Double roller seal core and seal containing same

Abstract

A double roller ink core and a seal containing the same, the ink core structure comprising a first roller seat (1) and a second roller seat (2) which are coaxially arranged, the first roller seat (1) and the second roller seat (2) being capable of relatively rotating; a pressing assembly (a) is arranged inside the second roller seat (2), the pressing assembly (a) being used to drive the second roller seat (2) to rotate circumferentially relative to the first roller seat (1); the above technical solution of the present application has the advantages of being more convenient and labor-saving in adjusting and changing the content to be printed, and the conversion and combination of various different contents can be realized by simply pressing a button.

Description

Technical Field

[0001] The present application relates to the technical field of quick stamps, and specifically refers to a double-roller stamp core and a stamp containing the same that can realize quick paper printing of mathematical formulas, numbers or other graphics. Background Art

[0002] At present, there is a kind of seal on the market that is used as a teaching or learning tool. It can realize the function of fast printing of mathematical formulas, numbers or other graphics on paper by rolling. This kind of seal can be reused and can also increase the interest of learning, thereby helping users to learn quickly and conveniently.

[0003] The structure of the existing seal tool includes two coaxially arranged roller parts and an external shell part, and patterns, numbers, etc. are engraved (protruding from the outer surface of the roller to achieve printing on paper) on the outer surface of the roller, and the content thereon is printed on the paper through the synchronous circumferential rotation of the two rollers; however, the content printed on the double rollers is fixed and limited to the different contents that can be printed within the circumferential area of ​​the rollers, and the printed content cannot be replaced. The limited area of ​​the rollers also makes it impossible to print infinitely, which makes the content of the existing seal tool unable to be replaced and relatively single (after rolling one circle, the content of the next circle will be repeated continuously); or Although the two rollers can rotate relative to each other to replace the content, the converted content is fixed by the engagement of a spring sheet and a groove (for example, a coaxial double-roller stamp disclosed in CN216993646U is a method of engagement of a spring sheet and a groove). This method requires overcoming the engagement force of the spring sheet and the groove during the relative rotation of the two rollers, and the required rotation force is relatively large (not suitable for children to operate). Moreover, such rotation for a long time will lead to a decrease in the engagement force between the spring sheet and the groove (wear of the groove), making it impossible to align the content on the two rollers and affecting printing, and it is also easy to cause the printed content to be skewed and uneven. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present application provides a double-roller printing core which makes it easier and more labor-saving to adjust and change the content to be printed, and can realize the change combination of various different contents by just pressing a button.

[0005] In order to solve the above technical problems, the technical solution adopted in this application is: a double-roller printing core, which structure includes a first roller seat and a second roller seat arranged coaxially, and the first roller seat and the second roller seat can rotate relative to each other; a pressing assembly is arranged in the second roller seat, and the pressing assembly is used to drive the second roller seat to rotate circumferentially relative to the first roller seat.

[0006] By adopting the above structure, the present application sets a pressing component in the printing core, and by pressing the component, the second roller seat can be made to rotate circumferentially relative to the first roller seat, thereby realizing the change of the graphic content on the two roller seats, so that the content of the two roller seats set relatively to each other changes, and each pressing can realize a content change, thereby realizing the conversion of content. Unlike the traditional double-roller seal structure, which is limited by the amount of circumferentially printed content, the present application can change once by pressing once, which effectively improves the diversity of content; and the present application only needs to press lightly through the pressing component to realize the change of printed content. Compared with the existing structure of spring sheet and groove clamping force, the force driving the double rollers to rotate relative to each other is lighter and more labor-saving, which can be adapted to children's operation, and is simple and fast.

[0007] Furthermore, the pressing assembly described in the present application includes a button located at the outer end of the second roller seat, a pressing shaft located in the second roller seat, a third roller seat is arranged between the pressing shaft and the second roller seat, and an elastic member is arranged between the pressing shaft and the first roller seat; the button abuts against the pressing shaft and can drive the pressing shaft to move axially, and the pressing shaft drives the third roller seat to drive the second roller seat to rotate circumferentially during the axial movement process; the above-mentioned structure of the present application can realize the axial forward and backward movement of the pressing shaft by pressing the button with external force, and realize the resetting of the pressing shaft in the absence of pressing force in combination with the elastic member, and this process realizes the circumferential rotation of the third roller seat and the second roller seat, so that the second roller seat can rotate relative to the first roller seat, and the graphics or numbers to be printed on the outer sides of the two can be aligned and transformed differently, thereby realizing the change of printed content.

[0008] Furthermore, a first protrusion is provided on the outer wall of the pressing shaft, and a bevel tooth is provided at the front end of the third roller seat, and the first protrusion is used to press against the bevel tooth; the inner wall of the second roller seat is provided with a plurality of radially inward convex strips, and a first sliding groove for the first protrusion to slide into is formed between two adjacent convex strips, and the adjacent end of the convex strip to the bevel tooth has a bevel surface for the first protrusion to abut against, and the tip formed by the bevel surface of the convex strip is aligned with the bevel tooth surface of the bevel tooth for the first protrusion to abut against and press (that is, the front tip of the bevel surface of the convex strip is closer to the bevel tooth surface of the bevel tooth for the first protrusion to abut against and press on the side); with the above structure, the present application moves the pressing shaft toward the first roller seat by pressing the button, At this time, the first protrusion on it will approach the bevel tooth along the first slide groove, and gradually approach the bevel tooth surface of the bevel tooth. If the pressure is continued, the first protrusion will gradually reach the tooth root of the bevel tooth along the bevel tooth surface of the bevel tooth. In this process, the third roller seat rotates circumferentially under the axial pressing force of the first protrusion and the tooth surface of the bevel tooth, and at the same time drives the second roller seat to rotate circumferentially, so that the graphics or numbers on the outer side of the second roller seat and the corresponding graphics or numbers on the first roller seat change relative to each other, thereby realizing the change of the overall printing core content; and the front tip of the convex inclined surface is closer to the side of the bevel tooth surface of the bevel tooth for the first protrusion to abut against the pressing side, so that after the pressing is completed and the reset process is completed, the first protrusion can be guided to slide into the next sequentially arranged slide groove.

