paper roll supported by the support member onto the frame, and when the movable member is located at the second position, the pressing member is configured to separate from the paper roll supported by the support member;

[0013] The linkage member is connected between the limiting member and the movable member, and the limiting member can drive the movable member to move to the second position through the linkage member.

[0014] As an optimal technical solution for the paper roll supporting device, the linkage member is slidably connected to the frame. When the limiting member is separated from the supporting member, the limiting member can rotate relative to the frame and drive the linkage member to slide relative to the frame, so that the linkage member drives the movable member to move to the second position.

[0015] As an optimal technical solution for the paper roll supporting device, the rotation axis of the limit member extends along the first direction, the linkage member is provided with a long groove extending along the second direction, the first limit mechanism also includes a driving shaft fixedly connected to the limit member, the axis of the driving shaft is parallel to the rotation axis of the limit member and is spaced apart, the driving shaft is plugged into the long groove, and when the limit member rotates, the driving shaft can drive the linkage member to move along the third direction relative to the frame, and the linkage member drives the movable member to move to the second position, and the first direction, the second direction and the third direction are perpendicular to each other.

[0016] As a preferred technical solution for the paper roll supporting device, the movable part has a first driving surface, the linkage part has a second driving surface parallel to the first driving surface, the second driving surface forms an angle with both the first direction and the third direction, when the limit member cooperates with the supporting part, the first driving surface and the second driving surface are arranged at intervals, when the limit member rotates and drives the linkage part to move along the third direction, the second driving surface can abut against the first driving surface and slide relatively to it, so as to drive the movable part to move to the second position.

[0017] As a preferred technical solution of the paper roll supporting device, the frame is provided with a guide groove extending along a third direction, the linkage member is plugged into the guide groove, and the linkage member can slide along the guide groove.

[0018] As a preferred technical solution of the paper roll support device, the frame is provided with an open slot, and the support member includes a support shaft, and the support shaft is plugged into the open slot;

[0019] The first limiting mechanism also includes a rotating shaft, the rotating shaft is fixedly connected to the frame, the first end of the limiting member is sleeved with the rotating shaft, the second end of the limiting member is provided with a limiting hole, the limiting member can move along the first direction, so that the limiting hole can be sleeved on the support shaft or separated from the support shaft along the first direction, when the limiting hole is sleeved with the support shaft, the limiting hole prevents the support shaft from being separated from the opening groove, when the limiting hole is separated from the support shaft, the support shaft can be separated from the opening groove, and the limiting member can rotate around the rotating shaft to drive the linkage member to move relative to the frame;

[0020] The first limiting mechanism further includes a first elastic member, and the first elastic member is configured to provide an elastic force to the limiting member so as to enable the limiting hole to be sleeved with the support shaft.

[0021] As a preferred technical solution of the paper roll supporting device, the second limiting mechanism further includes a motor and a transmission assembly, and the motor can drive the movable part to move to the first position or the second position through the transmission assembly.

[0022] As an optimal technical solution for the paper roll supporting device, the transmission assembly includes a worm wheel and a worm that mesh with each other, the worm wheel is rotatably arranged on the frame, the motor is transmission-connected to the worm, the movable part is provided with a first helical surface extending around the rotation axis of the worm wheel, the worm wheel is provided with a second helical surface extending around the rotation axis of the worm wheel, the second limiting mechanism also includes a second elastic part, and the second elastic part is used to make the first helical surface always abut against the second helical surface; when the worm wheel rotates forward, the second helical surface spirally descends along the first helical surface to move the movable part to the first position, and when the worm wheel rotates reversely, the second helical surface spirally ascends along the first helical surface to move the movable part to the second position.

[0023] The paper roll supporting device provided by the utility model has at least the following beneficial effects:

[0024] The paper roll support device comprises a frame, a support member, a first limiting mechanism, a second limiting mechanism and a linkage member. The support member is detachably connected to the frame, and the support member is used to be plugged with the core tube of the paper roll to support the paper roll; the first limiting mechanism is used to lock or unlock the position of the support member relative to the frame; the second limiting mechanism is used to lock or unlock the position of the paper roll relative to the frame; the linkage member is connected between the first limiting mechanism and the second limiting mechanism, and the first limiting mechanism can drive the second limiting mechanism to unlock the position of the paper roll relative to the frame through the linkage member. When the paper roll needs to be removed from the frame, the first limiting mechanism is operated to unlock the position of the support member relative to the frame, and when the first limiting mechanism is operated, the first limiting mechanism can also drive the second limiting mechanism to unlock the position of the paper roll relative to the frame through the linkage member, so that the paper roll can be removed from the frame together with the support member without operating the first limiting mechanism and the second limiting mechanism respectively, which is simple to operate and can effectively improve the efficiency of paper roll removal.

