Label printer

Abstract

A thermal transfer ribbon box comprises a base and a limiting seat connected to the base, a limiting assembly is arranged in a containing cavity of a printer body, and an elastic piece is arranged in the containing cavity and connected to one of the thermal transfer ribbon box and the printer body. The limiting assembly has a limiting state and a releasing state, in the limiting state, the limiting assembly and the limiting seat are locked to limit the position of the thermal transfer ribbon box relative to the machine body, in the releasing state, the limiting assembly and the limiting seat are unlocked to enable the thermal transfer ribbon box to move relative to the machine body, and the restoring force of the elastic piece ejects the thermal transfer ribbon box out of the machine body by a first preset distance T; a user can control the thermal transfer ribbon box to be fixed and released in the containing cavity of the machine body, and therefore the thermal transfer ribbon box can be rapidly and conveniently replaced. The first preset distance T does not exceed one third of the length L of the thermal transfer ribbon box, so that the thermal transfer ribbon box which is popped up can be replaced more conveniently, the thermal transfer ribbon box cannot be popped up excessively, the situation that the thermal transfer ribbon box falls off or collides with other objects in the popping-up process can be improved, and the damage probability is reduced.

Description

Technical Field

[0001] This application relates to the field of printing technology, and more particularly to a label printer. Background Technology

[0002] Label printers use heat and pressure applied by the printhead to transfer ink from a ribbon to the surface of label paper, thus creating the desired text and barcode information. In practical use, the ribbon gradually depletes as printing jobs accumulate, requiring timely replacement to ensure continuous printing.

[0003] In related technologies, users need to manually remove the used ribbon and install a new one. During the manual operation, it is inconvenient to handle the ribbon, and the ribbon may be damaged due to improper operation during the replacement process. Utility Model Content

[0004] This application provides a label printer that solves the problem of inconvenient ribbon loading and unloading during replacement.

[0005] This application provides a label printer, which includes a body, a ribbon cartridge, a limiting component, and an elastic element. The body has a receiving cavity for accommodating the ribbon cartridge. The ribbon cartridge includes a base and a limiting seat connected to the base. The limiting component is disposed in the receiving cavity and installed in the body. The limiting component has a limiting state in which it is locked with the limiting seat to restrict the position of the ribbon cartridge relative to the body, and a releasing state in which it is unlocked from the limiting seat to allow the ribbon cartridge to move relative to the body. The elastic element is disposed in the receiving cavity and connected to one of the ribbon cartridge and the body. In the releasing state of the limiting component, the restoring force of the elastic element pushes the ribbon cartridge out of the body by a first preset distance T. The length of the ribbon cartridge is L, and T and L satisfy: 0 < T / L ≤ 1 / 3.

[0006] In some embodiments, the ribbon cartridge further includes a shaft sleeve, the shaft sleeve having a ribbon housed inside, the shaft sleeve being located on the same side of the base and connected to the base, and at least a portion of the shaft sleeve being disposed in the receiving cavity; the elastic member is disposed at the end of the shaft sleeve away from the base, with one end of the elastic member abutting against the shaft sleeve and the other end abutting against the body, so that in the released state of the limiting assembly, the restoring force of the elastic member pushes a portion of the base out of the body.

[0007] In some embodiments, the ribbon cartridge further includes a ribbon shaft for winding ribbon; the ribbon shaft is rotatably mounted on the base about its axial direction, and the restoring force of the elastic element pushes the ribbon cartridge out of the body along the axial direction of the ribbon shaft; wherein the elastic element is sleeved on the outside of the ribbon shaft.

[0008] In some embodiments, the ribbon cartridge further includes two ribbon shafts, the two ribbon shafts being parallel in axis and arranged side by side in a direction perpendicular to the axis of the ribbon shafts, each ribbon shaft being rotatably mounted on the base about its axis; one of the two ribbon shafts is used for winding the ribbon and the other for unwinding the ribbon, and the label printer includes at least one of the elastic elements, each elastic element being arranged corresponding to one of the ribbon shafts.