[0009] Furthermore, the first protrusion is cylindrical and extends radially outward along the outer side wall of the pressing shaft, and the axis of the cylindrical first protrusion (the axis of the cylinder) is misaligned with the tooth tip of the helical tooth (that is, the axis of the cylinder and the axial direction of the tooth tip of the helical tooth are not in a straight line, and the axial direction of the cylindrical first protrusion is closer to the side of the helical tooth surface against which the helical tooth is to be abutted); with the above structure, the cylindrical first protrusion is smoother in the process of pressing the tooth surface of the helical tooth of the third roller seat and is not easy to get stuck; and the misalignment of the axis of the first protrusion with the tooth tip of the helical tooth can ensure that the first protrusion is more easily on the tooth surface of the helical tooth during the pressing process, and the second pressing after resetting can also realize circumferential drive of the third roller seat.

[0010] Furthermore, one side of the inclined surface on both sides of the tooth tip of the helical tooth is a small inclined surface and the other side is a large inclined surface, and the first protrusion is used to press against the large inclined surface; with the above structure, the pressing against the large inclined surface can make the third roller seat have a sufficient circumferential rotation angle, and the provision of the large inclined surface and the small inclined surface can also make it easier for the first protrusion to always drive the third roller seat to rotate circumferentially in one direction.

[0011] Furthermore, the radial thickness of the bevel teeth is matched with the radial thickness of the convex strip, and the pressing shaft is sleeved in the sliding space formed by the third roller seat and the inner wall of the convex strip, the height direction of the first protrusion interferes with the radial direction of the convex strip (that is, the two overlap in the height extension direction, so that a sliding fit relationship can be formed between the convex strip and the bevel teeth), and the outer end of the first protrusion does not contact the inner wall of the second roller seat; with the above structure, the radial extension depth of the inner wall of the bevel teeth and the inner wall of the convex strip of the present application is matched (the two are almost the same height), and then the first protrusion can realize the circumferential drive of the third roller seat during the pressing and resetting process, as well as the positioning after resetting, and can also ensure that the third roller seat is driven circumferentially again in the same direction by the second pressing.

[0012] Furthermore, the inclination direction of the inclination direction of the inclination direction of the inclination surface of the helical tooth used for the first protrusion to press against is opposite to the inclination direction of the inclination direction of the inclination surface of the convex strip used for the first protrusion to press against; with this structure, when the first protrusion presses along the inclination surface of the helical tooth to the root of the helical tooth to drive the third roller seat to rotate circumferentially, and then the pressing force is removed, during the elastic reset process of the elastic member, the first protrusion runs axially in the opposite direction and gradually presses against the inclination surface of the convex strip side. Since the inclination directions of the inclination surface of the helical tooth and the inclination surface of the convex strip are opposite, the first protrusion can drive the second roller seat to continue to rotate circumferentially and be consistent with the circumferential rotation direction of the third roller seat driven by the protrusion, that is, the process of the protrusion pressing the inclination surface of the helical tooth to drive the third roller seat and the process of the protrusion pressing the inclination surface of the convex strip to drive the second roller seat are both counterclockwise or clockwise, so as to prevent the first protrusion from being unable to drive a second time.

[0013] Furthermore, a second protrusion is provided on the side wall of the pressing shaft, and a second slide groove for the second protrusion to slide into is provided on the inner walls of the adjacent ends of the first roller seat and the third roller seat. When the button has no pressing force, the second protrusion is respectively arranged in the second slide grooves of the first roller seat and the third roller seat. When the button applies pressing force, the second protrusion gradually moves away from the second slide groove of the third roller seat and finally disengages therefrom. With the above structure, the present application can realize the pressing and resetting process of the elastic member by setting the second protrusion, so that the pressing shaft only moves axially without circumferential rotation under the limitation of the second protrusion and the second slide groove, and only makes the third roller seat and the second roller seat rotate circumferentially; and when there is no pressing force, the elastic member is in the resetting state to realize the circumferential positioning of the second roller seat and the first roller seat with each other, so that the two maintain circumferential synchronization during the printing rolling process, and the printed content will not be skewed and the printing will be more neat.

[0014] Furthermore, the outer wall of the third roller seat is provided with a third protrusion, and the corresponding second roller seat is provided with a third slide groove which is plugged and matched with the third protrusion; the above structure is adopted to realize the connection between the second roller seat and the third roller seat, and when the pressing component drives the third roller seat to rotate circumferentially, the second roller seat can be driven to rotate synchronously circumferentially at the same time.

