Printer label limiting structure and printer

Abstract

The present invention provides a printer label limiting structure and a printer, including a frame shaft, a first positioning member and a second positioning member for axially limiting a label roll; the second positioning member is installed on the frame shaft through a connecting seat, the connecting seat is axially adjustable along the frame shaft, and is locked with the frame shaft through a first locking structure, the second positioning member is arranged on the connecting seat and can be switched between an erected state and a folded state, the second positioning member blocks outside the second end in the axial direction of the label roll when erected, and when folded, the label roll can be axially taken out from the frame shaft, and a holding structure for holding the second positioning member in the erected state is arranged on the frame shaft or the connecting seat. The present invention can adapt to the limiting of label rolls with different axial dimensions; and since the second positioning member can stay and fold at any position, the label roll can be replaced at any position, greatly improving the operation convenience and efficiency, and having good versatility.

Description

Technical Field

[0001] The present invention belongs to the technical field of printers, and particularly relates to a printer label limiting structure and a printer. Background Art

[0002] For a label printer, a label is usually installed on a frame in the form of a label roll, and is usually supported by a frame shaft. The label roll is coaxially sleeved on the frame shaft.

[0003] In the prior art, there are two assembly methods for the label roll and the frame shaft:

[0004] Method 1: There is an expansion structure on the frame shaft to radially press and fix the label roll shaft and the frame shaft together, and the frame shaft can rotate; its disadvantages are complex structure and high cost; the diameter of the matching label roll shaft is relatively single and cannot be compatible with label roll shafts of different diameters.

[0005] Method 2: The label roll shaft is sleeved on the frame shaft, and a limiting mechanism for restricting the axial outward movement of the label roll is provided, which can be compatible with most label roll shafts of different diameters. However, the current limiting mechanism either has an unadjustable axial position, or can only be folded when moved to the outermost end of the frame shaft, or can only be inserted from the outer end of the frame shaft. When replacing the label roll, the limiting mechanism needs to be removed first to install the label roll, which is inconvenient to operate and has a relatively complex structure. Summary of the Invention

[0006] In view of the above deficiencies of the prior art, the purpose of the present invention is to provide a printer label limiting structure, which is convenient for replacing the label roll and adapting to label rolls of different axial dimensions.

[0007] To achieve the above purpose and other related purposes, the technical solution of the present invention is as follows:

[0008] A printer label limiting structure includes

[0009] a frame shaft for supporting the label roll;

[0010] a first positioning member provided on the printer frame or the frame shaft for axially limiting the first end of the label roll;

[0011] a limiting assembly, which includes a connection seat provided on the frame shaft and a second positioning member for axially limiting the second end of the label roll. The connection seat is axially adjustable along the frame shaft and is locked with the frame shaft through a first locking structure. The second positioning member is provided on the connection seat and can be switched between an erected state and a folded state. When the second positioning member is erected, it blocks outside the second end of the label roll axially. When folded, the label roll can be axially taken out from the frame shaft, and a holding structure for holding the second positioning member in the erected state is provided on the frame shaft or the connection seat.

[0012] Optionally, the second positioning member is retracted into the frame axis in the folded state.

[0013] Optionally, the second positioning member is a telescopic structure that can be telescopically adjusted in a direction perpendicular to the frame axis, and is blocked outside the second end of the label roll when extended, and retracted into the inner diameter range of the label roll when retracted.

[0014] Optionally, a receiving groove is axially provided on the frame axis, and the connecting seat can be slidably arranged in the receiving groove along the axial direction of the frame axis. The connecting seat and the frame axis are locked by friction, or a screw rod parallel to the frame axis is passed through the connecting seat, which is axially adjusted and locked by the screw rod.

[0015] Optionally, a spring sheet is arranged between the connecting seat and the bottom of the accommodating groove, a sliding groove is axially provided on the side wall of the accommodating groove, a boss extending into the sliding groove is arranged on the connecting seat, and the elastic force of the spring sheet presses the boss and the sliding groove tightly.

[0016] Optionally, the second positioning member is rotatably connected to the connecting seat, and the retaining structure is an elastic retaining component, which retains the second positioning member in an upright state through elastic force. When the elastic force is overcome, the second positioning member can be rotated and folded.