[0009] In some embodiments, the label printer further includes a transmission assembly comprising two drive shafts, each drive shaft being inserted into one of the ribbon shafts; one of the ribbon shafts rotates under the action of the drive shafts it is inserted into, and drives the other ribbon shaft and the other drive shaft to rotate via the drive shafts.

[0010] In some embodiments, the ribbon cartridge is inserted into the receiving cavity along the axial direction of the ribbon shaft; the ribbon shaft is provided with a plurality of first insertion portions along its circumference, and the drive shaft is provided with a plurality of second insertion portions along its circumference. One of the first insertion portions and the second insertion portions is an insertion groove, and the other is a limiting rib. The limiting rib is inserted into the insertion groove along the axial direction of the ribbon shaft, so that the drive shaft can drive the ribbon shaft to rotate.

[0011] In some embodiments, the limiting structure includes a rotating shaft, a locking block, and a handle. The rotating shaft is rotatably mounted on the machine body; the locking block is connected to the rotating shaft; the handle is connected to the locking block and is used by a user to hold the handle and rotate it around the rotating shaft, thereby allowing the limiting structure to switch back and forth between the limiting state and the releasing state; in the limiting state, the locking block engages with the limiting seat.

[0012] In some embodiments, the limiting seat has a snap-fit ​​groove and a guide wall, the guide wall being inclined from the opening of the snap-fit ​​groove to the bottom of the groove; during the process of the limiting structure switching from the release state to the limiting state, the guide wall contacts the snap-fit ​​block to guide the snap-fit ​​block into the snap-fit ​​groove, and in the limiting state, the snap-fit ​​block is engaged in the snap-fit ​​groove.

[0013] In some embodiments, the body includes a main housing having the accommodating cavity, the main housing including a bottom wall having a first opening communicating with the accommodating cavity; the limiting structure includes a handle passing through the first opening and extending to the outside of the bottom wall, the handle being for a user to hold to switch the limiting structure back and forth between the released state and the limiting state.

[0014] In some embodiments, the ribbon box includes two parallel ribbon sleeves, both of which are disposed on the base. The ribbon sleeves are used to accommodate the ribbon, and the limiting seat is located between the two ribbon sleeves.

[0015] In some embodiments, the body further includes a bracket disposed in the accommodating cavity; the bracket has a guide hole, and in the limited position, the limiting seat passes through the guide hole and is locked with the limiting structure, and the surface of the limiting seat is in contact with the wall of the guide hole.

[0016] In some embodiments, the ribbon cartridge further includes a ribbon sleeve and a ribbon shaft respectively disposed on the base, at least a portion of the ribbon shaft being disposed inside the ribbon sleeve, and the ribbon shaft being used for winding the ribbon; the outer wall surface of the ribbon sleeve includes a plurality of first guide surfaces arranged circumferentially around the ribbon shaft, wherein at least two of the first guide surfaces are arranged at an included angle, and the first guide surfaces slide in cooperation with the wall surface of the housing defining the receiving cavity to guide the ribbon sleeve to move relative to the receiving cavity along the axial direction of the ribbon shaft.

[0017] In some embodiments, the housing further includes a bracket disposed in the receiving cavity. Along the ejection direction of the ribbon cartridge, the bracket divides the receiving cavity into a first cavity and a second cavity. The bracket has a second opening communicating with the first cavity and the second cavity. The ribbon cartridge includes a shaft sleeve disposed in the base. The shaft sleeve is used to receive the ribbon. The shaft sleeve passes through the second opening and is partially located in the first cavity. The shaft sleeve slides against the wall surface of the bracket that defines the second opening. The base is disposed in the second cavity.

[0018] In some embodiments, the base has a first mating surface facing the bracket, and the ribbon cartridge further includes a limiting protrusion disposed on the first mating surface; the bracket has a second mating surface facing the base, and the second mating surface is provided with a second limiting groove; in the limiting state of the limiting component, the first mating surface and the second mating surface are in contact, and the limiting protrusion is engaged with the second limiting groove.