[0015] Furthermore, the first protrusion and the second protrusion are located on the same straight line along the axial direction, and the outer diameter of the outer wall of the pressing shaft where the first protrusion is located is larger than the outer diameter of the outer wall where the second protrusion is located; adopting the above structure, during the operation of the pressing component, it is ensured that the third roller seat is circumferentially driven by the first protrusion and the second protrusion slides synchronously in the second slide groove in the same axial line, making the operation smoother; in addition, the unequal diameter setting of the pressing shaft can effectively save materials, save space, and make the overall structure more compact.

[0016] Furthermore, the first slide groove and the second slide groove are aligned in the axial direction; with this structure, the pressing component is smoother during operation, and the reset and subsequent secondary pressing are more accurate.

[0017] Furthermore, the number of helical teeth of the third roller seat is equal to the number of graphics (including patterns, texts or combinations of operations, etc.) or numbers arranged circumferentially on the outer side of the second roller seat, and each time the pressing component is pressed, the graphics or numbers driven by the second roller seat to rotate circumferentially are aligned axially with the graphics or numbers on the first roller seat; the above structure can ensure that the content of the graphics or numbers on the second roller seat is changed once the pressing is performed, so that the combined content formed on the two rollers as a whole is replaced to avoid single content.

[0018] Furthermore, the outer walls of the first roller seat and the second roller seat are respectively sleeved with a first printing pad and a second printing pad, the first printing pad and the second printing pad are provided with graphics or numbers to be printed, and the first printing pad and the second printing pad are used for absorbing printing ink; by adopting the above structure, sufficient printing ink can be stored in the printing pad to ensure clear printing, and printing can be performed repeatedly.

[0019] Furthermore, an ink storage cavity is further provided in the first roller seat, an opening is provided at the outer end of the ink storage cavity, a sealing cover is installed on the opening, and a discharge hole connected to the ink storage cavity is provided on the first roller seat, and the outer end of the discharge hole is in contact with the printing pad; with the above structure, ink can be stored in the ink storage cavity, and the ink can be continuously introduced to the printing pad through the discharge hole, thereby realizing a more durable ink supply, and with the existence of the ink storage cavity, ink can be repeatedly added, thereby extending the service life of the entire printing core.

[0020] Furthermore, both ends of the second protrusion in the axial direction are provided with inclined surfaces, and the corresponding groove openings of the second slide grooves are also provided with inclined surfaces; with the above structure, through the setting of the inclined surfaces, the second protrusion can be more easily guided into the second slide grooves of the first roller seat and the second roller seat during the sliding cooperation process, and it is not easy to get stuck.

[0021] The present application also provides a double-roller seal, which contains the double-roller seal core structure of the present application. The seal can realize the replacement of the printed content on the double rollers, thereby improving the richness and variety of the print content that can be changed.

[0022] Furthermore, the above-mentioned double-roller seal of the present application includes a first shell and a second shell that are arranged opposite to each other, and a third shell located at the bottom of the first shell and the second shell. The two ends of the ink core in the axial direction are rotatably connected to the first shell and the second shell. The ink core protrudes from the snap-fit ​​space formed by the first shell and the second shell. The third shell is snap-fitted to the first shell and the second shell and encapsulates the protruding part of the ink core. With the above-mentioned structure, the ink core is rotatably connected to the above-mentioned shells through the first shell and the second shell, and the rolling operation of the working process is realized through its protruding part. When not in use, the third shell is snap-fitted to realize the encapsulation of the entire ink core, which plays a protective role and prevents ink contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the printing core of this application.

[0024] Figure 2 A schematic diagram of the structure of the cross-sectional view of the printing core of this application.

[0025] Figure 3 A schematic structural diagram of a cross-sectional view of the printing core of the present application (the pressing shaft is not shown).

[0026] Figure 4 A schematic structural diagram of a cross-sectional view of the connection mechanism of the present application (the third roller seat is not shown).

[0027] Figure 5 Schematic diagram of the structure of the pressing shaft of this application.

[0028] Figure 6 A schematic structural diagram of the third roller seat of the present application.

[0029] Figure 7 A structural schematic diagram of a cross-sectional view of the cooperation between the pressing shaft and the third roller seat of the present application.

[0030] Figure 8 A schematic structural diagram of the second roller seat of the present application.

[0031] Fig. 9 A schematic structural diagram of the first roller seat of the present application.

[0032] Fig.10 A schematic structural diagram of the cooperation between the first roller seat and the pressing assembly of the present application.

[0033] Fig.11 Schematic diagram of the structure of the pressing component of this application.

[0034] Fig.12 Schematic diagram of the structure of the seal in use for this application.

[0035] Fig.13 Schematic diagram of the structure of this application seal when not in use.

[0036] Fig.14 A structural diagram of the assembly diagram of the seal of this application.

[0037] As shown in the accompanying drawings: a. pressing assembly, 1. first roller seat, 101. ink storage chamber, 102. opening, 103. discharge hole, 2. second roller seat, 21. convex strip, 22. inclined surface, 3. button, 4. pressing shaft, 41. first protrusion, 42. second protrusion, 5. third roller seat, 51. oblique teeth, 52. small inclined surface, 53. large inclined surface, 54. third protrusion, 6. elastic member, 7. first slide groove, 8. second slide groove, 9. third slide groove, 10. first printing pad, 11. second printing pad, 12. cover, 13. first shell, 14. second shell, 15. third shell. DETAILED DESCRIPTION

[0038] The following will combine the embodiments and drawings to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only preferred embodiments, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention;

[0039] It should also be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be another intermediate component, fixed through the intermediate component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] As attached Figure 1-4 As shown in , 11, a double-roller printing core of the present application comprises a coaxially arranged first roller seat 1 and a second roller seat 2 (the first roller seat and the second roller seat are coaxially arranged in sequence and side by side, and the content to be printed is arranged on the outer sides of the two roller seats, and the content is printed by contacting with the paper through ink during printing), the first roller seat 1 and the second roller seat 2 can rotate relative to each other; a pressing component a is arranged in the second roller seat 2 (that is, the second roller seat is a hollow cylindrical structure, the pressing component is sleeved in the cylindrical structure and extends to the first roller seat), and the pressing component a is used to drive the second roller seat 2 to rotate circumferentially relative to the first roller seat 1.