[0017] Optionally, a second locking portion is provided on the second positioning member, and when the second positioning member is rotated to an upright state and maintained in the upright state, the second locking portion is pressed against the frame axis.

[0018] Optionally, a receiving groove is axially opened on the frame axis, the connecting seat is sunk into the receiving groove, the first end of the second positioning member is rotationally connected to the connecting seat through a spherical pair, and the second end is a free end. When the second positioning member is in a folded state, it sinks into the receiving groove.

[0019] Optionally, a ball groove is provided on the connecting seat, and the second positioning member includes a limiting rod, whose connecting end corresponding to the ball groove is a ball head, and the ball head extends into the ball groove. A limiting sleeve corresponding to the outer diameter of the limiting rod is provided above the connecting seat, and the limiting rod extends from the limiting sleeve. Openings are provided on the sides of the limiting sleeve and the connecting seat, and the width of the opening is smaller than the diameter of the limiting rod. A flat square structure corresponding to the opening is provided on the limiting rod. When the limiting rod is rotated to the point where the flat square structure corresponds to the opening, it can be erected or folded. When the limiting rod is rotated in the erected state to the point where the flat square structure is staggered with the opening, the limiting sleeve keeps the limiting rod in the erected state.

[0020] Optionally, a positioning surface for cooperating with the second end of the label roll is provided on the side surface of the second positioning member, and a limiting portion for restricting the rotation range of the second positioning member in the erected state is provided on the connecting seat or the limiting sleeve. The limiting portion has a first stopping surface and / or a second stopping surface. When the second positioning member rotates to abut against the first stopping surface, the flat-square structure corresponds to the opening and can be folded; when the second positioning member rotates to abut against the second stopping surface, the second positioning member is restricted in the erected state, and the positioning surface of the second positioning member faces the second end of the label roll.

[0021] Optionally, the second positioning member further includes a handle connected to the limiting rod, and the positioning surface is a plane provided on the side surface of the handle.

[0022] Optionally, an elastic pressing structure is provided inside the connecting seat, and a recessed portion is provided on the spherical head. When the second positioning member rotates to make the positioning surface face the second end of the label roll in the erected state, the elastic pressing structure snaps into the recessed portion, and the second positioning member can rotate in the erected state after overcoming the elastic force of the elastic pressing structure.

[0023] The present invention further provides a printer, including the printer label limiting structure described above.

[0024] As described above, the beneficial effects of the present invention are as follows: In the present invention, since the connecting seat can move axially along the label frame shaft and be locked at any position, the second positioning member can stay at any position of the label frame shaft along with the connecting seat, and the second positioning member can be switched between the erected and folded states, so that the limiting structure can adapt to the limiting of label rolls with different axial dimensions; and since the second positioning member can stay and be folded at any position, the label roll can be replaced at any position, so it is not necessary to remove or move the second positioning member and the connecting seat to the outermost end of the label frame shaft before loading or unloading the label roll, which greatly improves the operation convenience and efficiency, and has good versatility. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of an embodiment;

[0026] Figure 2 It is Figure 1 a schematic diagram of a label roll installed in

[0027] Figure 3 It is a cross-sectional view of the label frame shaft and the limiting assembly in an embodiment;

[0028] Figure 4 It is Figure 3 a cross-sectional view of the limiting assembly in

[0029] Figure 5 It is Figure 4 a partial view in

[0030] Figure 6 Schematic diagram of the second positioning member being received in the frame shaft

[0031] Figure 7 Schematic diagram of the second positioning member in the unlocked state (capable of switching between folding and standing up)

[0032] Figure 8 Corresponding to Figure 7 Position relationship diagram of the limit rod and the connecting seat in the state

[0033] Figure 9 Schematic diagram of the second positioning member rotating to the locked state

[0034] Figure 10 Corresponding to Figure 9 Position relationship diagram of the limit rod and the connecting seat in the state

[0035] Figure 11 Schematic diagram of the second locking portion being locked with the frame shaft

[0036] Description of part numbers

[0037] 1 - First positioning member; 2 - Frame shaft; 21 - Accommodating groove; 22 - Slide groove; 3 - Second positioning member; 31 - Limit rod; 32 - Handle; 33 - Ball head; 34 - Second locking portion; 35 - Flat square structure; 36 - Positioning surface; 37 - Recessed portion; 4 - Connecting seat; 41 - Boss; 42 - Ball groove; 43 - Limit sleeve; 44 - Opening; 45 - First stop surface; 46 - Second stop surface; 5 - Frame; 6 - Label roll; 7 - Elastic pressing structure; 71 - Spring; 72 - Pin; 8 - Elastic sheet Specific implementation mode