[0019] In some embodiments, the size of the base is A, where A > T, along the ejection direction of the ribbon cartridge.

[0020] Based on the label printer of this application embodiment, the user can control the fixing and releasing of the ribbon cartridge within the receiving cavity of the printer body through the locking and unlocking function of the limiting component. When the limiting component is released, the restoring force of the elastic element pushes the ribbon cartridge out of the printer body by a first preset distance T, with the ribbon cartridge protruding from the body for easy access by the user, thus enabling quick and convenient replacement of the ribbon cartridge. The first preset distance T does not exceed one-third of the ribbon cartridge length L. Within this range, the ribbon cartridge can be reached by the user after ejection, and the ribbon cartridge will not eject excessively, thereby improving the situation where the ribbon cartridge falls or collidees with other objects during ejection, and reducing the probability of damage to the ribbon cartridge due to improper operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a label printer according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of a carbon ribbon cassette according to an embodiment of this application;

[0024] Figure 3 This is a partial exploded view of a label printer according to an embodiment of this application;

[0025] Figure 4 This is another partially exploded view of a label printer according to an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the structure of a limiting component according to an embodiment of this application;

[0027] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle;

[0028] Figure 7 This is another structural schematic diagram of a label printer according to an embodiment of this application.

[0029] Figure label:

[0030] 1. Label printer;

[0031] 10. Body; 100. Receiving cavity; 10a. First cavity; 10b. Second cavity; 11. Main housing; 111. Bottom wall; 11a. First opening; 12. Bracket; 121. Guide hole; 122. Second opening; 123. Second mating surface; 124. Second limiting groove;

[0032] 20. Ribbon box; 21. Base; 211. First mating surface; 22. Limiting seat; 221. Snap-fit ​​groove; 222. Guide wall; 23. Sleeve with shaft; 23a. First guide surface; 24. Ribbon shaft; 25. Limiting protrusion;

[0033] 30. Limiting component; 31. Rotating shaft; 32. Locking block; 33. Handle;

[0034] 40. Elastic components;

[0035] 50. Transmission assembly; 51. Drive shaft; 511. Second insertion part; 52. Driving gear; 53. Driven gear. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] In label printers, the ribbon is a crucial consumable in the printing process, playing a vital role in transferring image or text information from the print head to the label paper. In practical use, as printing jobs accumulate, the ribbon is gradually consumed, necessitating regular replacement to ensure continuous printing. In related technologies, ribbon replacement involves manual operation; users must manually remove the used ribbon and install a new one. This process is inconvenient, and improper operation can damage the ribbon. Therefore, this application provides a label printer.

[0038] Please see Figures 1-3 The label printer 1 of this application embodiment includes a body 10, a ribbon cartridge 20, a limiting component 30, and an elastic member 40. The body 10 has a receiving cavity 100, which provides receiving space for the ribbon cartridge 20. The ribbon cartridge 20 is detachably disposed in the receiving cavity 100. Please refer to [link to relevant documentation]. Figure 2The ribbon cartridge 20 includes a base 21 and a limiting seat 22 connected to the base 21. A limiting component 30 is disposed within the receiving cavity 100 and installed on the body 10. The limiting component 30 has a limiting state and a releasing state. In the limiting state, the limiting component 30 is locked with the limiting seat 22 to restrict the position of the ribbon cartridge 20 relative to the body 10. In the releasing state, the limiting component 30 is unlocked from the limiting seat 22 to allow the ribbon cartridge 20 to move relative to the body 10. By locking and unlocking the limiting component 30, the user can control the fixing and releasing of the ribbon cartridge 20 within the receiving cavity 100 of the body 10.

