Knife group mechanism and printer comprising same

Abstract

A knife tackle mechanism and a printer comprising the same are disclosed, the knife tackle mechanism comprises a paper pressing block movably arranged on a machine body, a cutter, a push block and a connecting spring, the paper pressing block is provided with a cutter accommodating cavity, the cutter capable of sliding back and forth along the length direction of the cutter accommodating cavity is arranged in the cutter accommodating cavity, and the connecting spring is connected between the cutter and the paper pressing block. One end of the cutter is connected with a push block; the paper pressing block and the cutter are arranged in the printer shell, and one end of the push block is externally arranged on the outer wall of the printer shell and can slide back and forth relative to the printer shell; the push block is used for pushing the cutter to move towards the paper, and the cutter pushes the paper pressing block to press the paper through the connecting spring and cut the paper. The scheme of the utility model has the advantages that the blade is arranged inside and is not exposed, so that no harm is caused to a human body.

Description

Technical Field

[0001] This application relates to the technical field of printers, and in particular, to a knife group mechanism (built-in type) and a printer containing the same. Background Art

[0002] A thermal printer is a small and portable printing device. The printing roll paper is built into the printer. After printing, the paper is generally cut and separated by a metal paper cutter provided on the printer; however, this metal paper cutter generally has a sharp serrated structure and generally protrudes from the outer surface of the printer in order to achieve effective cutting, with its sharp side facing outward, so there is a risk of hurting people; for example, a thermal printer with integrated interface disclosed in Patent No. CN202020729292.3, the paper cutting device adopted in this patent document is arranged on the front side wall outside the housing, and there will be the above-mentioned risk. Utility Model Content

[0003] In view of the above deficiencies of the prior art, this application provides a built-in knife group mechanism in which the blade is built-in and not exposed, so it will not cause harm to the human body.

[0004] To solve the above technical problems, the technical solution adopted in this application is: a knife group mechanism, the structure of the knife group mechanism includes a paper pressing block, a cutting knife, a pushing block and a connecting spring that are movably arranged on the machine body. A cutting knife accommodating cavity is arranged on the paper pressing block. A cutting knife that can slide back and forth along its length direction is arranged in the cutting knife accommodating cavity. A connecting spring is connected between the cutting knife and the paper pressing block. One end of the cutting knife is connected with a pushing block; the paper pressing block and the cutting knife are both placed inside the printer housing, and one end of the pushing block is externally placed on the outer wall of the printer housing and can slide back and forth relative to the printer housing; the pushing block is used to push the cutting knife towards the paper, and the cutting knife presses the paper through the connecting spring and cuts the paper.

[0005] With the above structure, the cutting knife is pushed by the pushing block along the cutting knife accommodating cavity close to the paper outlet to cut the paper. When paper cutting is not required, the cutting knife retracts into the cutting knife accommodating cavity; the cutting knife and the paper pressing block of this structure are completely built into the printer housing without leakage, so the operation process is safer and will not cause harm to the operator; and the process of cutting the paper only needs to push the pushing block outside the housing, which is simple and convenient to operate. The cutting knife can completely contact and cut the paper, so the paper can be cut more thoroughly and neatly.

[0006] Furthermore, a reset member accommodating cavity for accommodating a connecting spring is provided inside the paper pressing block. A notch for accommodating the connecting spring is provided on the cutter. The connecting spring is located inside the reset member accommodating cavity, with one end thereof abutting against the corresponding end of the reset member accommodating cavity and the other end abutting against the end face of the notch. With this structure, when the cutter is pushed by the pushing block towards the paper outlet direction, the connecting spring is compressed, and at the same time, the paper pressing block is pushed to press and fit with the paper at the paper outlet position. In this way, when the cutter cuts the paper, the stability of the paper position can be maintained, so that the cutting process is smoother and more thorough. In addition, during the above paper cutting process, the connecting spring is also compressed inside the reset member accommodating cavity. After the cutting is completed, the force applied to the pushing block is removed, and the connecting spring will automatically expand and reset at this time, thereby pushing the cutter back to the initial position, away from the paper outlet, waiting for the next cutting operation.