[0038] The following specific embodiments illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification

[0039] Embodiment

[0040] As Figures 1 to 4 shown, a printer label limiting structure schematically shown in this example includes a frame shaft 2, a first positioning member 1 and a second positioning member 3 for axially limiting both ends of the label roll 6. The frame shaft 2 is used to install and support the label roll 6, and the label roll 6 is coaxially sleeved outside the frame shaft 2 during installation; the first positioning member 1 is connected to the frame 5 of the printer or the first end of the frame shaft 2, blocking outside the first end of the label roll 6 and usually being fixed relative to the label roll 6

[0041] Among them, the second positioning member 3 is installed on the frame shaft 2 through the connecting seat 4. The connecting seat 4 is installed on the frame shaft 2 so as to be axially movable along the frame shaft 2, and is locked with the frame shaft 2 through the first locking structure, so that the connecting seat 4 can be locked at any axial position of the frame shaft 2. The second positioning member 3 is arranged on the connecting seat 4 and can move and adjust its position along with the connecting seat 4, so that it can stay at any position on the frame shaft 2, thus adapting to the limitation of label rolls 6 with different axial dimensions. The second positioning member 3 has two states: standing up and lying down (or folding up and laying flat). When standing up, it can block the outside of the second end of the label roll 6. When lying down, it can avoid the label roll 6, and the label roll 6 can be axially removed from or inserted into the frame shaft 2, specifically inserted into and removed from the end close to the second positioning member 3.

[0042] Among them, a holding structure (i.e., locked in this state) for holding the second positioning member 3 in the standing state is provided on the frame shaft 2 or the connecting seat 4 to prevent it from automatically falling down and causing the limitation to fail. Only when there is external intervention (such as manual operation), the second positioning member 3 switches from the standing state to the folded state of lying down.

[0043] Since the connecting seat 4 can move axially along the frame shaft 2 and be locked at any position, the second positioning member 3 can stay at any position on the frame shaft 2 along with the connecting seat 4, and the second positioning member 3 can switch between the standing state and the folded state, so that this limiting structure can adapt to the limitation of label rolls 6 with different axial dimensions. And since the second positioning member 3 can stay and fold at any position, the label roll 6 can be replaced at any position. Therefore, it is not necessary to remove or move the second positioning member 3 and the connecting seat 4 to the outermost end of the frame shaft 2 before inserting or removing the label roll 6, which greatly improves the convenience and efficiency of operation and has good versatility.

[0044] To facilitate avoiding the label roll 6, when in the folded state, the second positioning member 3 sinks into or is received into the frame shaft 2 to avoid interference with the label roll 6, and the structural layout is compact. Of course, as long as other implementation manners ensure that the second positioning member 3 is within the inner diameter range of the label roll 6 when folded.

[0045] Such as Figure 3In one embodiment, a receiving groove 21 is axially formed on the frame shaft 2. The connecting seat 4 is slidably disposed in the receiving groove 21 along the axial direction of the frame shaft 2. A spring piece 8 is disposed between the connecting seat 4 and the frame shaft 2, and is locked by the frictional force generated by the elastic force provided by the spring piece 8; alternatively, a screw rod parallel to the frame shaft 2 is passed through the connecting seat 4, and is axially adjusted and locked by the screw rod. The connecting seat 4 is sleeved on the screw rod. Rotating the screw rod enables the connecting seat 4 to axially slide along the frame shaft 2 to adjust the position, and is axially locked by thread self-locking. The example given in this example is a continuous adjustment method, and in other embodiments, it can also be divided into multiple gear adjustments. Of course, the adjustment method can also be other structures in the prior art.

[0046] Specifically, a spring piece 8 is disposed between the connecting seat 4 and the bottom of the receiving groove 21. The spring piece 8 is mounted on the connecting seat 4. A sliding groove 22 is axially formed on the side wall of the receiving groove 21. Convex platforms 41 are disposed on both sides of the connecting seat 4, and the convex platforms 41 extend into the sliding groove 22. On the one hand, it realizes guiding, and on the other hand, the elastic force of the spring piece 8 presses between the convex platforms 41 and the sliding groove 22, so as to realize the stop of the connecting seat 4 at any position on the frame shaft 2.