[0039] The elastic element 40 is disposed in the receiving cavity 100 and connected to one of the ribbon cartridge 20 and the body 10. When the limiting component 30 is released, the restoring force of the elastic element 40 pushes the ribbon cartridge 20 out of the body 10 by a first preset distance T, making it easy for the user to pick up and thus quickly and conveniently replace the ribbon cartridge 20. The length of the ribbon cartridge 20 is L, and T and L satisfy: 0 < T / L ≤ 1 / 3. The first preset distance T does not exceed one-third of the length L of the ribbon cartridge. Within this range, after the ribbon cartridge 20 is ejected, the user can more easily reach and pick up the ribbon cartridge 20, thus quickly and conveniently replacing the ribbon cartridge 20. The ribbon cartridge 20 will not eject excessively, thereby improving the situation where the ribbon cartridge 20 falls or bumps with other objects during the ejection process, reducing the probability of damage to the ribbon cartridge 20 due to improper operation, and helping to improve the user experience.

[0040] Optionally, along the ejection direction of the ribbon cartridge 20, the size of the base 21 is A, where A > T. That is, under the restoring force of the elastic element 40, the base 21 of the ribbon cartridge 20 is ejected from the receiving cavity 100. The design of the ejected base 21 can provide visual feedback to the user, indicating that the ribbon cartridge 20 is in a removable state, and the user can remove the base 21 to replace the ribbon cartridge 20.

[0041] In some embodiments, the ribbon cartridge 20 further includes a spindle sleeve 23, which houses the ribbon and is used to contain the ribbon to ensure smooth and orderly ribbon delivery during printing. The spindle sleeve 23 and the limiting seat 22 are located on the same side of the base 21 and connected to the base 21, with at least a portion of the spindle sleeve 23 disposed in the receiving cavity 100. An elastic member 40 is disposed at the end of the spindle sleeve 23 away from the base 21, with one end of the elastic member 40 abutting against the spindle sleeve 23 and the other end abutting against the machine body 10, so that in the released state of the limiting assembly 30, the restoring force of the elastic member 40 pushes a portion of the base 21 out of the machine body. In practical applications, to accommodate different printer models and ribbon cartridge specifications, the elastic member 40 can be connected to the end of the spindle sleeve 23 away from the base 21 and abut against the machine body 10. Alternatively, the elastic element 40 can be connected to the body 10 and abut against the end of the shaft sleeve 23 away from the base 21.

[0042] For example, the elastic element 40 can be a spring. When the limiting component 30 is in the limiting state, the ribbon cartridge 20 is kept in the receiving cavity 100 of the body 10. In the insertion direction of the ribbon cartridge 20, the spring is compressed by the action of the ribbon cartridge 20 and stores elastic potential energy. The spring has good elasticity and restoring force. When the limiting component 30 is released, the spring can quickly and smoothly push part of the ribbon cartridge 20 out of the receiving cavity 100.

[0043] Please continue reading. Figure 2 The ribbon cartridge 20 includes two parallel shaft sleeves 23, both of which are located on the base 21. The limiting seat 22 is connected to the base 21 and located between the two shaft sleeves 23, providing a balanced support point for the ribbon cartridge 20. In addition, the spaced arrangement of the limiting seat 22 and the shaft sleeves 23 can reduce the interference between the limiting seat 22 and the shaft sleeves 23, which helps to reduce the shaking or vibration of the ribbon cartridge 20 during operation, thereby improving its structural stability.

[0044] In some embodiments, the ribbon cartridge 20 further includes a ribbon shaft 24 for winding the ribbon. The ribbon shaft 24 is rotatably mounted on the base 21 about its axial direction. It should be noted that the end of the shaft sleeve 23 has a through hole, with part of the ribbon shaft 24 located inside the shaft sleeve 23 and the other part extending out of the shaft sleeve 23 through the through hole. An elastic element 40 abuts against the end of the shaft sleeve 23 and is sleeved on the outside of the ribbon shaft 24. This reduces the risk of interference between the ribbon shaft 24 and the elastic element 40, lowers the probability of the elastic element 40 becoming misaligned due to interference from the ribbon shaft 24, and reduces unnecessary contact between the ribbon shaft 24 and the machine body 10 due to elastic force, thus preventing displacement or damage. The restoring force of the elastic element 40 pushes the ribbon cartridge 20 out of the machine body along the axial direction of the ribbon shaft 24, facilitating user replacement or installation of the ribbon cartridge 20.