[0025] On the other hand, the utility model provides a printer, which includes a printing device and a paper roll supporting device in any of the above schemes, and the printing device is used to print on paper supported by the paper roll supporting device.

[0026] The printer provided by the utility model has at least the following beneficial effects:

[0027] The printer comprises a printing device and a paper roll supporting device in any of the above schemes, and the printing device is used to print on paper supported by the paper roll supporting device. The printer uses the above paper roll supporting device to support the paper roll, and when the paper roll needs to be removed from the frame, only the first limiting mechanism needs to be operated, and the operation is simple, convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1This is an exploded view of a printer in an embodiment of the utility model;

[0029] Figure 2 for Figure 1 Magnified view at A in the middle;

[0030] Figure 3 The partial structure of the paper roll support device in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0031] Figure 4 The exploded view of the partial structure of the paper roll support device in the embodiment of the utility model Figure 1 ;

[0032] Figure 5 The partial structure of the paper roll support device in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0033] Figure 6 The partial structure of the paper roll support device in the embodiment of the utility model is shown in FIG. Figure 3 ;

[0034] Figure 7 The exploded view of the partial structure of the paper roll support device in the embodiment of the utility model Figure 2 ;

[0035] Figure 8 The exploded view of the partial structure of the paper roll support device in the embodiment of the utility model Figure 3 ;

[0036] Fig. 9 The exploded view of the partial structure of the paper roll support device in the embodiment of the utility model Figure 4 .

[0037] In the figure:

[0038] 100, printing device; 200, paper roll supporting device; 300, paper roll;

[0039] 1. Frame; 11. Support plate; 12. Guide groove; 13. Bracket; 14. Cover; 15. Opening groove;

[0040] 2. Support member; 21. Support shaft;

[0041] 3. first limiting mechanism; 31. limiting member; 311. limiting hole; 32. driving shaft; 33. rotating shaft; 34. first elastic member; 35. blocking member;

[0042] 4. Second limiting mechanism; 41. Movable member; 411. First driving surface; 412. Detection unit; 413. First helical surface; 414. Handle; 415. Cylinder; 42. Pressing member; 421. Connecting shaft; 422. Pressing block; 43. Motor; 44. Transmission assembly; 441. Worm gear; 442. Worm; 443. Second helical surface; 45. Second elastic member; 46. Fixing member; 47. Detection member; 48. Circlip;

[0043] 5. Linkage member; 51. Long groove; 52. Avoidance groove; 53. Second driving surface. DETAILED DESCRIPTION

[0044] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] Please refer to Figure 1 This embodiment provides a printer, which includes a printing device 100 and a paper roll supporting device 200. The printing device 100 is used to print on paper supported by the paper roll supporting device 200.

[0049] Please refer to Figures 1 to 6 The paper roll support device 200 includes a frame 1, a support member 2, a first limiting mechanism 3, a second limiting mechanism 4 and a linkage member 5. The support member 2 is detachably connected to the frame 1, and the support member 2 is used to be plugged with the core tube of the paper roll 300 to support the paper roll 300; the first limiting mechanism 3 is used to lock or unlock the position of the support member 2 relative to the frame 1; the second limiting mechanism 4 is used to lock or unlock the position of the paper roll 300 relative to the frame 1; the linkage member 5 is connected between the first limiting mechanism 3 and the second limiting mechanism 4, and the first limiting mechanism 3 can drive the second limiting mechanism 4 to unlock the position of the paper roll 300 relative to the frame 1 through the linkage member 5. The paper roll supporting device 200 provided in the present embodiment can unlock the position of the supporting member 2 relative to the frame 1 by operating the first limiting mechanism 3 when the paper roll 300 needs to be removed from the frame 1. Moreover, when the first limiting mechanism 3 is operated, the first limiting mechanism 3 can also drive the second limiting mechanism 4 to unlock the position of the paper roll 300 relative to the frame 1 through the linkage member 5, so that the paper roll 300 can be removed from the frame 1 together with the supporting member 2 without operating the first limiting mechanism 3 and the second limiting mechanism 4 separately. The operation is simple and the removal efficiency of the paper roll 300 can be effectively improved.