[0041] By adopting the above structure, the present application sets a pressing component in the printing core, and by pressing the component, the second roller seat can be made to rotate circumferentially relative to the first roller seat, thereby realizing the change of the graphic content on the two roller seats, so that the content of the two roller seats relatively set changes, and each pressing can realize a content change, thereby realizing the conversion of content. It is not necessary to be limited by the amount of circumferentially printed content like the traditional double-roller seal structure. The present application can change once by pressing once, which effectively improves the diversity of content; and the present application realizes the change of content through the pressing component. Compared with the existing structure of spring sheet and groove clamping force, the circumferential relative rotation force is lighter and more labor-saving, which can be adapted to children's operation, and is simple and fast.

[0042] As attached Figure 1-4As shown in Figures 11, the pressing assembly a described in the present application includes a button 3 located at the outer end of the second roller seat 2, a pressing shaft 4 located in the second roller seat 2, a third roller seat 5 is arranged between the pressing shaft 4 and the second roller seat 2, and an elastic member 6 is arranged between the pressing shaft 4 and the first roller seat 1; the button 3 abuts against the pressing shaft 4 and can drive the pressing shaft 4 to move axially (that is, when the button is pressed by an external force, the pressing shaft is pressed axially inwardly, and when the pressing force is removed, the pressing shaft can move axially outwardly under the action of the restoring force of the elastic member). The pressing shaft 4 drives the third roller seat 5 to drive the second roller seat 2 to rotate circumferentially during the axial movement of the pressing shaft 4; the above-mentioned structure of the present application can realize the axial forward and backward movement of the pressing shaft by pressing the button with external force, and realize the resetting of the pressing shaft in the absence of pressing force in combination with the elastic member. This process realizes the circumferential rotation of the third roller seat and the second roller seat, so that the second roller seat can rotate relative to the first roller seat, and the graphics or numbers to be printed on the outside of the two can be aligned and transformed differently, thereby realizing the change of the printed content.

[0043] Furthermore, a first protrusion 41 is provided on the outer wall of the pressing shaft 4, and a bevel tooth 51 is provided at the front end (close to the button end) of the third roller seat 5, and the first protrusion 41 is used to press against the bevel tooth 51; the inner wall of the second roller seat 2 is provided with a plurality of radially inward convex strips 21 (a plurality of convex strips are arranged at equal intervals along the circumference of the inner wall of the second roller seat), and a first slide groove 7 for the first protrusion 41 to slide into is formed between two adjacent convex strips, so that The end of the convex strip 21 adjacent to the bevel tooth 51 has a bevel 22 for the first protrusion 41 to abut against, and the tip formed by the bevel 22 (i.e., the front end of the convex strip close to the bevel tooth) is aligned with the bevel tooth surface of the bevel tooth 51 for the first protrusion 41 to abut against and press (i.e., the front tip of the bevel of the convex strip is closer to the bevel tooth surface of the bevel tooth for the first protrusion to abut against and press against, i.e., the tip is offset toward the bevel tooth surface of the bevel tooth for the first protrusion to abut against and press against); adopting the above structure, the present application is achieved by pressing The button moves the pressing axis toward the first roller seat, at which time the first protrusion on it will approach the bevel tooth along the first slide groove and gradually approach the bevel tooth surface of the bevel tooth. If the pressing is continued, the first protrusion will gradually reach the tooth root of the bevel tooth along the bevel tooth surface of the bevel tooth. In this process, the third roller seat rotates circumferentially under the axial pressing force of the first protrusion and the tooth surface of the bevel tooth, and at the same time drives the second roller seat to rotate circumferentially, so that the graphics or numbers on the outer side of the second roller seat change relative to the corresponding graphics or numbers on the first roller seat, thereby realizing the change of the overall printing core content; and the front tip of the convex strip inclined surface is closer to the bevel tooth surface side of the bevel tooth for the first protrusion to abut against the pressing side, so that the first protrusion can be guided to slide into the next sequentially arranged slide groove after the pressing is completed. The distance between the tooth tip of the bevel tooth and the adjacent end of the convex strip of the present application is greater than the outer diameter of the first protrusion, ensuring that the first protrusion has sufficient axial running space to realize the driving and resetting of the third roller seat.

[0044] As attached Figure 5 , 7 As shown in Figures 10 and 11, the first protrusion 41 described in the present application is cylindrical and extends radially outward along the outer wall of the pressing shaft 4, and the axis of the cylindrical first protrusion 41 (the axis of the cylinder) is misaligned with the tooth tip of the helical tooth 51 (that is, when there is no pressing force, the axis of the cylindrical first protrusion and the tooth tip of the helical tooth are not always in a straight line along the axial direction of the printing core, but the axis of the first protrusion slightly exceeds the tooth tip, see the attached Fig.10 As shown); with the above structure, the cylindrical first protrusion is smoother in the process of pressing the tooth surface of the helical tooth of the third roller seat and is not easy to get stuck; and the misalignment of the axis of the first protrusion and the tooth tip of the helical tooth can ensure that the first protrusion is more easily located on the tooth surface of the helical tooth during the pressing process, and the second pressing after resetting can also realize circumferential drive of the third roller seat.