[0047] In one embodiment, the second positioning member 3 is rotatably connected to the connecting seat 4. This rotational connection refers to a rotational connection with a single degree of freedom. For example, it is rotatably connected through a rotating shaft. The second positioning member 3 can only rotate around the rotating shaft, and the structure is maintained as an elastic holding member. The second positioning member 3 is held in the erected state by the elastic force. When the elastic force is overcome, the second positioning member 3 can rotate and fold; a stop member can be provided to block the second positioning member 3 to make it in the erected state. The elastic holding member can be a torsion spring to keep the second positioning member 3 in the erected state all the time. After operating the second positioning member 3 to compress the torsion spring, the label roll 6 can be taken out or loaded. After releasing, the second positioning member 3 returns to the erected position through the torsion spring. The torsion spring can also be a tension spring, etc.

[0048] As Figure 5 and Figure 11 As shown, in this example, to ensure the locking effect, a second locking portion 34 is provided on the second positioning member 3. When the second positioning member 3 rotates to the erected state and is held in the erected state, that is, when the second positioning member 3 is in the limiting state, the second locking portion 34 is pressed against the frame shaft 2. On the one hand, it is locked between the connecting seat 4 and the frame shaft 2, and on the other hand, it is locked between the second positioning member 3 and the frame shaft 2. The double locking ensures the stability of the position stop.

[0049] In this example, the first end of the second positioning member 3 is rotatably connected to the connecting seat 4 through a spherical pair, with a relative rotation with multiple degrees of freedom. The second end of the second positioning member 3 is a free end and can be used for manual operation, etc. When the second positioning member 3 is in the folded state, it is received in the receiving groove 21, and the connecting seat 4 also sinks into the receiving groove 21.

[0050] like Figure 5 , Figure 8 and Figure 10 As shown, a ball groove 42 is provided on the connecting seat 4, and the second positioning member 3 includes a limit rod 31 and a handle 32 connected thereto. One end of the limit rod 31 connected to the ball groove 42 is a ball head 33 structure, and the ball head 33 extends into the ball groove 42. A limit sleeve 43 matching the outer diameter of the limit rod 31 is provided above the connecting seat 4. The limit sleeve 43 is located in the accommodating groove 21, and the diameter of the limit sleeve 43 is smaller than the diameter of the ball groove 42. The limit rod 31 extends from the limit sleeve 43, and the limit sleeve 43 limits the swing of the limit rod 31. The limit sleeve 43 and the connecting seat 4 The side surface (i.e., the outer end facing the frame axis 2) is provided with an opening 44, which is used for the limiting rod 31 to fall from the opening 44 when folded. The width of the opening 44 is smaller than the diameter of the limiting rod 31, and the limiting rod 31 is provided with a flat square structure 35 corresponding to the opening 44. Only when the limiting rod 31 is rotated to the point where the flat square structure 35 corresponds to the opening 44, can it switch between the erected and folded states. When the limiting rod 31 is rotated in the erected state to the point where the flat square structure 35 is staggered from the opening 44, the limiting sleeve 43 keeps the limiting rod 31 in the erected state. In this example, the second locking portion 34 is a pressing block provided at one end of the handle close to the connecting seat 4. When the second positioning member 3 is in the erected position, the pressing block presses on the frame axis 2 to achieve compression.

[0051] In this example, a positioning surface 36 for cooperating with the second end of the label roll 6 is provided on the side of the handle 32. The positioning surface 36 is a plane. A limiting portion for limiting the rotation range of the second positioning member 3 in the upright state is provided on the connecting seat 4 or the limiting sleeve 43. The limiting portion has a first stop surface 45 and / or a second stop surface 46. When the second positioning member 3 rotates to the flat square structure 35 abuts against the first stop surface 45, the flat square structure 35 corresponds to the opening 44, and the second positioning member 3 can be folded; when the second positioning member 3 rotates to the flat square structure 35 abuts against the second stop surface 46, it indicates that the positioning surface 36 of the second positioning member 3 is facing the second end of the label roll 6, that is, the second positioning member 3 is limited in the upright state. The first stop surface 45 and the second stop surface 46 play a stopping role on the one hand, and a prompt role of being in place on the other hand.