[0050] Optionally, see Figure 2 , Figures 4 to 8 The first limiting mechanism 3 includes a limiting member 31 movably connected to the frame 1, and the limiting member 31 is used to cooperate with or separate from the support member 2. When the limiting member 31 cooperates with the support member 2, the limiting member 31 prevents the support member 2 from separating from the frame 1. When the limiting member 31 separates from the support member 2, the support member 2 can be separated from the frame 1; the second limiting mechanism 4 includes a movable member 41 movably connected to the frame 1, and a pressing member 42 connected to the movable member 41. The movable member 41 can be relative to the frame 1 along a first direction (such as Figure 2The movable member 41 moves in the direction indicated by the arrows ab in the figure to have a first position and a second position. When the movable member 41 is in the first position, the pressing member 42 is configured to press the paper roll 300 supported by the support member 2 on the frame 1. When the movable member 41 is in the second position, the pressing member 42 is configured to separate from the paper roll 300 supported by the support member 2. The linkage member 5 is connected between the limiting member 31 and the movable member 41. The limiting member 31 can drive the movable member 41 to move to the second position through the linkage member 5. Specifically, when it is necessary to remove the paper roll 300 from the frame 1, the position of the support member 2 relative to the frame 1 can be unlocked by operating the limiting member 31 so that the support member 2 can be separated from the frame 1. At the same time, by operating the limiting member 31, the movable member 41 can be driven to move to the second position through the linkage member 5, so that the pressing member 42 is separated from the paper roll 300, so that the paper roll 300 can be removed from the frame 1 along with the support member 2.

[0051] Optionally, please continue to refer to Figure 1 , Figure 2 , Figures 4 to 8 The frame 1 includes two support plates 11 that are opposite and spaced apart in a first direction, the support member 2 is supported by the two support plates 11, the paper roll 300 is placed between the two support plates 11, the pressing member 42 passes through one of the two support plates 11 and extends between the two support plates 11, and when the movable member 41 moves to the first position, the pressing member 42 is configured to press the paper roll 300 on the other of the two support plates 11. Preferably, the support member 2 includes a support shaft 21, and the support shaft 21 is plugged into the core barrel of the paper roll 300 to support the paper roll 300.

[0052] Optionally, see Figure 2 , Figure 4 and Figure 5 , the linkage member 5 is slidably connected to the frame 1. When the limit member 31 is separated from the support member 2, the limit member 31 can rotate relative to the frame 1 and drive the linkage member 5 to slide relative to the frame 1, so that the linkage member 5 drives the movable member 41 to move to the second position. In this way, when the paper roll 300 needs to be removed from the frame 1, the limit member 31 is first separated from the support member 2 to unlock the position of the support member 2 relative to the frame 1, and then the limit member 31 is rotated to drive the linkage member 5 to move. When the linkage member 5 moves, it drives the movable member 41 to move to the second position, so that the pressing member 42 is separated from the paper roll 300, so that the paper roll 300 can be removed from the frame 1. In other embodiments, the limit member 31 can also be configured to drive the linkage member 5 to move and drive the movable member 41 to move to the second position during the separation process from the support member 2.

[0053] Optionally, please continue to refer to Figure 2 , Figure 4 and Figure 5 The rotation axis of the limit member 31 extends along the first direction, and the linkage member 5 is provided with a rotation axis extending along the second direction (such as Figure 2The first limiting mechanism 3 further includes a driving shaft 32 fixedly connected to the limiting member 31, the axis of the driving shaft 32 is parallel to the rotation axis of the limiting member 31 and is spaced apart, the driving shaft 32 is plugged into the long slot 51, and when the limiting member 31 rotates, the driving shaft 32 can drive the linkage member 5 to rotate relative to the frame 1 along the third direction (such as Figure 2 The first direction, the second direction and the third direction are perpendicular to each other. In this way, the rotation axis of the limiter 31 is eccentrically arranged with the axis of the drive shaft 32, so that when the limiter 31 rotates around its rotation axis, the drive shaft 32 can push the linkage member 5 to move along the third direction while moving in the long slot 51 extending along the second direction, thereby ensuring the reliability of the movable member 41 moving to the second position. In other embodiments, the limiter 31 and the linkage member 5 can also be fixedly connected or integrally formed by fasteners, and when the linkage member 5 rotates with the limiter 31, it can abut against the movable member 41 and drive the movable member 41 to move to the second position. In other embodiments, after the limiter 31 unlocks the position of the support member 2 relative to the frame 1 or during the process of the limiter 31 unlocking the position of the support member 2 relative to the frame 1, the limiter 31 can drive the linkage member 5 to move along the first direction, and when the linkage member 5 moves along the first direction, it drives the movable member 41 to move along the first direction to the second position.