[0045] In some embodiments, at least a portion of the ribbon shaft 24 is disposed inside the ribbon sleeve 23. The outer wall surface of the ribbon sleeve 23 includes a plurality of first guide surfaces 23a arranged circumferentially around the ribbon shaft 24, wherein at least two of the first guide surfaces 23a are arranged at an included angle. The first guide surfaces 23a slide in cooperation with the wall surface of the housing 10 that defines the receiving cavity 100, so as to guide the ribbon sleeve 23 to move relative to the receiving cavity 100 along the axial direction of the ribbon shaft 24. The guide and limiting structure reduces unnecessary offset and shaking of the ribbon cartridge 20 during the insertion process, so that the ribbon cartridge 20 moves more smoothly during the insertion process.

[0046] The ribbon cartridge 20 also includes two ribbon shafts 24, one for winding the ribbon and the other for unwinding it. The two ribbon shafts 24 are parallel in axis and arranged side-by-side in a direction perpendicular to their axial direction, and each ribbon shaft 24 is rotatably mounted on the base 21 about its axial direction. The ribbon is transferred from one ribbon shaft 24 to the other by rotating the two ribbon shafts 24 in the same direction. In this embodiment, the label printer 1 includes at least one elastic element 40, each elastic element 40 corresponding to one of the ribbon shafts 24, so that the elastic element 40 can push out of the ribbon cartridge 20 along the axial direction of the ribbon shaft 24.

[0047] In practical use, the label printer 1 can be equipped with one elastic element 40, which is applied to the ribbon shaft 24 for winding the ribbon, or the elastic element 40 is applied to the ribbon shaft 24 for unwinding the ribbon. The elastic element 40 can push the ribbon cartridge 20 out of the receiving cavity 100. The internal structure of the machine body 10 is relatively simple and the manufacturing cost is low. Optionally, the label printer 1 is equipped with two elastic elements 40, one of which is applied to the ribbon shaft 24 for winding the ribbon, and the other is applied to the ribbon shaft 24 for unwinding the ribbon. The ribbon cartridge 20 is subjected to uniform force on both sides in the direction perpendicular to the axial direction of the ribbon shaft 24. The two elastic elements 40 simultaneously release the stored elastic potential energy, jointly pushing the ribbon cartridge 20 out smoothly in the axial direction of the ribbon shaft 24.

[0048] In this embodiment, the label printer 1 further includes a transmission assembly 50, which drives the ribbon shaft 24 in the ribbon cartridge 20 to rotate, thereby achieving smooth ribbon delivery. Please refer to... Figure 3 The transmission assembly 50 includes two transmission shafts 51, each of which is inserted into a carbon belt shaft 24. One of the carbon belt shafts 24 rotates under the action of the transmission shaft 51 it is inserted into, and drives the other carbon belt shaft 24 and the other transmission shaft 51 to rotate through the transmission shaft 51. In this way, the transfer and conveying of carbon belt between the two carbon belt shafts 24 is realized through the rotation of the two carbon belt shafts 24.

[0049] For example, the transmission assembly 50 can achieve coaxial rotation of the two transmission shafts 51 through gear meshing; see [link to relevant documentation]. Figure 4The transmission assembly 50 also includes a driving gear 52 and a driven gear 53. The driving gear 52 is coaxially connected to one of the transmission shafts 51, and the driven gear 53 is coaxially connected to the other transmission shaft 51. Thus, the driving gear 52 drives the coaxially connected transmission shaft 51 to rotate, thereby driving the carbon belt shaft 24, which is inserted and engaged with the transmission shaft 51, to rotate. The driven gear 53 drives the coaxially connected transmission shaft 51 to rotate, thereby driving the carbon belt shaft 24, which is inserted and engaged with the transmission shaft 51, to rotate. Optionally, the driving gear 52 and the driven gear 53 mesh, or the driving gear 52 and the driven gear 53 are connected by other transmission gears to achieve synchronous rotation.

