Rolling seat

Abstract

The utility model belongs to the technical field of heat transfer printing, and discloses a rolling seat. The reel seat comprises a reel and an elastic piece, a mounting groove is formed in the reel, the elastic piece is mounted in the mounting groove, the elastic piece comprises at least two arc-shaped parts, the at least two arc-shaped parts are distributed in the axial direction of the reel, the top ends of the arc-shaped parts protrude out of the surface of the reel, and the arc-shaped parts can deform to change the distance between the top ends of the arc-shaped parts and the surface of the reel. The elastic piece can deform so that the roll core can be inserted easily, and after the roll core is inserted, the arc-shaped part abuts against the roll core so that the roll core can be tensioned and fixed. When the roll core deforms and retracts inwards, the arc-shaped parts of the elastic pieces can also be automatically adjusted through the elastic deformation characteristic of the arc-shaped parts, moderate tensioning of the roll core is guaranteed, the situation that the roll core is clamped and cannot be pulled out is avoided, the convenience and reliability of the roll seat are improved, the at least two arc-shaped parts can jointly abut against the roll core, and therefore the roll core is prevented from being pulled out. And the contact points of the at least two arc-shaped parts and the roll core form a straight line, so that the shaft parallelism of the roll core and the winding drum is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal transfer printing, in particular to a roll base. Background Art

[0002] A thermal transfer printer is a type of printer that can print patterns, barcodes, or time information on the surface of packaging labels made of soft and thin materials or smooth cards. The thermal transfer printer includes a roll base, and a ribbon is wound around a core. Before printing starts, the ribbon needs to be installed on the thermal transfer printer, that is, the core of the ribbon needs to be inserted into the roll base, and the automatic feeding of the ribbon can be achieved through the drive of a driving member.

[0003] In order to enable the core to rotate synchronously with the roll base, the core needs to be fixed to the roll base. In the prior art, a plurality of rollers are provided on the roll base. After the core is inserted into the roll base, the core can be screwed to screw out the rollers, so that the ends of the rollers are higher than the roll base to tension the core, and thus the core is fixed on the roll base. However, the core is a plastic part, and it will be deformed and shrunk under the influence of the winding tension of the ribbon during the winding process, and then the rollers are locked, resulting in a sharp increase in the friction between the rollers and the roll base, and the rollers cannot be rotated in the reverse direction to make the ends of the rollers lower than the roll base, which also leads to the inability to pull out the core.

[0004] Therefore, a roll base is needed to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a roll base, which uses a spring piece to tightly press and fix the core. The elastic deformation characteristic of the spring piece enables it to moderately tension the core, and there will be no situation where the core is stuck and cannot be pulled out.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A roll base, comprising:

[0008] A drum, on which an installation groove is opened;

[0009] A spring piece, installed in the installation groove. The spring piece includes at least two arc-shaped parts, and at least two of the arc-shaped parts are distributed along the axial direction of the drum. The top of the arc-shaped part protrudes from the surface of the drum, and the arc-shaped part can be deformed to change the distance between its top and the surface of the drum.

[0010] Preferably, the number of the installation grooves is multiple, and the multiple installation grooves are distributed around the circumference of the drum, and the multiple spring pieces are respectively installed in the multiple installation grooves.

[0011] Preferably, the length of the installation groove is greater than the length of the spring piece.

[0012] Preferably, the winding base further includes:

[0013] A main shaft, the winding drum is rotatably sleeved on the main shaft;

[0014] A coupling, sleeved on the end of the main shaft, the coupling includes a docking part and a transmission part, the docking part can be clamped with the drive shaft of the driving part, the transmission part protrudes from the docking part, the transmission part is inserted into the winding drum, and the transmission part is a semi-cylinder.

[0015] Preferably, the number of the transmission parts is two, and the two transmission parts are symmetrically arranged.

[0016] Preferably, an elastic part is sleeved on the main shaft, the elastic part can drive the coupling to move axially along the main shaft, and a first limiting part is arranged at the end of the main shaft, and the first limiting part is configured to limit the extreme position of the coupling moving axially along the main shaft.

[0017] Preferably, the winding base further includes:

[0018] A tray, the tray is sleeved on the winding drum, and the tray can slide along the axial direction of the winding drum.

[0019] Preferably, the tray protrudes with a sliding part, and the winding drum is recessed with a sliding groove, the sliding groove extends along the axial direction of the winding drum, and the sliding part is slidably arranged in the sliding groove.

[0020] Preferably, a second limiting part is arranged at one end of the winding drum, and the second limiting part is configured to limit the extreme position of the tray sliding along the winding drum.

[0021] Preferably, the tray is recessed with an avoidance groove, and the avoidance groove is opposite to the elastic piece.