[0007] Furthermore, the cutter accommodating cavity penetrates the paper pressing block along the length direction, and a cutting outlet is formed at the end of the paper pressing block close to the paper outlet. The cutting outlet is for the cutter to extend out. With this structure, the cutter can be fitted inside the main body of the paper pressing block without occupying extra space, and a firm nested connection is formed between the cutter and the paper pressing block to ensure the smoothness of the cutter during operation. When the cutter cuts the paper, it can extend out from the cutting outlet and retract into the cutting outlet when not cutting.

[0008] Furthermore, a soft rubber block is connected to the side wall of the paper pressing block facing the paper. With this structure, soft contact can be achieved between the paper pressing block and the paper. On the one hand, it can avoid damaging the paper. On the other hand, this soft contact can increase the friction between the paper and the soft rubber block, avoiding the displacement of the paper during the cutting process and affecting the cutting effect.

[0009] Furthermore, a clamping interface is provided on the cutter, and a clamping block is provided on the pushing block. The clamping block and the clamping interface are buckled and connected to each other. With this structure, the pushing block and the cutter can be connected, so that a force is applied to the part of the pushing block outside the printer housing, thereby driving the cutter to move towards the paper outlet side together, and then realizing the paper cutting action.

[0010] Furthermore, a support column is provided at the outer end of the cutter away from the paper outlet inside the printer housing. A support groove is provided on the support column. The cutter is placed in the support groove. With this structure, the cutter can be supported by the support groove to ensure the smoothness of the cutter and make it more accurate during the paper cutting and retracting and resetting processes.

[0011] Further, a return spring is provided between the paper pressing block and the printer housing, with one end of the return spring connected to the side of the paper pressing block close to the push block and the other end connected to the support column. With this structure, when the push block drives the cutter towards the paper outlet direction, the return spring is stretched and deformed. When the external force on the push block is removed, the return spring contracts and resets, thereby driving the paper pressing block and the cutter to reset.

[0012] Further, the paper pressing block includes a first extension wall forming a cutter accommodation cavity and a second extension wall perpendicularly connected to the first extension wall. The soft rubber block is disposed on the outer wall of the second extension wall close to the paper outlet side. With the above structure, it can not only achieve the nesting accommodation of the cutter but also effectively press the paper for convenient paper cutting.

[0013] Further, a first baffle and a second baffle are provided inside the printer housing. An accommodation groove for accommodating the paper pressing block is formed between the first baffle, the second baffle and the housing, and the second extension wall can abut against the second baffle. With this structure, the position of the paper pressing block can be accurately limited. At the same time, the second extension wall can abut against the second baffle, so that the position of the paper pressing block can be limited during its retraction process, avoiding difficult reset caused by excessive retraction.

[0014] The present application also provides a printer, which includes the cutter group mechanism described above. The printer adopting the above cutter group mechanism can directly drive the cutter to cut the paper through the push block, making the paper cutting more accurate and thorough. Moreover, the cutter of this printer is built-in, reducing the risk of harm to the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Structural schematic diagram of the first view of the cutter group mechanism of the present application.

[0016] Figure 2 Structural schematic diagram of the second view of the cutter group mechanism of the present application.

[0017] Figure 3 Structural schematic diagram of the third view of the cutter group mechanism of the present application.

[0018] Figure 4 Structural schematic diagram of the first view of the exploded view of the cutter group mechanism of the present application.

[0019] Figure 5 Structural schematic diagram of the second view of the exploded view of the cutter group mechanism of the present application.

[0020] Figure 6 Structural schematic diagram of the cross-sectional view of the printer housing of the present application.

[0021] Figure 7Schematic structural diagram of the knife set mechanism visible inside the printer housing of the present application.

[0022] Figure 8 Schematic structural diagram of the printer housing of the present application.

[0023] Figure 9 Schematic structural diagram of the first view of the printer of the present application.

[0024] Figure 10 Schematic structural diagram of the second view of the printer of the present application.