[0045] As shown in the accompanying drawings, 7, 10-11, the inclined surfaces on both sides of the tooth tip of the helical tooth 51 described in the present application are a small inclined surface 52 on one side and a large inclined surface 53 on the other side (the small inclined surface 52 and the large inclined surface 53 bulge toward the middle to form a complete helical tooth 51, and the third roller seat 5 is provided with a plurality of such helical teeth connected to each other along the circumferential direction), and the first protrusion 41 is used for abutting and pressing against the large inclined surface 53; with the above structure, the abutment and pressing on the large inclined surface can make the third roller seat have a sufficient circumferential rotation angle, and the provision of the large inclined surface and the small inclined surface can also make it easier for the first protrusion to always drive the third roller seat to rotate circumferentially in one direction.

[0046] As an example, the attached Figure 2-4 As shown, the radial thickness of the helical teeth 51 described in the present application is adapted to the radial thickness of the convex strip 21, and the pressing shaft 4 is sleeved in the sliding space formed by the inner wall of the third roller seat 5 and the convex strip 21 (that is, the third roller seat and the second roller seat both have an axial cavity, the pressing shaft is sleeved in the axial cavity formed by the two, the third roller seat is sleeved in the second roller seat, the convex strip extends radially inward along the inner wall of the second roller seat and is adapted to the thickness of the third roller seat, that is, the thickness of the two are similar), and the height direction of the first protrusion 41 interferes with the radial direction of the convex strip 21 (that is, the two overlap in the height extension direction, see the attached details). Figure 2 , so that a sliding fit relationship can be formed between the convex strip and the bevel tooth), and the outer end of the first protrusion 41 does not contact the inner wall of the second roller seat; with the above structure, the radial extension depth of the inner wall of the bevel tooth and the inner wall of the convex strip of the present application is adapted (the two are almost at the same height), and then the first protrusion can realize the circumferential drive of the third roller seat during the pressing and resetting process, as well as the positioning after resetting, and can also ensure that the third roller seat is driven circumferentially again in the same direction when pressed for the second time.

[0047] As attached Figure 3As shown, the inclined direction of the inclined tooth surface of the helical tooth 51 described in the present application for the first protrusion 41 to abut against and press is opposite to the inclined direction of the inclined surface of the convex strip 21 for the first protrusion 41 to abut against and press (the opposite inclination direction here means that the inclination extension trends of the two are opposite, and it is not necessary to make the inclination angles formed by the two after inclination equal); as an example, the present application adopts the large inclined surface of the helical tooth as the helical tooth surface abutting against and pressing the first protrusion. With this structure, when the first protrusion is pressed along the helical tooth surface to abut against the root of the helical tooth, the process of driving The third roller seat rotates circumferentially, and then the pressing force is removed. During the elastic reset process of the elastic member, the first protrusion runs axially in the opposite direction and gradually abuts against the inclined surface of the convex strip. Since the inclined directions of the inclined tooth surface and the inclined surface of the convex strip are opposite, the first protrusion can drive the second roller seat to continue to rotate circumferentially and the circumferential rotation direction of the third roller seat driven by the protrusion is consistent, that is, the process of the protrusion pressing the inclined tooth surface to drive the third roller seat and the process of the protrusion pressing the inclined surface of the convex strip to drive the second roller seat are both counterclockwise or clockwise, so as to prevent the first protrusion from being unable to drive a second time.

[0048] As attached Figure 2 , 5 , 7 and 10, the side wall of the pressing shaft 4 described in the present application is provided with a second protrusion 42, and the inner walls of the adjacent ends of the first roller seat 1 and the third roller seat 5 are provided with a second slide groove 8 for the second protrusion 42 to slide into. When the button 3 has no pressing force, the second protrusion 42 is separately arranged in the second slide grooves 8 of the first roller seat 1 and the third roller seat 5 (that is, when there is no pressing force and the printing core is in use, the first roller seat and the third roller seat are synchronized in circumferential operation during printing through the cooperation between the second protrusion and the second slide grooves of the two roller seats. At this time, the second protrusion spans the connection between the first roller seat and the third roller seat to realize the circumferential limit of the two. ), when the button 3 applies pressing force, the second protrusion 42 gradually moves away from the second slide groove 8 of the third roller seat 5 and finally disengages from it; adopting the above structure, the present application can realize the pressing and elastic member resetting process by setting the second protrusion, so that the pressing shaft only moves axially without circumferential rotation under the limitation of the second protrusion and the second slide groove, and only makes the third roller seat and the second roller seat rotate circumferentially; and when there is no pressing force, the elastic member is in a resetting state to realize the circumferential positioning of the second roller seat and the first roller seat with respect to each other, and the two are kept synchronized during the printing rolling process, and the printed content will not be skewed and the printing will be more neat.

[0049] As attached Figure 2-4, 6-7 and 14, the outer side wall of the third roller seat 5 described in the present application is provided with a third protrusion 54, and the corresponding second roller seat 2 is provided with a third slide groove 9 which is plugged and matched therewith; the above structure is adopted to realize the connection between the second roller seat and the third roller seat, and when the pressing component drives the third roller seat to rotate circumferentially, the second roller seat can be driven to rotate circumferentially synchronously at the same time.