[0054] Optionally, the movable member 41 is provided with a first limiting portion, and the linkage member 5 is provided with a second limiting portion. When the limiting member 31 rotates relative to the frame 1 and drives the linkage member 5 to move along the third direction, the second limiting portion can abut against the first limiting portion to limit the rotation angle of the limiting member 31. Such a setting can cooperate with the first limiting portion and the second limiting portion to limit the rotation range of the limiting member 31, thereby preventing the limiting member 31 from being unable to reliably return to the initial state due to excessive rotation angle. Preferably, the linkage member 5 includes a linkage plate, and the linkage plate is provided with a waist-shaped avoidance groove 52. The movable member 41 includes a cylinder 415, and the avoidance groove 52 is sleeved with the cylinder 415. The first limiting portion is arranged on the outer periphery of the cylinder 415, and the second limiting portion is arranged at one end of the avoidance groove 52 along the third direction.

[0055] Optionally, please continue to refer to Figure 2 , Figure 4 and Figure 5, the movable member 41 has a first driving surface 411, and the linkage member 5 has a second driving surface 53 parallel to the first driving surface 411, and the second driving surface 53 is at an angle to both the first direction and the third direction. When the limit member 31 cooperates with the support member 2, the first driving surface 411 and the second driving surface 53 are arranged at intervals. When the limit member 31 rotates and drives the linkage member 5 to move along the third direction, the second driving surface 53 can abut against and slide relatively with the first driving surface 411 to drive the movable member 41 to move to the second position. In this way, through the cooperation of the second driving surface 53 and the first driving surface 411, the movement of the linkage member 5 along the third direction can be converted into the movement of the movable member 41 along the first direction, so that the limit member 31 drives the movable member 41 to move to the second position along the first direction through the linkage member 5; in addition, through the cooperation of the second driving surface 53 and the first driving surface 411, it can also ensure that there is a large contact area between the linkage member 5 and the movable member 41, thereby improving the reliability of the limit member 31 driving the movable member 41 to move to the second position through the linkage member 5.

[0056] Optionally, see Figure 4 The frame 1 is provided with a guide groove 12 extending along the third direction, the linkage member 5 is plugged into the guide groove 12, and the linkage member 5 can slide along the guide groove 12. Such an arrangement improves the smoothness of the movement of the linkage member 5 along the third direction. Preferably, the frame 1 includes a bracket 13 and a cover body 14 fixedly connected to the bracket 13, a receiving space is formed between the bracket 13 and the cover body 14, the movable member 41 is installed in the receiving space, and the guide groove 12 is formed between the cover body 14 and the bracket 13.