[0025] As shown in the attached drawings: 1. Paper outlet, 2. Paper pressing block, 201. Knife blade accommodation cavity, 202. Reset member accommodation cavity, 203. Knife outlet, 204. First extension wall, 205. Second extension wall, 3. Knife blade, 301. Notch, 302. Clamping interface, 4. Pusher block, 401. Clamping block, 402. Buckle, 403. Connecting column, 404. Connecting hole, 5. Connecting spring, 6. Printer housing, 601. Support column, 602. Support groove, 603. First baffle, 604. Second baffle, 605. Accommodation groove, 7. Soft rubber block, 8. Reset spring. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the embodiments and the attached drawings. Obviously, the described embodiments are only preferred embodiments, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0027] In addition, it should be noted that: when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be another intermediate component for fixing through the intermediate component. When a component is considered to be "connected" to another component, it can 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 "disposed on" another component, it can be directly disposed 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 only for the purpose of illustration. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] As attached Figures 1-5As shown, a knife set mechanism of the present application. The structure of the knife set mechanism includes a paper pressing block 2, a cutting knife 3, a pushing block 4, and a connecting spring 5 that are movably arranged on the machine body. A cutting knife accommodating cavity 201 is provided on the paper pressing block 2. A cutting knife 3 that can slide back and forth along its length direction is arranged in the cutting knife accommodating cavity 201. The connecting spring 5 is connected between the cutting knife 3 and the paper pressing block 2. One end of the cutting knife 3 is connected with a pushing block 4. The paper pressing block 2 and the cutting knife 3 are both placed inside the printer housing 6. One end of the pushing block 4 is externally placed on the outer wall of the printer housing 6 and can slide back and forth relative to the printer housing 6. The pushing block 4 is used to push the cutting knife 3 towards the paper. The cutting knife 3 pushes the paper pressing block 2 to press the paper through the connecting spring 5. Specifically, during the paper pressing process, the connecting spring is compressed and has an elastic restoring force, so as to push the paper pressing block to press the paper tightly, and enable the cutting knife to cut the paper. The external placement of part of the pushing block facilitates its operation, and the built-in cutting knife is not exposed and will not cause harm to the operator. The above-mentioned machine body can specifically be the machine body of the printer or the housing of the printer.

[0029] With the above structure, the pushing block is used to push the cutting knife along the cutting knife accommodating cavity towards the paper outlet to cut the paper. When paper cutting is not required, the cutting knife retracts into the cutting knife accommodating cavity. The cutting knife and the paper pressing block of this structure are completely built inside the printer housing without leakage. Therefore, the operation process is safer and will not cause harm to the operator. And the process of cutting the paper only needs to push the pushing block outside the printer housing, which is simple and convenient to operate. The cutting knife can completely contact and cut the paper, so the paper can be cut more thoroughly and neatly.

[0030] As shown in the appendix Figures 1-3As shown in FIGS. 4 and 5, a reset member accommodation cavity 202 for accommodating a connecting spring 5 is provided inside the paper pressing block 2 of the present application. The reset member accommodation cavity 202 communicates with the cutter accommodation cavity 201, and the inner contour of the reset member accommodation cavity 202 is adapted to the connecting spring 5, facilitating its installation; the extended end face of the reset member accommodation cavity is on the inner side of the paper pressing block and does not extend to the paper outlet, facilitating the abutment of the reset spring. A notch 301 for accommodating the connecting spring 5 is provided on the cutter 3. Specifically, the notch is a through-hole structure provided on the cutter blade surface, the through-hole extends along the running direction of the cutter, and the end of the through-hole away from the paper is located outside the paper pressing block when the connecting spring is not under external force; the connecting spring 5 is located inside the reset member accommodation cavity 202, one end thereof abuts against the corresponding end of the reset member accommodation cavity 202, and the other end abuts against the end face of the notch 301; that is, one end of the connecting spring close to the paper outlet 1 abuts against the corresponding end of the reset member accommodation cavity, and the other end abuts against the corresponding end of the notch; with this structure, when the cutter is pushed by the push block to run towards the paper outlet direction, the connecting spring is compressed, and at the same time, it will push the paper pressing block to make it tightly fit with the paper, so that when the cutter cuts the paper, the stability of the paper position can be maintained, and the cutting process can be smoother and more thorough; in addition, during the above paper cutting process, the connecting spring will also be compressed inside the reset member accommodation cavity. After the cutting is completed, the force on the push block is removed, and the connecting spring will automatically expand and reset at this time, thereby pushing the cutter back to the initial position, away from the paper outlet, waiting for the next cutting operation.