[0050] As attached Figure 5 As shown, the first protrusion 41 and the second protrusion 42 described in the present application are located on the same straight line along the axial direction, and the outer diameter of the outer wall where the first protrusion 41 of the pressing shaft 4 is located is larger than the outer diameter of the outer wall where the second protrusion 42 is located; adopting the above structure, during the operation of the pressing component, it is ensured that the third roller seat is circumferentially driven by the first protrusion and the second protrusion slides synchronously in the second slide groove in the same axial line, making the operation smoother; in addition, the unequal diameter setting of the pressing shaft can effectively save materials, save space, and make the overall structure more compact.

[0051] As attached Figure 3-4 As shown, the first slide groove 7 and the second slide groove 8 described in the present application are aligned along the axial direction; the first slide groove is used to accommodate the first protrusion when there is no pressing force, and the second slide groove is used to accommodate the second protrusion. The alignment of the two slide grooves makes the pressing component smoother during operation, and the reset and subsequent secondary pressing are more accurate; the product processing and manufacturing is also more convenient.

[0052] As an example, the number of helical teeth of the third roller seat 5 described in the present application is equal to the number of graphics (including patterns, texts, or operations, etc.) or numbers arranged circumferentially on the outer side of the second roller seat 2 (the number of graphics, texts, or operations, or numbers, etc. on the outer sides of the first roller seat and the second roller seat is the same and axially aligned), and each time the pressing component a is pressed, the graphics or numbers that drive the second roller seat 2 to rotate circumferentially and are axially aligned with the graphics or numbers on the first roller seat; by adopting the above structure, it can be ensured that the content of the graphics or numbers on the second roller seat is converted once by pressing once, and can also be axially aligned with the graphics or numbers outside the first roller seat, so that the combined content formed on the two rollers as a whole is replaced to avoid single content.

[0053] As attached Figure 1-4 As shown, the outer walls of the first roller seat 1 and the second roller seat 2 described in the present application are respectively sleeved with a first printing pad 10 and a second printing pad 11, and the first printing pad 10 and the second printing pad 11 are provided with graphics or numbers to be printed, and the first printing pad 10 and the second printing pad 11 are used for adsorbing printing ink; by adopting the above structure, sufficient printing ink can be stored in the printing pad to ensure clear printing, and printing can be repeated multiple times.

[0054] As attached Figure 2-4As shown, the first roller seat 1 described in the present application is further provided with an ink storage cavity 101 (i.e., a storage cavity for accommodating ink), the outer end of the ink storage cavity is provided with an opening 102, and a cover 12 is installed on the opening 102, and the first roller seat 1 is provided with a discharge hole 103 connected to the ink storage cavity, and the outer end of the discharge hole is in contact with the printing pad; with the above structure, the ink can be stored in the ink storage cavity, and the ink can be continuously introduced to the printing pad through the discharge hole, thereby realizing a more durable ink supply, and with the existence of the ink storage cavity, the ink can be repeatedly added, thereby extending the service life of the entire printing core.

[0055] As attached Figure 3 , 5 As shown in FIG. 7 , both ends of the second protrusion 42 in the axial direction of the present application are provided with inclined surfaces, and the corresponding notch of the second slide groove 8 is also provided with an inclined surface; by adopting the above structure, through the setting of the inclined surface, the second protrusion can be more easily guided into the second slide groove of the first roller seat and the second roller seat during the sliding cooperation process, and it is not easy to get stuck.

[0056] As attached Figure 12-14 As shown, the present application also provides a double-roller seal containing the above-mentioned seal core. The seal contains the structure of the double-roller seal core of the present application. The seal can realize the replacement of the printed content on the double rollers, thereby improving the richness and variety of the print content that can be changed.

[0057] As attached Figure 12-14 As shown, the above-mentioned double-roller stamp of the present application includes a first shell 13 and a second shell 14 arranged opposite to each other, and a third shell 15 located at the lower part of the first shell 13 and the second shell 14, the two ends of the ink core in the axial direction are rotatably connected to the first shell 13 and the second shell 14, and the ink core protrudes from the snap-fit ​​space formed by the first shell 13 and the second shell 14 (that is, after the first and second shells are snapped together, most of the upper part of the ink core is covered and the lower part of the ink core slightly protrudes from the shell to facilitate the contact with the paper during the printing and rolling process), and the third shell 15 is snapped on the first shell 13 and the second shell 14, and the protruding part of the ink core is encapsulated; by adopting the above-mentioned structure, the ink core is rotatably connected to the above-mentioned shell through the first shell and the second shell, and the rolling operation of the working process is realized through its protruding part. When not in use, the third shell is snapped together to realize the encapsulation of the entire ink core, which plays a protective role and prevents ink pollution.