[0057] Optionally, see Figure 7The frame 1 is provided with an open slot 15, the support member 2 includes a support shaft 21, and the support shaft 21 is plugged into the open slot 15; the first limiting mechanism 3 also includes a rotating shaft 33, the rotating shaft 33 is fixedly connected to the frame 1, the first end of the limiting member 31 is sleeved with the rotating shaft 33, and the second end of the limiting member 31 is provided with a limiting hole 311, the limiting member 31 can move along the first direction so that the limiting hole 311 can be sleeved on the support shaft 21 or separated from the support shaft 21 along the first direction, when the limiting hole When the limiting hole 311 is sleeved with the support shaft 21, the limiting hole 311 prevents the support shaft 21 from being separated from the opening slot 15. When the limiting hole 311 is separated from the support shaft 21, the support shaft 21 can be separated from the opening slot 15, and the limiting member 31 can rotate around the rotating shaft 33 to drive the linkage member 5 to move relative to the frame 1. The first limiting mechanism 3 also includes a first elastic member 34, which is configured to provide the limiting member 31 with an elastic force to make the limiting hole 311 sleeved with the support shaft 21. In this way, the limiting member 31 is kept in a state of sleeved with the limiting hole 311 and the support shaft 21 under the elastic force of the first elastic member 34, thereby improving the reliability of the sleeved connection between the limiting hole 311 and the support shaft 21. When the operator pulls the limiter 31 in the first direction, the operator overcomes the elastic force of the first elastic member 34 to disengage the limiter hole 311 from the support shaft 21, and then the operator can rotate the limiter 31, so that the limiter 31 drives the linkage member 5 to drive the movable member 41 to move to the second position, and releases the position lock of the paper roll 300, so that the paper roll 300 can be removed from the frame 1. Specifically, the first limiter mechanism 3 also includes a stopper 35 connected to the second end of the rotating shaft 33, and the first elastic member 34 is sleeved on the rotating shaft 33 and located between the limiter plate and the stopper 35. The stopper 35 limits the position of the first elastic member 34, so that the first elastic member 34 is elastically deformed, and then the first elastic member 34 generates an elastic force to make the limiter hole 311 sleeved with the support shaft 21. Preferably, the limiter 31 is a plate-like structure that can be elastically deformed under the action of an external force. Preferably, the stopper 35 is a screw connected to the second end of the rotating shaft 33. Preferably, the first elastic member 34 is a compression spring.

[0058] Optionally, please continue to refer to Figure 2 , Figure 4 and Figure 6In this embodiment, the second limiting mechanism 4 further includes a motor 43 and a transmission assembly 44. The motor 43 can drive the movable member 41 to move to the first position or the second position through the transmission assembly 44. With such a configuration, the paper roll 300 can be automatically locked and unlocked through the second limiting mechanism 4. Specifically, when the paper roll support device 200 is powered on, the paper roll 300 is automatically unlocked by the second limiting mechanism 4, so that the paper roll 300 can rotate freely relative to the support member 2, so as to facilitate the paper to be transported outward from the paper roll 300; when the paper roll support device 200 is powered off, the paper roll 300 is automatically locked by the second limiting mechanism 4, so as to prevent the paper roll 300 from moving along its axial direction, so as to solve the problem of easy forgetting when manually locking or unlocking the paper roll 300.

[0059] Optionally, see Figure 6 and Figure 8 , the movable member 41 is provided with a detection part 412, and the second limiting mechanism 4 also includes a detection part 47 fixedly connected to the frame 1, and the detection part 47 is used to cooperate with the detection part 412 to detect whether the movable member 41 is located at the first position or the second position. Such an arrangement improves the accuracy of the motor 43 driving the movable member 41 to move to the first position or the second position. Exemplarily, the detection part 47 can be a photoelectric sensor, and the detection part 47 includes a light emitting end and a light receiving end that are spaced apart. When the detection part 412 is located between the light emitting end and the light receiving end, the light receiving end cannot receive the light signal emitted by the light emitting end, and the detection part 47 emits a first detection signal representing that the movable member 41 is located at the first position. When the detection part 412 is located outside the light emitting end and the light receiving end, the light receiving end receives the light signal emitted by the light emitting end, and the detection part 47 emits a second detection signal representing that the movable member 41 is located at the second position.

[0060] Optionally, please continue to refer to Figure 2 , Figure 4 and Figure 6The transmission assembly 44 includes a worm wheel 441 rotatably arranged on the frame 1, and a worm 442 meshing with the worm wheel 441, the motor 43 is connected to the worm 442 in transmission, the movable member 41 is provided with a first helical surface 413 extending around the rotation axis of the worm wheel 441, the worm wheel 441 is provided with a second helical surface 443 extending around the rotation axis of the worm wheel 441, the second limiting mechanism 4 also includes a second elastic member 45, the second elastic member 45 is used to make the first helical surface 413 always abut against the second helical surface 443; when the worm wheel 441 rotates forward, the second helical surface 443 spirally descends along the first helical surface 413 to move the movable member 41 to the first position, and when the worm wheel 441 rotates reversely, the second helical surface 443 spirally rises along the first helical surface 413 to move the movable member 41 to the second position. In this configuration, the motor 43 drives the worm 442 to rotate, and then the worm 442 drives the worm wheel 441 to rotate, and when the worm wheel 441 rotates, the second helical surface 443 and the first helical surface 413 abut against each other, so that the movable member 41 moves to the first position or the second position, which can improve the stability of the movable member 41 moving between the first position and the second position. Preferably, the second elastic member 45 is a compression spring.