[0031] As shown in the attached Figures 4-5 figures, the cutter accommodation cavity 201 of the present application penetrates through the paper pressing block 2 along the length direction, and a paper outlet 203 is formed at the end of the paper pressing block 2 close to the paper outlet 1, and the paper outlet 203 is for the cutter 3 to extend out; with this structure, the cutter can be fitted inside the paper pressing block body without occupying extra space, and a firm nested connection is formed with the paper pressing block, ensuring the smoothness of the cutter running process; when the cutter cuts the paper, it can extend out from the paper outlet, and when not cutting, it retracts into the paper outlet.

[0032] As shown in the attached Figures 4-5 figures, a soft rubber block 7 is connected to the outer wall of the paper pressing block 2 on the side close to the paper outlet 1. It can be a flexible plastic part. Specifically, the soft rubber block can be connected to the corresponding outer wall of the paper pressing block by bonding, or a groove can be provided on the corresponding outer wall of the paper pressing block to snap-connect the soft rubber block; with this structure, soft contact can be achieved between the paper pressing block and the paper through the soft rubber block. On the one hand, it can avoid damaging the paper, and on the other hand, this soft contact can make the friction between the paper and the soft rubber block large, avoiding the displacement of the paper during the cutting process and affecting the cutting effect.

[0033] As shown in the attached Figures 1-5As shown in the figure, a card interface 302 is provided on the cutter 3 of the present application. A clamping block 401 is provided on the push block 4. The clamping block is arranged on the inner side wall in the thickness direction of the push block, and the outer side wall is a force application part for applying force to drive it. The clamping block 401 is buckled and connected with the card interface 302. With this structure, the push block and the cutter can be connected, so that a force can be applied to the part of the push block outside the printer housing, thereby driving the cutter to move together towards the paper outlet side, and then realizing the paper cutting action.

[0034] More specifically, as shown in the attached Figures 1-5 figure, the clamping block 401 of the present application includes buckles 402 symmetrically arranged up and down and a connecting column 403 located between the symmetric buckles 402. There are two connecting columns symmetrically arranged horizontally left and right. The buckle 402 is buckled with the card interface 302. Specifically, the buckle passes over the card interface and abuts and buckles with the outer surface of the corresponding side of the cutter. A connecting hole 404 is provided on the connecting column 403, and the connecting hole 404 is used for connecting with a screw. With this structure, the first fixation can be achieved by buckling the buckle with the card interface, and then by setting a screw in the connecting hole, the screw abuts against the cutter to achieve the second fixation, or a contact piece can be fixed between the screw and the cutter to also achieve the fixed connection, so as to more firmly connect the cutter and the push block and realize the stable linkage of the two.

[0035] As shown in the attached Figures 7-8 figure, a support column 601 is provided at the outer end of the cutter 3 in the printer housing 6 away from the paper outlet 1. A support groove 602 is provided on the support column 601. The width of the support groove is adapted to the thickness of the cutter. The cutter 3 is placed in the support groove 602. That is, there is a certain distance between the support column and the tail end of the paper pressing block. With this structure, the position of the cutter near the tail end can be supported by the support groove to ensure the smooth operation of the cutter. During the paper cutting and retracting and resetting processes, the tail end of the cutter is always supported by the support groove, so it runs more accurately and smoothly.