[0058] The tooth tip of the bevel tooth surface for the first protrusion to abut and press against any of the bevel teeth in the present application should be axially aligned within the extension range of the bevel surface of a first slide groove, that is, the tooth tip is biased to the side of the extension range of the bevel surface of the first slide groove and will not be aligned with the slide groove; at the same time, the tip of the bevel surface of the next slide groove to be circumferentially distributed with the above-mentioned first slide groove to be slid out of the group should be axially aligned within the extension range of the bevel tooth surface against which the first protrusion of the above-mentioned bevel tooth abuts and presses; in this way, after the first protrusion runs axially from one slide groove and gradually presses the bevel tooth surface of a bevel tooth into the tooth root position, it can slide along the next slide groove inclined surface into the next circumferentially distributed slide groove when it is reset and runs in the reverse direction again. At this time, the protrusion is misaligned with the tooth tip of the next circumferentially distributed bevel tooth and biased to the side of the bevel tooth surface of the bevel tooth that needs to be abutted and pressed, ready for the second pressing; pressing in sequence can realize continuous circumferential drive rotation of the roller seat in the same direction.

[0059] The present application has multiple bevel teeth arranged along the circumferential direction, and each corresponding group of slide grooves is also arranged along the circumferential direction of the inner wall of the respective component, so as to facilitate the pressing and rotating process. Each press can make the protrusion enter the next slide groove in sequence and correspond to the next bevel tooth. The circumferential rotation angle of the roller seat achieved by pressing once in the present application is to ensure that the axial direction of the content to be printed on the two rollers remains aligned after rotation, ensuring the regularity of the printing and not skewed.

[0060] The working principle or use process of the double roller seal of the present application is as follows: First, follow the attached Fig.14The assembly diagram shows the various parts of the seal of the present application. The first roller seat and the second roller seat are coaxially arranged, and their inner ends abut against each other. The axial part of the first roller seat is sleeved in the second roller seat, and the axial end of the part abuts against the inner end of the third roller seat. When there is no pressing force, the second protrusion is located at the connection between the axial end of the part and the inner end of the third roller seat to ensure that the first roller seat and the second roller seat can roll synchronously in a circumferential limited manner at this time; the printing pads of the present application are respectively sleeved on the outside of the corresponding roller seats to form two coaxial and side-by-side complete roller structures; the lateral length formed by the first shell and the second shell of the present application after buckling is matched with the length of the printing core of the present application, and ... The printing core is assembled in the first shell and the second shell, so that the first roller seat and the second roller seat cooperate closely with each other to form a complete double-roller printing core structure; the various parts of the present application can be made of plastic, and the plastic parts have a certain deformation and restoring force, which is convenient for assembly, buckling and disassembly; the button of the present application has a radially protruding limit ring, which can abut against the inner wall of the shell to prevent the limit button from detaching from the shell; taking the mathematical operation public display set on the outer side of the double rollers as an example, the outer side of the first roller seat is a single number or a number plus an operator, and the corresponding outer side of the second roller seat is an operator plus a number or a single number; when it is necessary to change the content corresponding to the axial direction of the first roller seat and the second roller seat, press the button with your finger The button pushes the pressing shaft to squeeze the elastic member (the elastic member of the present application is a straight spring, one end of which is sleeved on the pressing shaft and the other end is against the inner cavity wall of the first roller seat) to compress. In this process, the first protrusion approaches the helical teeth of the third roller seat together with the pressing shaft and gradually contacts and presses against the tooth surface of the helical teeth. At the same time, the second protrusion also disengages from the second slide groove of the third roller seat and slides to the second slide groove of the first roller seat. Due to the cooperation between the second protrusion and the second slide groove, the pressing shaft only moves axially and does not rotate circumferentially in this process. In the above process, since the first protrusion contacts the inclined tooth surface of the helical teeth, it will inevitably guide the third roller seat to rotate circumferentially. At the same time, the third roller seat and the second roller seat are connected to each other through the third protrusion, so that the second The roller seats also rotate synchronously in the circumferential direction, thereby realizing the rotation of the content to be printed on the outer side of the second roller seat. Each rotation realizes a new alignment transformation with the printed content on the first roller seat. After the transformation is realized, the button is released, and the pressing shaft is pushed to reset under the action of the restoring force of the elastic member. During the resetting process, the first protrusion enters the first slide groove under the guidance of the convex inclined surface, and the second protrusion enters the second slide groove of the third roller seat again. The pressing shaft cannot rotate in the circumferential direction, but under the guidance of the convex inclined surface, it will drive the second roller seat to rotate in the circumferential direction until the elastic member cannot be restored and the first protrusion enters the first slide groove. At this time, the first protrusion is again located at the pressing position of the next bevel tooth, ready to be pressed for the second time to drive the third roller seat to rotate in the circumferential direction.The seal of the present application can change its combination under the action of pressing pressure only by pressing a button, and the adjustment is more convenient and labor-saving; during the rolling use process of the present application, the two rollers rotate synchronously in the circumferential direction, and the process of the protrusion and the inclined surface of the bevel tooth abutting against each other does not require overcoming deformation force and will not cause wear, thereby ensuring that the printed content is not easily distorted and the imprint is neat.

Claims

1. A double roller printing core, characterized in that: The structure of the double roller printing core comprises a first roller seat (1) and a second roller seat (2) which are coaxially arranged, wherein the first roller seat (1) and the second roller seat (2) can rotate relative to each other; a pressing component (a) is arranged in the second roller seat (2), and the pressing component (a) is used to drive the second roller seat (2) to rotate circumferentially relative to the first roller seat (1).

2. The double roller printing core according to claim 1, characterized in that: The pressing assembly (a) comprises a button (3) located at the outer end of the second roller seat (2), a pressing shaft (4) located inside the second roller seat (2), a third roller seat (5) arranged between the pressing shaft (4) and the second roller seat (2), and an elastic member (6) arranged between the pressing shaft (4) and the first roller seat (1); the button (3) abuts against the pressing shaft (4) and can drive the pressing shaft (4) to move axially, and the pressing shaft (4) drives the third roller seat (5) to drive the second roller seat (2) to rotate circumferentially during the axial movement.