[0061] Optionally, see Figure 8 The pressing member 42 includes a connecting shaft 421 and a pressing block 422. The axis of the connecting shaft 421 extends along the first direction. The first end of the connecting shaft 421 is plugged into the movable member 41. The pressing block 422 is fixedly connected to the second end of the connecting shaft 421. The worm gear 441 is sleeved with the connecting shaft 421, and along the axial direction of the connecting shaft 421, the worm gear 441 is located between the movable member 41 and the pressing block 422. In this way, when the movable member 41 moves between the first position and the second position along the first direction, the movable member 41 drives the pressing block 422 to move synchronously through the connecting shaft 421, and then presses the paper roll 300 on the frame 1 through the pressing block 422 to lock the paper roll 300; or separates the pressing block 422 from the paper roll 300 to unlock the paper roll 300. Preferably, the second limiting mechanism 4 further includes a clamping spring 48 , which is clamped with the first end of the connecting shaft 421 and is used to limit the relative position of the movable member 41 and the connecting shaft 421 along the axial direction of the connecting shaft 421 .

[0062] As an alternative, see Fig. 9The second limiting mechanism 4 also includes a fixing member 46 and a second elastic member 45. The fixing member 46 is fixedly connected to the frame 1. The movable member 41 is provided with a first helical surface 413 extending around the set axis. The fixing member 46 is provided with a second helical surface 443 extending around the set axis. The second elastic member 45 makes the second helical surface 443 always cooperate with the first helical surface 413. When the movable member 41 rotates forward, the second helical surface 443 spirally descends along the first helical surface 413, so that the movable member 41 moves to the first position along the first direction. When the movable member 41 rotates reversely, the second helical surface 443 spirally rises along the first helical surface 413, so that the movable member 41 moves to the second position along the first direction. Such a configuration enables the movable member 41 to move between the first position and the second position when the movable member 41 is rotated. Preferably, a handle 414 for the user to screw is convexly provided on the movable member 41. The movable member 41 can be moved between the first position and the second position by rotating the handle 414, which is easy to operate.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A paper roll supporting device, characterized in that: include: Rack (1); A support member (2) is detachably connected to the frame (1), and the support member (2) is used to be plugged into the core tube of the paper roll (300) to support the paper roll (300); A first limiting mechanism (3) used for locking or unlocking the position of the support member (2) relative to the frame (1); A second limiting mechanism (4) used for locking or unlocking the position of the paper roll (300) relative to the frame (1); A linkage member (5) is connected between the first limiting mechanism (3) and the second limiting mechanism (4), and the first limiting mechanism (3) can drive the second limiting mechanism (4) through the linkage member (5) to unlock the position of the paper roll (300) relative to the frame (1).

2. The paper roll supporting device according to claim 1, characterized in that: The first limiting mechanism (3) comprises a limiting member (31) movably connected to the frame (1), the limiting member (31) being used to cooperate with or separate from the support member (2); when the limiting member (31) cooperates with the support member (2), the limiting member (31) prevents the support member (2) from separating from the frame (1); when the limiting member (31) separates from the support member (2), the support member (2) can separate from the frame (1); The second limiting mechanism (4) comprises a movable member (41) movably connected to the frame (1), and a pressing member (42) connected to the movable member (41); the movable member (41) can move relative to the frame (1) along a first direction and has a first position and a second position; when the movable member (41) is located at the first position, the pressing member (42) is configured to press the paper roll (300) supported by the support member (2) onto the frame (1); when the movable member (41) is located at the second position, the pressing member (42) is configured to separate from the paper roll (300) supported by the support member (2); The linkage member (5) is connected between the limiting member (31) and the movable member (41), and the limiting member (31) can drive the movable member (41) to move to the second position through the linkage member (5).