[0052] In this example, the limiting portion is a right-angle structure, and the two stop surfaces are perpendicular to each other, so that when the second positioning member 3 is in the upright holding state, it can be rotated up to 90° to reach the foldable position. Similarly, when it is in the position corresponding to the folded state, it can be rotated in the opposite direction up to 90° to reach the upright holding position, thereby simplifying the operation and facilitating the determination of the position of the second positioning member 3.

[0053] Figure 6 The second positioning member 3 is shown in a collapsed state, with the connecting seat 4 and the handle 32 stored in the receiving groove 21 of the label frame shaft 2, and the label roll 6 can be loaded or removed at this time;Figure 7 and Figure 8 The state where the second positioning member 3 stands upright is shown. At this time, it is not locked, and the second positioning member 3 can be switched between standing upright and falling down; as Figure 9 and Figure 10 shown, at this time, the handle 32 rotates along its own axis and locks, and at this time, the label roll 6 on the frame shaft 2 can be limited; when the label roll 6 needs to be removed, the handle 32 rotates in the reverse direction to unlock and fall down (rotate to the flat square structure 35 opposite to the opening 44), and is hidden in the frame shaft 2 again.

[0054] In one embodiment, to make the feedback more obvious when in place; an elastic pressing structure 7 is arranged in the connecting seat 4, and a recess 37 is arranged on the side surface of the ball head 33. When the second positioning member 3 rotates to the positioning surface 36 facing the second end of the label roll 6 in the standing state, the elastic pressing structure snaps into the recess 37, making the in-place feedback more obvious and facilitating the user to perceive; the recess 37 and the outer wall of the ball head 33 are smoothly transitioned, facilitating the elastic pressing structure 7 to snap in and out. Among them, when rotating the handle 32, the second positioning member 3 can rotate in the standing state after overcoming the elastic force of the elastic pressing structure 7. In this example, the elastic pressing structure 7 includes a spring 71 and a retaining pin 72, and the spring 71 presses the retaining pin 72 towards the ball head 33.

[0055] In other embodiments, the second positioning member 3 is a telescopic structure that can be telescopically adjusted in a direction perpendicular to the frame shaft 2, and blocks outside the second end of the label roll 6 when extended, and retracts within the inner diameter range of the label roll 6 when retracted; for example, it can be a telescopic rod, the telescopic rod is perpendicularly installed on the connecting seat 4 with respect to the frame shaft 2, and the standing up and folding are adjusted by telescoping. For example, a plurality of telescopic sleeves are coaxially sleeved, and the telescopic sleeves are pressed tightly by elastic clips, and can be telescoped after pressing the elastic clips; or the telescopic structure is a stud, and the stud is in threaded cooperation with the connecting seat 4, and the lifting is realized by rotating the stud.

[0056] The present invention also provides a printer, including the printer label limiting structure of any one of the above embodiments. The label roll 6 is loosely sleeved outside the frame shaft 2, the first end is positioned by the first positioning member 1, and the second end is positioned by the second positioning member 3 in the standing state.

[0057] In the present invention, since the second positioning member 3 can be erected and folded, and can move along with the connecting seat 4 to adjust its position on the frame shaft 2 and be locked; thus, it can achieve staying at any position, and can be folded and erected at this position, facilitating the second positioning member 3 to stay at any position on the axial direction of the frame shaft 2 when loading or removing the label, without having to move it to the outer end of the frame shaft 2 for operation, greatly improving the convenience; since the second positioning member 3 can adjust its position along the axial direction of the frame shaft 2, it can thus adapt to the limitation of label rolls 6 with different axial dimensions, with high versatility; and the connecting seat 4 and the frame shaft 2 are locked through the first locking structure, and the second positioning member 3 and the frame shaft 2 are pressed tightly through the second locking portion 34, achieving double locking to ensure the stability of the position stay. The setting of the limiting portion makes it have an obvious in-place reminder when the handle 32 rotates, and only needs to rotate 90° forward and backward, with convenient operation and easy to sense the position.