[0050] In some embodiments, the carbon ribbon shaft 24 and the drive shaft 51 are coaxially configured, and an insertion structure is provided between them to ensure the coaxiality between the carbon ribbon shaft 24 and the drive shaft 51. The carbon ribbon box 20 is inserted into the receiving cavity 100 along the axial direction of the carbon ribbon shaft 24. The carbon ribbon shaft 24 is provided with a plurality of first insertion portions along its circumference, and the drive shaft 51 is provided with a plurality of second insertion portions 511 along its circumference. One of the first insertion portions and the second insertion portions 511 is an insertion groove, and the other is a limiting rib. The limiting rib is inserted into the insertion groove along the axial direction of the carbon ribbon shaft, so that the drive shaft 51 can drive the carbon ribbon shaft 24 to rotate. This realizes effective transmission between the carbon ribbon shaft 24 and the drive shaft 51, improves slippage, and enhances the stability and reliability of the transmission process.

[0051] Optionally, the first insertion part is a limiting rib, and the second insertion part 511 is an insertion groove. The end of the carbon ribbon shaft 24 is provided with a mating groove, and the inner wall of the mating groove is provided with multiple limiting ribs. The end of the drive shaft 51 is provided with a mating part, and the outer wall of the mating part is provided with multiple insertion grooves. After the carbon ribbon box 20 is installed in place, the mating part is inserted into the mating groove to make the carbon ribbon shaft 24 and the drive shaft 51 coaxially connected, and the multiple limiting ribs are inserted one-to-one into the multiple insertion grooves to limit the circumferential relative displacement of the carbon ribbon shaft 24 and the drive shaft 51.

[0052] In this embodiment, the limiting component 30 can lock and unlock the ribbon cartridge 20, allowing the user to complete the replacement or maintenance of the ribbon cartridge 20 in a short time. Please refer to... Figure 5The limiting component 30 includes a rotating shaft 31, a locking block 32, and a handle 33. The rotating shaft 31 is rotatably mounted on the machine body, the locking block 32 is connected to the rotating shaft 31, and the handle 33 is connected to the locking block 32. In the limiting state, the locking block 32 engages with the limiting seat 22 to ensure the secure installation of the ribbon cartridge 20 and reduce the possibility of the ribbon cartridge 20 loosening or falling off due to vibration or external force during use. In the released state, the locking block 32 disengages from the limiting seat 22, allowing the ribbon cartridge 20 to move relative to the machine body 10. In actual use, the user holds the handle 33 and controls it to rotate around the rotating shaft 31, changing the position of the locking block 32, thereby switching the limiting component 30 between the limiting state and the released state. The operation is simple.

[0053] like Figure 6 As shown, the limiting seat 22 has a locking groove 221 and a guide wall 222, which is inclined from the opening of the locking groove 221 to the bottom of the groove. The locking block 32 can move smoothly along the guide wall 222 and enter the locking groove 221. During the process of the limiting component 30 switching from the release state to the limiting state, the guide wall 222 contacts the locking block 32 and guides the locking block 32 to enter the locking groove 221. When the limiting component 30 switches to the limiting state, the locking block 32 is engaged in the locking groove 221.

[0054] Please see Figure 7 The handle 33 of the limiting component 30 extends at least partially out of the body 10, allowing the user to grasp and actuate the handle 33. The body 10 includes a main housing 11 having a receiving cavity 100 and a bottom wall 111 having a first opening 11a communicating with the receiving cavity. The handle 33 of the limiting component 30 passes through the first opening 11a and extends to the outside of the bottom wall 111, allowing the user to operate the label printer 1 from the outside by grasping or actuating the handle 33 to switch the limiting component 30 between a released state and a limited state.

[0055] In some embodiments, the housing 10 further includes a bracket 12 disposed in the receiving cavity 100. The bracket 12 provides support for the ribbon cartridge 20 and has a guide hole 121. In the limited state, the limiting seat 22 passes through the guide hole 121 and locks with the limiting component 30. During the insertion of the ribbon cartridge 20, the limiting seat 22 reaches the snap-fit ​​position under the restriction of the guide hole 121. The surface of the limiting seat 22 fits against the wall of the guide hole 121, further enhancing the limiting effect so that the limiting seat 22 can smoothly engage with the limiting component 30.