3. The paper roll supporting device according to claim 2, characterized in that: The linkage member (5) is slidably connected to the frame (1); when the limiting member (31) is separated from the supporting member (2), the limiting member (31) can rotate relative to the frame (1) and drive the linkage member (5) to slide relative to the frame (1), so that the linkage member (5) drives the movable member (41) to move to the second position.

4. The paper roll supporting device according to claim 3, characterized in that: The rotation axis of the limiting member (31) extends along the first direction, the linkage member (5) is provided with a long slot (51) extending along the second direction, the first limiting mechanism (3) also includes a driving shaft (32) fixedly connected to the limiting member (31), the axis of the driving shaft (32) is parallel to the rotation axis of the limiting member (31) and is arranged at an interval, the driving shaft (32) is plugged into the long slot (51), when the limiting member (31) rotates, the driving shaft (32) can drive the linkage member (5) to move relative to the frame (1) along the third direction, and the linkage member (5) drives the movable member (41) to move to the second position, and the first direction, the second direction and the third direction are perpendicular to each other.

5. The paper roll supporting device according to claim 4, characterized in that: The movable member (41) has a first driving surface (411), and the linkage member (5) has a second driving surface (53) parallel to the first driving surface (411), and the second driving surface (53) forms an angle with both the first direction and the third direction. When the limiting member (31) cooperates with the supporting member (2), the first driving surface (411) and the second driving surface (53) are arranged at an interval. When the limiting member (31) rotates and drives the linkage member (5) to move along the third direction, the second driving surface (53) can abut against the first driving surface (411) and slide relatively to drive the movable member (41) to move to the second position.

6. The paper roll supporting device according to claim 4, characterized in that: The frame (1) is provided with a guide groove (12) extending along a third direction, the linkage member (5) is plugged into the guide groove (12), and the linkage member (5) can slide along the guide groove (12).

7. The paper roll supporting device according to claim 3, characterized in that: The frame (1) is provided with an open slot (15), and the support member (2) comprises a support shaft (21), and the support shaft (21) is plugged into the open slot (15); The first limiting mechanism (3) further comprises a rotating shaft (33), the rotating shaft (33) being fixedly connected to the frame (1), the first end of the limiting member (31) being sleeved with the rotating shaft (33), the second end of the limiting member (31) being provided with a limiting hole (311), the limiting member (31) being movable along the first direction so that the limiting hole (311) can be sleeved on the support shaft (21) or can be aligned with the support shaft (21) along the first direction. When the limiting hole (311) is sleeved with the support shaft (21), the limiting hole (311) prevents the support shaft (21) from being separated from the opening groove (15); when the limiting hole (311) is separated from the support shaft (21), the support shaft (21) can be separated from the opening groove (15), and the limiting member (31) can rotate around the rotating shaft (33) to drive the linkage member (5) to move relative to the frame (1); The first limiting mechanism (3) further comprises a first elastic member (34), wherein the first elastic member (34) is configured to provide an elastic force to the limiting member (31) so as to enable the limiting hole (311) to be sleeved with the support shaft (21).

8. The paper roll supporting device according to claim 2, characterized in that: The second limiting mechanism (4) further comprises a motor (43) and a transmission assembly (44); the motor (43) can drive the movable member (41) to move to the first position or the second position via the transmission assembly (44).

9. The paper roll supporting device according to claim 8, characterized in that: The transmission assembly (44) comprises a worm wheel (441) and a worm (442) meshing with each other, the worm wheel (441) being rotatably arranged on the frame (1), the motor (43) being transmission-connected to the worm (442), the movable member (41) being provided with a first helical surface (413) extending around the rotation axis of the worm wheel (441), the worm wheel (441) being provided with a second helical surface (443) extending around the rotation axis of the worm wheel (441), the second limiting mechanism (4) further comprising a second elastic member (45 ), the second elastic member (45) is used to make the first helical surface (413) always abut against the second helical surface (443); when the worm wheel (441) rotates in the forward direction, the second helical surface (443) spirally descends along the first helical surface (413) to move the movable member (41) to the first position; when the worm wheel (441) rotates in the reverse direction, the second helical surface (443) spirally ascends along the first helical surface (413) to move the movable member (41) to the second position.

10. A printer, characterized in that: It comprises a printing device (100) and a paper roll supporting device according to any one of claims 1 to 9, wherein the printing device (100) is used for printing paper supported by the paper roll supporting device.

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