[0022] The beneficial effects of the present utility model:

[0023] This roll base includes a reel and a spring plate. An installation groove is provided on the reel, and the spring plate is installed in the installation groove. The spring plate includes at least two arc-shaped parts, and the at least two arc-shaped parts are distributed along the axial direction of the reel. The top end of the arc-shaped part protrudes from the surface of the reel, and the arc-shaped part can deform to change the distance between its top end and the surface of the reel. The top end of the arc-shaped part of the spring plate protrudes from the surface of the reel. When the core is inserted into the reel, the spring plate can deform so that the core can be easily inserted. After the core is inserted, the arc-shaped part abuts against the core to tension and fix the core, ensuring that the core can rotate synchronously with the roll base; when the core is deformed and retracted due to the ribbon winding tension, the arc-shaped part of the spring plate can also be automatically adjusted through its elastic deformation characteristics to ensure appropriate tension on the core. When the core needs to be taken out, the core can be easily pulled out, and there will be no situation where the core is stuck and cannot be pulled out, improving the convenience and reliability of the roll base. In addition, at least two arc-shaped parts can jointly abut against the core, and the contact points of the at least two arc-shaped parts and the core form a straight line to ensure the parallelism between the core and the axis of the reel. Description of the Drawings

[0024] Figure 1 is a schematic structural view of the roll base provided by the present utility model;

[0025] Figure 2 is a cross-sectional view of the roll base provided by the present utility model;

[0026] Figure 3 is a schematic structural view of the spring plate provided by the present utility model;

[0027] Figure 4 is a schematic structural view of the coupling provided by the present utility model.

[0028] In the figure:

[0029] 1. Reel; 11. Installation groove; 12. Slide groove;

[0030] 2. Spring plate; 21. Arc-shaped part;

[0031] 3. Main shaft;

[0032] 4. Coupling; 41. Docking part; 411. Card slot; 42. Transmission part;

[0033] 5. Elastic member;

[0034] 61. First limiting member; 62. Second limiting member;

[0035] 7. Tray; 71. Sliding part; 72. Avoidance groove;

[0036] 81. First bearing; 82. Second bearing. Detailed Embodiment

[0037] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0038] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the", and "on the" second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the", and "under the" second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0040] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, 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 thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0041] In order to enable the core to rotate synchronously with the base, the core needs to be fixed on the base. In the prior art, a plurality of rollers are provided on the base. After the core is inserted into the base, the core can be screwed to screw out the rollers, so that the ends of the rollers are higher than the base to tension the core, and then the core is fixed on the base. However, the core is a plastic part, and during the winding process, it will be affected by the winding tension of the ribbon and deform and shrink inward, thereby jamming the rollers, resulting in a sharp increase in the friction between the rollers and the base, and unable to rotate the rollers in the reverse direction to make the ends of the rollers lower than the base, which also leads to the inability to pull out the core.

[0042] To solve the above problems, as Figures 1 - 4As shown in the figure, this embodiment provides a reel base, which includes a reel 1 and a shrapnel 2. An installation groove 11 is formed on the reel 1, and the shrapnel 2 is installed in the installation groove 11. The shrapnel 2 includes at least two arc-shaped portions 21. The at least two arc-shaped portions 21 are distributed along the axial direction of the reel 1. The top end of the arc-shaped portion 21 protrudes from the surface of the reel 1. The arc-shaped portion 21 can be deformed to change the distance between its top end and the surface of the reel 1. The top end of the arc-shaped portion 21 of the shrapnel 2 protrudes from the surface of the reel 1. When the core is inserted into the reel 1, the shrapnel 2 can be deformed so that the core can be easily inserted. After the core is inserted, the arc-shaped portion 21 abuts against the core to tension and fix the core, ensuring that the core can rotate synchronously with the reel base; when the core is deformed and retracted due to the ribbon winding tension, the arc-shaped portion 21 of the shrapnel 2 can also be automatically adjusted through its elastic deformation characteristics to ensure appropriate tension on the core. When the core needs to be taken out, the core can be easily pulled out, and the situation where the core is stuck and cannot be pulled out will not occur, improving the convenience and reliability of the reel base. In addition, at least two arc-shaped portions 21 can jointly abut against the core, and the contact points of the at least two arc-shaped portions 21 and the core form a straight line, so as to ensure the parallelism of the core and the axis of the reel 1.

[0043] Specifically, the number of the installation grooves 11 is multiple, and the multiple installation grooves 11 are distributed around the circumference of the reel 1. Multiple shrapnels 2 are respectively installed in the multiple installation grooves 11. The multiple shrapnels 2 jointly abut against the core, and the contact points of the multiple arc-shaped portions 21 and the core form an arc, so as to ensure the coaxiality of the core and the reel 1. In this embodiment, the number of the installation grooves 11 is three, and the number of the shrapnels 2 is also three.