[0056] In some embodiments, along the ejection direction of the ribbon cartridge 20, the bracket 12 divides the receiving cavity 100 into a first cavity 10a and a second cavity 10b. The bracket 12 has a second opening 122 that connects the first cavity 10a and the second cavity 10b. The shaft sleeve 23 of the ribbon cartridge 20 passes through the second opening 122 and is partially located in the first cavity 10a. The shaft sleeve 23 slides and fits against the wall surface of the bracket 12 that defines the second opening 122. The base 21 is located in the second cavity 10b. The bracket 12 provides support for the installation and receiving of the ribbon cartridge 20, so that the ribbon cartridge 20 can be smoothly and stably inserted into the receiving cavity 100.

[0057] In some embodiments, the base 21 has a first mating surface 211 facing the support 12, and the ribbon cartridge 20 further includes a limiting protrusion 25 disposed on the first mating surface 211. The support 12 has a second mating surface 123 facing the base 21, and the second mating surface 123 is provided with a second limiting groove 124. In the limiting state of the limiting component 30, the first mating surface 211 and the second mating surface 123 are in contact, and the limiting protrusion 25 is engaged with the second limiting groove 124. Thus, one end of the ribbon cartridge 20 along the axial direction of the ribbon shaft 24 is inserted into the transmission component 50, and the other end is engaged with the support 12. The ribbon cartridge 20 can be stably installed in the receiving cavity 100, and the ribbon cartridge 20 is not easily displaced or loosened due to vibration or external force during printing.

[0058] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0059] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A label printer, characterized in that, include: The body has a receiving cavity for accommodating the ribbon cartridge; A ribbon cartridge, the ribbon cartridge including a base and a limiting seat connected to the base; A limiting component is disposed within the receiving cavity and installed on the body. The limiting component has a limiting state in which it is locked with the limiting seat to limit the position of the ribbon cartridge relative to the body, and a releasing state in which it is unlocked from the limiting seat to allow the ribbon cartridge to move relative to the body. as well as An elastic element is disposed in the receiving cavity and connected to one of the ribbon cartridge and the body, so that in the released state of the limiting assembly, the restoring force of the elastic element pushes the ribbon cartridge out of the body by a first preset distance T, wherein the length of the ribbon cartridge is L, and T and L satisfy: 0 < T / L ≤ 1 / 3.

2. The label printer according to claim 1, characterized in that, The ribbon box also includes a shaft sleeve, which contains a ribbon. The shaft sleeve and the limiting seat are located on the same side of the base and connected to the base. At least a portion of the shaft sleeve is disposed in the receiving cavity. The elastic element is located at the end of the shaft sleeve away from the base, with one end of the elastic element abutting against the shaft sleeve and the other end abutting against the machine body, so that in the released state of the limiting assembly, the restoring force of the elastic element pushes a portion of the base out of the machine body.

3. The label printer according to claim 1, characterized in that, The ribbon box also includes a ribbon shaft for winding the ribbon. The carbon ribbon shaft is rotatably mounted on the base about its axial direction, and the restoring force of the elastic element pushes the carbon ribbon box out of the machine body along the axial direction of the carbon ribbon shaft. The elastic element is sleeved on the outside of the carbon belt shaft.

4. The label printer according to claim 1, characterized in that, The ribbon box also includes two ribbon shafts, which are parallel in axis and arranged side by side in a direction perpendicular to the axis of the ribbon shaft. Each ribbon shaft is rotatably mounted on the base about its axis. One of the two ribbon shafts is used for winding the ribbon and the other for unwinding the ribbon. The label printer includes at least one of the elastic elements, each elastic element being configured corresponding to one of the ribbon shafts.

5. The label printer according to claim 4, characterized in that, The label printer also includes a transmission assembly, which includes two transmission shafts, each of which is inserted into one of the ribbon shafts. One of the carbon ribbon shafts rotates under the action of the drive shaft that it is inserted into, and drives the other carbon ribbon shaft and the other drive shaft to rotate through the drive shaft.