[0036] As shown in the attached Figures 6-8 figure, a return spring 8 is provided between the paper pressing block 2 and the printer housing 6 of the present application. The return spring can be set as a tension spring structure, and one end of the return spring 8 is connected to the side of the paper pressing block 2 close to the push block 4, and the other end is connected to the support column 601. Specifically, through holes for hooking the corresponding ends of the return spring are provided on the corresponding ends of the paper pressing block and the support column, and hooks are provided at both ends in the length direction of the return spring to hook into the through holes. With this structure, when the push block drives the cutter to move towards the paper outlet direction, the return spring is stretched and deformed, and when the external force on the push block is removed, the return spring contracts and resets, thereby driving the paper pressing block and the cutter to reset.

[0037] As shown in the attachedFigures 1-5 , as shown in FIGS. 7-9, the paper pressing block 2 described in the present application includes a first extended wall 204 forming a cutter accommodating cavity 201, and a second extended wall 205 perpendicularly connected to the first extended wall 204. The soft rubber block 7 is disposed on the outer wall of the second extended wall 205 close to the paper outlet 1 side. With the above structure, it can not only realize the fitting and accommodation of the cutter, but also effectively press the paper, facilitating paper cutting.

[0038] As shown in the attached Figures 7-9 figures, in the printer housing 6 described in the present application, a first baffle 603 and a second baffle 604 are provided. An accommodation groove 605 for accommodating the paper pressing block 2 is formed between the first baffle 603, the second baffle 604 and the printer housing 6, and the second extended wall 205 can abut against the second baffle 604. Or rather, the second extended wall 205 is closer to the paper outlet 1 side relative to the second baffle 604, that is, the second extended wall crosses the second baffle and is closer to the paper outlet side. With this structure, the position of the paper pressing block can be accurately limited. At the same time, the second extended wall can abut against the second baffle, that is, the second extended wall is located on the side close to the paper outlet, and the second baffle is located on the rear side of the second extended wall close to the push block side. In this way, the position of the paper pressing block during its retraction process can be limited, avoiding difficult reset caused by excessive retraction.

[0039] As shown in the attached Figures 9-10 figures, the present application also provides a printer. This printer includes the knife set mechanism described above in the present application. The printer adopting the above knife set mechanism can directly drive the cutter to cut the paper through the push block, making the paper cutting more accurate and thorough. Moreover, the cutter of this printer is built-in, reducing the risk of harm to the operator. Specifically, this printer includes a fixed housing below and a rotating housing rotatably connected to the fixed housing. The rotating housing rotates relative to the fixed housing to achieve covering and opening actions. The internal structures of the thermal printer such as the printing roll paper, the print head and the knife set mechanism in the present application are all arranged in the fixed housing below, and are sealed by covering the fixed housing with a middle shell. A long hole is provided on the outer wall of the fixed housing of the printer of the present application. The locking buckle of the push block passes through the long hole and is buckled and connected with the inner cutter. The extending length of the long hole is greater than the extending length of the locking buckle so that the push block can slide back and forth to realize the driving and reset actions of the cutter. The connecting spring of the present application can adopt a straight spring structure, and the reset spring is a tension spring structure. The printer of the present application is similar to the existing thermal printers, and both rely on the motor to drive the gear set and the rubber roller to rotate. The print head is close to the rubber roller and presses the paper for printing. The innovation point is that the original printer uses a metal paper tearing knife, which has serrations and protrudes from the outer surface of the housing, so its sharp side faces outward. The present application drives the built-in cutter through the push block. The cutter is not exposed to the outside, is not easy to hurt people, and has a remarkable paper cutting effect.