3. The double roller printing core according to claim 2, characterized in that: The outer wall of the pressing shaft (4) is provided with a first protrusion (41), and the front end of the third roller seat (5) is provided with a bevel tooth (51), and the first protrusion (41) is used to press against the bevel tooth (51); the inner wall of the second roller seat (2) is provided with a plurality of radially inward convex strips (21), and a first sliding groove (7) for the first protrusion (41) to slide into is formed between two adjacent convex strips (21), and the adjacent end of the convex strip (21) and the bevel tooth (51) has a bevel surface (22) for the first protrusion (41) to press against, and the tip formed by the bevel surface (22) is aligned with the bevel tooth surface of the bevel tooth (51) for the first protrusion (41) to press against.

4. The double roller printing core according to claim 3, characterized in that: The first protrusion (41) is cylindrical and extends radially outward along the outer wall of the pressing shaft (4), and the axis of the cylindrical first protrusion (41) is misaligned with the tooth tip of the helical tooth (51).

5. The double roller printing core according to claim 3, characterized in that: The inclined surfaces on both sides of the tooth tip of the inclined tooth (51) are a small inclined surface (52) on one side and a large inclined surface (53) on the other side, and the first protrusion (41) is used to press against the large inclined surface (53).

6. The double roller printing core according to claim 3, characterized in that: The radial thickness of the bevel teeth (51) matches the radial thickness of the convex strip (21), and the pressing shaft (4) is sleeved in a sliding space formed by the third roller seat (5) and the inner wall of the convex strip (21); the height direction of the first protrusion (41) interferes with the radial direction of the convex strip (21), and the outer end of the first protrusion (41) does not contact the inner wall of the second roller seat (2).

7. The double roller printing core according to claim 5, characterized in that: The inclination direction of the inclination tooth surface of the helical teeth (51) for the first protrusion (41) to abut and press is opposite to the inclination direction of the inclined surface (22) of the convex strip (21) for the first protrusion (41) to abut and press.

8. The double roller printing core according to claim 3, characterized in that: A second protrusion (42) is provided on the side wall of the pressing shaft (4), and a second slide groove (8) for the second protrusion (42) to slide into is provided on the inner walls of the adjacent ends of the first roller seat (1) and the third roller seat (5); when there is no pressing force on the button (3), the second protrusion (42) is respectively arranged in the second slide grooves (8) of the first roller seat (1) and the third roller seat (5); when the button (3) applies pressing force, the second protrusion (42) gradually moves away from the second slide groove (8) of the third roller seat (5) and finally disengages from it.

9. The double roller printing core according to claim 2, characterized in that: A third protrusion (54) is provided on the outer side wall of the third roller seat (5), and a third sliding groove (9) plugging and cooperating therewith is correspondingly provided on the second roller seat (2).

10. The double roller printing core according to claim 8, characterized in that: The first protrusion (41) and the second protrusion (42) are located on the same straight line along the axial direction, and the outer diameter of the outer wall of the pressing shaft (4) where the first protrusion (41) is located is greater than the outer diameter of the outer wall where the second protrusion (42) is located.

11. The double roller printing core according to claim 8, characterized in that: The first sliding groove (7) and the second sliding groove (8) are arranged in alignment along the axial direction.

12. The double roller printing core according to claim 2, characterized in that: The number of helical teeth of the third roller seat (5) is equal to the number of graphics or numbers arranged circumferentially on the outer side of the second roller seat (2), and each time the pressing component (a) is pressed, the graphics or numbers driven to rotate circumferentially and position the second roller seat (2) are axially aligned with the graphics or numbers on the first roller seat (1).

13. The double roller ink core according to claim 1, characterized in that: A first printing pad (10) and a second printing pad (11) are respectively sleeved on the outer walls of the first roller seat (1) and the second roller seat (2); graphics or numbers to be printed are arranged on the first printing pad (10) and the second printing pad (11); and the first printing pad (10) and the second printing pad (11) are used to absorb printing ink.

14. The double roller printing core according to claim 13, characterized in that: An ink storage cavity (101) is further provided in the first roller seat (1), an opening (102) is provided at the outer end of the ink storage cavity (101), a cover (12) is mounted on the opening (102), and a discharge hole (103) communicating with the ink storage cavity (101) is provided on the first roller seat (1), the outer end of the discharge hole (103) being in contact with the printing pad.

15. The double roller printing core according to claim 8, characterized in that: Both ends of the second protrusion (42) in the axial direction are provided with inclined surfaces, and the corresponding notch of the second sliding groove (8) is also provided with an inclined surface.

16. A double roller stamp, characterized in that: The seal comprises the double roller seal core as described in any one of claims 1 to 15.

17. The double roller stamp according to claim 16, characterized in that: The seal comprises a first shell (13) and a second shell (14) which are arranged opposite to each other, and a third shell (15) located below the first shell (13) and the second shell (14); the two ends of the double roller seal core in the axial direction are rotatably connected to the first shell (13) and the second shell (14); the double roller seal core protrudes from a snap-fitting space formed by the first shell (13) and the second shell (14); the third shell (15) is snap-fitted to the first shell (13) and the second shell (14) and encapsulates the protruding portion of the double roller seal core.

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