6. The label printer according to claim 5, characterized in that, The ribbon cartridge is inserted into the receiving cavity along the axial direction of the ribbon shaft; The carbon ribbon shaft is provided with a plurality of first insertion parts along its circumference, and the drive shaft is provided with a plurality of second insertion parts along its circumference. One of the first insertion parts and the second insertion parts is an insertion groove and the other is a limiting rib. The limiting rib is inserted into the insertion groove along the axial direction of the carbon ribbon shaft so that the drive shaft can drive the carbon ribbon shaft to rotate.

7. The label printer according to claim 1, characterized in that, The limiting structure includes: The rotating shaft is rotatably mounted on the machine body; A locking block, connected to the rotating shaft; and, A handle is connected to the locking block. The handle is used by a user to hold the handle and rotate it around the pivot, thereby allowing the limiting structure to switch back and forth between the limiting state and the releasing state. In the limited position state, the locking block engages with the limiting seat.

8. The label printer according to claim 7, characterized in that, The limiting seat has a snap-fit ​​groove and a guide wall, the guide wall being inclined from the opening of the snap-fit ​​groove to the bottom of the groove; During the process of the limiting structure switching from the release state to the limiting state, the guide wall contacts the locking block to guide the locking block into the locking groove, and in the limiting state, the locking block is locked into the locking groove.

9. The label printer according to claim 1, characterized in that, The fuselage includes a main housing, the main housing having the accommodating cavity, the main housing including a bottom wall, the bottom wall having a first opening communicating with the accommodating cavity; The limiting structure includes a handle that passes through the first opening and extends to the outside of the bottom wall. The handle is for a user to hold and switch the limiting structure back and forth between the released state and the limiting state.

10. The label printer according to claim 1, characterized in that, The ribbon box includes two parallel shaft sleeves, both of which are located on the base. The shaft sleeves are used to accommodate the ribbon, and the limiting seat is located between the two shaft sleeves.

11. The label printer according to claim 1, characterized in that, The body also includes a bracket, which is disposed in the receiving cavity; The bracket has a guide hole. In the limited position state, the limiting seat passes through the guide hole and is locked with the limiting structure, and the surface of the limiting seat is in contact with the wall of the guide hole.

12. The label printer according to claim 1, characterized in that, The ribbon box also includes a ribbon sleeve and a ribbon shaft respectively disposed on the base, at least a portion of the ribbon shaft is disposed inside the ribbon sleeve, and the ribbon shaft is used to wind the ribbon. The outer wall surface of the sleeve with shaft includes a plurality of first guide surfaces arranged circumferentially around the carbon ribbon shaft, wherein at least two of the first guide surfaces are arranged at an included angle, and the first guide surfaces slide in cooperation with the wall surface of the housing that defines the receiving cavity, so as to guide the sleeve with shaft to move relative to the receiving cavity along the axial direction of the carbon ribbon shaft.

13. The label printer according to claim 1, characterized in that, The body also includes a bracket disposed in the accommodating cavity. Along the ejection direction of the ribbon cartridge, the bracket divides the accommodating cavity into a first cavity and a second cavity. The bracket is provided with a second opening connecting the first cavity and the second cavity. The ribbon cartridge includes a shaft sleeve disposed on the base, the shaft sleeve being used to accommodate the ribbon, the shaft sleeve passing through the second opening and partially located in the first cavity, and the shaft sleeve slidingly fitting against the wall surface of the bracket defining the second opening, the base being disposed in the second cavity.

14. The label printer according to claim 13, characterized in that, The base has a first mating surface facing the bracket, and the ribbon box further includes a limiting protrusion provided on the first mating surface; The bracket has a second mating surface facing the base, and the second mating surface is provided with a second limiting groove; In the limiting state of the limiting component, the first mating surface is in contact with the second mating surface, and the limiting protrusion is engaged with the second limiting groove.

15. The label printer according to claim 1, characterized in that, Along the ejection direction of the ribbon cartridge, the size of the base is A, where A > T.

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