[0040] For the printer with the built-in knife set mechanism of this application, its specific working principle and process are as follows: First, the soft rubber block and the paper pressing block are fixedly bonded by back glue. The cutting knife and the paper pressing block are sleeved together, and the connecting spring is abutted between the reset part accommodating cavity and the notch. The pushing block is connected to the clamping interface of the cutting knife through the clamping buckle, and the two are more firmly fixedly connected through the connecting column. The combined paper pressing block is arranged in the accommodating groove, and the tail end of the cutting knife is placed in the supporting groove to be supported. The pushing part of the pushing block is exposed outside the outer wall of the housing to facilitate the application of the driving force. The pushing block can slide back and forth along the housing, that is, run along the cutting direction of the cutting knife, so as to drive and reset the cutting knife. When the pushing block is pushed towards the paper outlet side, the cutting knife is driven to run on the same side. The connecting spring is compressed to push the paper pressing block, so that the soft rubber block on it presses the paper tightly. The pushing block continues to push the cutting knife across the paper outlet to cut the paper. During the above process, the connecting spring is compressed and the reset spring is stretched. During reset, the pushing block is released and not stressed. Under the action of the elastic extension and reset of the connecting spring and the retraction force of the reset spring, the pushing block and the cutting knife are driven to retract to the initial position to achieve reset and wait for the next cutting.

Claims

1. A knife assembly mechanism, characterized in that: The invention comprises a paper pressing block (2), a cutter (3), a push block (4) and a connecting spring (5) which are movably arranged on a machine body; the paper pressing block (2) is provided with a cutter accommodating cavity (201); a cutter (3) which can slide back and forth along its length direction is arranged in the cutter accommodating cavity (201); the connecting spring (5) is connected between the cutter (3) and the paper pressing block (2); one end of the cutter (3) is connected to the push block (4); the paper pressing block (2) and the cutter (3) are both arranged in a printer housing (6); one end of the push block (4) is arranged on the outer wall of the printer housing (6) and can slide back and forth relative to the printer housing (6); The pushing block (4) is used to push the cutter (3) to move toward the paper, and the cutter (3) pushes the paper pressing block (2) to press the paper through the connecting spring (5) to cut the paper.

2. The knife assembly mechanism according to claim 1, characterized in that: The paper pressing block (2) is provided with a reset member accommodating cavity (202) for accommodating the connecting spring (5); the cutter (3) is provided with a notch (301) for accommodating the connecting spring (5); the connecting spring (5) is located in the reset member accommodating cavity (202), one end of which abuts against the corresponding end of the reset member accommodating cavity (202), and the other end abuts against the end surface of the notch (301).

3. The knife assembly mechanism according to claim 1, characterized in that: The cutter accommodating cavity (201) passes through the paper pressing block (2) along the length direction, and a cutter outlet (203) is formed at the end of the paper pressing block (2) close to the paper outlet (1), and the cutter (3) is extended from the cutter outlet (203).

4. The knife assembly mechanism according to claim 3, characterized in that: A soft rubber block (7) is connected to a side wall of the paper pressing block (2) facing the paper.

5. The knife assembly mechanism according to claim 1, characterized in that: The cutter (3) is provided with a card interface (302), and the push block (4) is provided with a card connection block (401), and the card connection block (401) and the card interface (302) are mutually buckled and connected.

6. The knife assembly mechanism according to claim 3, characterized in that: A support column (601) is provided in the printer housing (6) at the outer end of the cutter (3) away from the paper outlet (1), and a support groove (602) is provided on the support column (601), and the cutter (3) is placed in the support groove (602).

7. The knife assembly mechanism according to claim 6, characterized in that: A return spring (8) is arranged between the paper pressing block (2) and the printer housing (6), and one end of the return spring (8) is connected to the side of the paper pressing block (2) close to the pushing block (4), and the other end is connected to the support column (501).

8. The knife assembly mechanism according to claim 4, characterized in that: The paper pressing block (2) comprises a first extension wall (204) forming a cutter accommodating cavity (201), and a second extension wall (205) vertically connected to the first extension wall (204), and the soft rubber block (7) is arranged on the outer wall of the second extension wall (205) on a side close to the paper outlet (1).

9. The knife assembly mechanism according to claim 8, characterized in that: A first baffle (603) and a second baffle (604) are provided in the printer housing (6); a receiving groove (605) for receiving the paper pressing block (2) is formed between the first baffle (603), the second baffle (604) and the printer housing (6); and the second extension wall (205) can abut against the second baffle (604).

10. A printer, characterized in that: The printer comprises the knife assembly mechanism described in any one of claims 1 to 9.

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