[0044] In this embodiment, as Figure 1 shown, the length of the installation groove 11 is greater than the length of the shrapnel 2. On the one hand, the length of the installation groove 11 being greater than that of the shrapnel 2 can provide a larger operating space for the installation of the shrapnel 2; on the other hand, it enables the shrapnel 2 to have a certain movement space in the installation groove 11. When the core retracts and causes the arc-shaped portion 21 to be pressed and deformed, the length of the shrapnel 2 will become longer, and the margin of the installation groove 11 gives the shrapnel 2 a deformation margin, so that the shrapnel 2 will not be in a tight state in the installation groove 11, reducing the risk of damage to the shrapnel 2.

[0045] Specifically, as Figure 1 、 Figure 2 、 Figure 4As shown, the reel base further includes a main shaft 3 and a coupling 4. The reel 1 is rotatably sleeved on the main shaft 3. The coupling 4 is sleeved on the end of the main shaft 3. The coupling 4 includes a docking portion 41 and a transmission portion 42. The docking portion 41 can be clamped with the drive shaft of the driving member. The transmission portion 42 protrudes from the docking portion 41. The transmission portion 42 is inserted into the reel 1. The transmission portion 42 is a semi-cylinder. By clamping the docking portion 41 of the coupling 4 with the drive shaft of the driving member and inserting the transmission portion 42 of the coupling 4 into the reel 1, when the drive shaft of the driving member rotates, it can drive the coupling 4 to rotate, and then drive the reel 1 to rotate. In the prior art, a cylindrical transmission portion 42 is usually adopted. Compared with the prior art, in this embodiment, a semi-cylindrical transmission portion 42 is adopted for torque transmission. Without affecting its positioning accuracy and the diameter of the main shaft 3, the occupied space of the transmission portion 42 in the radial direction of the reel base can be reduced, and more space can be saved.

[0046] Specifically, as Figure 4 shown, a clamping groove 411 is formed on the docking portion 41, and a convex platform protrudes from the drive shaft. The convex platform can be clamped in the clamping groove 411 so that the docking portion 41 is clamped with the drive shaft.

[0047] In this embodiment, as Figure 4 shown, the number of the transmission portions 42 is two, and the two transmission portions 42 are symmetrically arranged. The two symmetrically arranged transmission portions 42 can effectively transmit the torque of the drive shaft to the reel, ensuring the efficiency and stability of torque transmission.

[0048] Specifically, as Figure 2 shown, an elastic member 5 is sleeved on the main shaft 3. The elastic member 5 can drive the coupling 4 to move axially along the main shaft 3. A first limiting member 61 is arranged at the end of the main shaft 3. The first limiting member 61 is configured to limit the extreme position of the coupling 4 moving axially along the main shaft 3. After the coupling 4 and the drive shaft are clamped, the elastic member 5 can give the coupling 4 a driving force towards the drive shaft, ensuring that the coupling 4 can always be in a tightly clamped state with the drive shaft, which is beneficial to enhancing the stability of the clamping between the two and preventing loosening or detachment in a vibration or impact environment. The first limiting member 61 can prevent the coupling 4 from slipping out of the main shaft 3 under the drive of the elastic member 5.

[0049] Exemplarily, the first limiting member 61 is a screw. The screw is screwed into the end of the main shaft 3, and its nut can abut against the docking portion 41 of the coupling 4 to limit the extreme position of the coupling 4.

[0050] In this embodiment, the elastic member 5 is a spring, and the spring is sleeved on the main shaft 3. It should be noted that, as Figure 2As shown, a plurality of first bearings 81 are arranged between the main shaft 3 and the reel 1, and one end of one of the first bearings 81 abuts against the inner wall of the reel 1; a second bearing 82 is arranged between the coupling 4 and the reel 1, and one end of the second bearing 82 abuts against the docking portion 41; a spring is arranged between one of the first bearings 81 and the second bearing 82, and both ends of the spring abut against the first bearing 81 and the second bearing 82 respectively.

[0051] Specifically, Figure 1 , Figure 2 As shown, the reel seat further includes a tray 7, which is sleeved on the reel 1 and can slide along the axial direction of the reel 1. When the reel core needs to be pulled off the reel seat, the tray 7 is slid so that the tray 7 drives the reel core to move, thereby making the reel core come off the reel 1. By sliding the tray 7 to drive the reel core to move, the process of pulling out the reel core, which originally required a large force to complete, becomes simple and quick, greatly reducing the difficulty of operation and labor intensity, and the design of the tray 7 avoids directly applying force to the reel core or reel 1, reducing the risk of damage caused by improper operation.