[0058] Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A printer label limiting structure, characterized in that: include A label frame shaft for supporting the label roll; A first positioning member is disposed on the printer frame or the label frame shaft and is used to limit the axial position of the first end of the label roll; The limiting assembly includes a connecting seat arranged on the label frame axis and a second end of the label roll for axially limiting the position. A second positioning member, wherein the axial position of the connecting seat along the frame axis is adjustable and is locked with the frame axis through a first locking structure, the second positioning member is arranged on the connecting seat and can be switched between an erected state and a folded state, the second positioning member is blocked outside the second end of the label roll in the axial direction when erected, and the label roll can be taken out from the frame axis in the axial direction when folded, and a retaining structure for retaining the second positioning member in the erected state is arranged on the frame axis or the connecting seat; The frame shaft is provided with a receiving groove along the axial direction, the connecting seat is sunk into the receiving groove, the first end of the second positioning member is rotatably connected with the connecting seat through a spherical pair, the second end is a free end, and the second positioning member is sunk into the receiving groove when in a folded state; The connecting seat is provided with a ball groove, the second positioning member includes a limiting rod, the connecting end of which corresponding to the ball groove is a ball head, the ball head extends into the ball groove, a limiting sleeve corresponding to the outer diameter of the limiting rod is provided above the connecting seat, the limiting rod extends from the limiting sleeve, the limiting sleeve and the side of the connecting seat are provided with an opening, the width of the opening is smaller than the diameter of the limiting rod, and the limiting rod is provided with a flat square structure corresponding to the opening, when the limiting rod is rotated to the flat square structure corresponding to the opening, it can be erected or folded, when the limiting rod is rotated in the erected state to the flat square structure being staggered with the opening, the limiting sleeve keeps the limiting rod in the erected state; A positioning surface for cooperating with the second end of the label roll is provided on the side of the second positioning member, and a limiting portion for limiting the rotation range of the second positioning member in the upright state is provided on the connecting seat or the limiting sleeve, and the limiting portion has a first stop surface and / or a second stop surface. When the second positioning member rotates to abut against the first stop surface, the flat square structure corresponds to the opening and can be folded; when the second positioning member rotates to abut against the second stop surface, the second positioning member is restricted in the upright state, and the positioning surface of the second positioning member faces the second end of the label roll.

2. The printer label limiting structure according to claim 1, wherein: The second positioning member is received into the frame axis when in the folded state.

3. The printer label limiting structure according to claim 1, wherein: The second positioning member is a telescopic structure that can be telescopically adjusted in a direction perpendicular to the frame axis, and is blocked outside the second end of the label roll when extended, and can be retracted into the inner diameter range of the label roll when retracted.

4. The printer label limiting structure according to claim 1, wherein: The frame shaft is provided with an accommodating groove along the axial direction, and the connecting seat can be slidably arranged in the accommodating groove along the axial direction of the frame shaft. The connecting seat and the frame shaft are locked by friction, or a screw rod parallel to the frame shaft is passed through the connecting seat, which is axially adjusted and locked by the screw rod.

5. The printer label limiting structure according to claim 4, characterized in that: A spring sheet is arranged between the connecting seat and the bottom of the receiving groove, a sliding groove is axially provided on the side wall of the receiving groove, a boss extending into the sliding groove is arranged on the connecting seat, and the elastic force of the spring sheet presses the boss and the sliding groove tightly.

6. The printer label limiting structure according to claim 1, wherein: The second positioning member is rotatably connected to the connecting seat, and the holding structure is an elastic holding member that holds the second positioning member in the erected state by elastic force. When the elastic force is overcome, the second positioning member can rotate and fold up.

7. The printer label limiting structure according to claim 1, wherein: A second locking portion is provided on the second positioning member. When the second positioning member rotates to the erected state and is held in the erected state, the second locking portion is pressed against the frame shaft.

8. The printer label limiting structure according to claim 1, wherein: The second positioning member further includes a handle connected to the limiting rod, and the positioning surface is a plane provided on the side surface of the handle.

9. The printer label limiting structure according to claim 1, wherein: An elastic tightening structure is provided in the connecting seat, and a recessed portion is provided on the spherical head. When the second positioning member rotates to the state where the positioning surface faces the second end of the label roll in the erected state, the elastic tightening structure snaps into the recessed portion, and the second positioning member can rotate in the erected state after overcoming the elastic force of the elastic tightening structure.

10. A printer, characterized in that: It includes the printer label limiting structure according to any one of claims 1-9.

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