[0052] In this embodiment, if Figure 1 As shown, the tray 7 is provided with a convex sliding portion 71, the reel 1 is provided with a concave sliding groove 12, the sliding groove 12 extends along the axial direction of the reel 1, and the sliding portion 71 is slidably arranged in the sliding groove 12. The cooperation between the sliding portion 71 and the sliding groove 12 ensures that the sliding of the tray 7 on the reel 1 is performed along the precise axial direction, avoiding the deviation or shaking of the tray 7 during the sliding process, and ensuring the accuracy and reliability of the operation.

[0053] In this embodiment, there are three slide grooves 12, which are arranged at intervals around the circumference of the reel 1, and there are three sliding parts 71, which are slidably arranged in the three slide grooves 12. It should be noted that the number of slide grooves 12 and sliding parts 71 is determined according to actual needs and is not limited in this embodiment.

[0054] Specifically, Figure 2 As shown, a second stopper 62 is provided at one end of the reel 1, and the second stopper 62 is configured to limit the extreme position of the tray 7 sliding along the reel 1. The second stopper 62 is provided to prevent the tray 7 from falling off the reel 1 during the sliding process.

[0055] In this embodiment, one end of the slide groove 12 passes through the end of the reel 1 away from the coupling 4, and the second limit member 62 is arranged at the end of the reel 1 away from the coupling 4. When the tray 7 is slid, the tray 7 can be limited to the extreme sliding position by the groove wall of the slide groove 12 and the second limit member 62 respectively.

[0056] Specifically, Figure 1As shown, the tray 7 is recessed with an avoidance groove 72, and the avoidance groove 72 is opposite to the elastic piece 2. The avoidance groove 72 provides an avoidance space for the elastic piece 2, so that during the sliding process of the tray 7, it will not directly contact or collide with the elastic piece 2 protruding from the reel 1, thus avoiding the damage or failure of the winding base that may be caused by mechanical conflicts.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A reel seat, characterized in that: include: A reel (1), wherein a mounting groove (11) is provided on the reel (1); A spring piece (2) is installed in the installation groove (11), the spring piece (2) comprises at least two arc-shaped portions (21), the at least two arc-shaped portions (21) are distributed along the axial direction of the reel (1), the top ends of the arc-shaped portions (21) protrude from the surface of the reel (1), and the arc-shaped portions (21) can be deformed to change the distance between the top ends thereof and the surface of the reel (1).

2. The reel stand according to claim 1, characterized in that: There are a plurality of the installation grooves (11), the plurality of the installation grooves (11) are distributed around the circumference of the reel (1), and the plurality of the spring sheets (2) are installed one by one in the plurality of the installation grooves (11).

3. The reel stand according to claim 1, characterized in that: The length of the mounting groove (11) is greater than the length of the elastic sheet (2).

4. The reel stand according to claim 1, characterized in that: The reel seat also includes: A main shaft (3), the reel (1) being rotatably sleeved on the main shaft (3); A coupling (4) is sleeved on the end of the main shaft (3), and the coupling (4) comprises a docking portion (41) and a transmission portion (42). The docking portion (41) can be engaged with the driving shaft of the driving member, and the transmission portion (42) is protruding from the docking portion (41). The transmission portion (42) is inserted into the reel (1), and the transmission portion (42) is a semi-cylinder.

5. The reel stand according to claim 4, characterized in that: The number of the transmission parts (42) is two, and the two transmission parts (42) are symmetrically arranged.

6. The reel stand according to claim 4, characterized in that: An elastic member (5) is sleeved on the main shaft (3), and the elastic member (5) is capable of driving the coupling (4) to move axially along the main shaft (3). A first limit member (61) is provided at the end of the main shaft (3), and the first limit member (61) is configured to limit the extreme position of the axial movement of the coupling (4) along the main shaft (3).

7. The reel stand according to any one of claims 1 to 6, characterized in that: The reel seat also includes: A tray (7), wherein the tray (7) is sleeved on the reel (1), and the tray (7) is capable of sliding along the axial direction of the reel (1).

8. The reel stand according to claim 7, characterized in that: The tray (7) is convexly provided with a sliding portion (71), the reel (1) is concavely provided with a sliding groove (12), the sliding groove (12) extends along the axial direction of the reel (1), and the sliding portion (71) is slidably arranged in the sliding groove (12).

9. The reel stand according to claim 7, characterized in that: A second limiting member (62) is provided at one end of the reel (1), and the second limiting member (62) is configured to limit the extreme position of the sliding of the tray (7) along the reel (1).

10. The reel stand according to claim 7, characterized in that: The tray (7) is recessed with an escape groove (72), and the escape groove (72) is directly opposite to the spring sheet (2).

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