Seal push-out structure and seal

By using a detachable connection structure of fixed and sliding shells and a stamp assembly design, the problems of large size and ink contamination of existing date stamps are solved, achieving a compact, portable, and clear stamping effect.

CN223702102UActive Publication Date: 2025-12-23四川铁道职业学院
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Patent Information

Application Number
CN202520566029.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-28
Publication Date
2025-12-23
Estimated Expiration
2035-03-28

AI Technical Summary

Technical Problem

The existing date stamp is bulky and inconvenient to carry. Excessive ink on the stamp plate leads to blurry imprints, and it is difficult to print additional information such as names at the same time.

Method used

It adopts a detachable connection structure of fixed shell and sliding shell. The sliding shell is equipped with elastic clip and through hole. With the help of spring push, the printing plate can be dipped in ink without flipping. The date and name information can be adjusted by the switching device, and the ink contamination is avoided by the printing cap assembly.

Benefits of technology

It achieves a compact and portable stamp structure, avoiding the problem of blurry stamps caused by excessive ink on the stamp plate, and can print dates and names at the same time, protecting the stamp plate from contaminating other items.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a seal push-out structure and a seal, and belongs to the technical field of seal devices. The seal push-out structure comprises a fixed shell and a sliding shell, a printing plate is arranged on the outer end face of the sliding shell, the sliding shell is arranged in the fixed shell in a sleeved mode and can move in the direction of the central axis of the fixed shell, an elastic clamping head is arranged on the side wall of the sliding shell, a through hole matched with the clamping head is formed in the fixed shell, and the outer end of the through hole is covered with a first soft rubber film. The side wall of the inner end of the through hole is clamped with the clamping head. A spring is arranged between the inner end face of the sliding shell and the corresponding face in the fixed shell, and after the inner wall of the through hole loses constraint on the clamping head, the spring pushes the sliding shell to move out of the fixed shell. The printing plate does not need to be overturned to dip in printing oil, sliding insertion connection is achieved, the size is small, and carrying is convenient; the gear for adjusting the date is arranged in the fixed shell and is pulled out for adjustment when needed, so that the overall aesthetic feeling is increased; and during stamping, the cover plate shrinks backwards to expose the stamping head with the date, so that two types of information can be stamped at one time.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seal device, in particular to a seal push-out structure and a seal. BACKGROUND

[0002] In the daily work of accounting, finance, tax and other fields, date seals are widely used for identification of bills, vouchers and other documents to ensure the accuracy and traceability of records.

[0003] At present, the common date seals mainly have two structural forms: one is a structure in which the printing plate moves up and down and flips when stamping, and the overall volume of this structure is large; the other is a fixed structure, which adjusts the date manually through exposed gears, and is not only not beautiful in appearance, but also difficult to stamp additional information such as names at the same time. In addition, due to the limitation of the push-out mode, the overall volume of these two types of seals is large, which is not convenient to carry.

[0004] For the structure in which the printing plate and the printing pad are separated, the printing plate with ink is easy to contaminate other objects when stored; and for the flip structure, the printing plate will be in close contact with the printing pad embedded in the printing pad after each use, resulting in that the printing plate dips too much ink, so that the stamped information is blurred. Therefore, it is urgent to improve the push-out structure and the way of dipping ink of the existing date seal. SUMMARY

[0005] The present application provides a seal push-out structure and a seal, which can overcome at least one or more problems existing in the prior art.

[0006] In a first aspect of the present application, a seal push-out structure is provided, which comprises a fixed shell and a sliding shell, an outer end surface of the sliding shell is provided with a printing plate for stamping information, the sliding shell is sleeved in the fixed shell, and the two are detachably connected, the sliding shell can move along the central axis direction of the fixed shell, wherein a clamping head with elasticity is arranged on the side wall of the sliding shell, a through hole adapted to the clamping head is arranged on the fixed shell, the outer end of the through hole is covered with a first soft rubber film, and the inner end side wall of the through hole is clamped with the clamping head.

[0007] In a possible implementation, a spring is arranged between the inner end surface of the sliding shell and the corresponding surface in the fixed shell, and when the inner wall of the through hole loses the constraint of the clamping head, the spring pushes the sliding shell to move outward relative to the fixed shell.

[0008] In a possible implementation, an exchange device for adjusting the stamped information (date) is installed in the sliding shell, a plurality of rotatable printing heads are arranged on the exchange device, a window with a size adapted to the row of printing heads is arranged on the printing plate, and the printing heads close to the printing plate are arranged with a gap from the window of the printing plate.

[0009] When the sliding shell moves into the fixed shell, the exchange device is clamped with the inner wall of the fixed shell.

[0010] When the sliding shell moves further into the fixed shell, the printing head on the exchange device near the window exceeds the printing plate and is flush with the information on the printing plate.

[0011] In one possible implementation, a retreat groove is provided between the through hole and the inner end face of the fixed shell, and the retreat groove can allow the card head to pass without being compressed.

[0012] In one possible implementation, at least one clamping strip is provided on the inner wall of the fixed shell, and a positioning end that can be fitted with the outer end of the clamping strip is provided on the exchange device; after the card head on the sliding shell is clamped with the through hole on the fixed shell, when the sliding shell moves further into the fixed shell, the clamping strip limits the movement of the exchange device along with the sliding shell.

[0013] In one possible implementation, the sliding shell includes a shell and a printing plate, and the shell further includes an adjusting opening that allows a finger to enter the interior of the shell.

[0014] In one possible implementation, a strip-shaped groove is provided on the sliding shell corresponding to the clamping strip of the fixed shell.

[0015] In one possible implementation, the exchange device includes a frame body, a rotating shaft, a rotating block, a rotating belt, a first hand wheel, and a second hand wheel; at least two parallel rotating shafts are rotatably connected in the frame body, a plurality of rotating blocks are rotatably connected on the rotating shafts, a tensioned rotating belt is sleeved on the outer circumferences of the corresponding rotating blocks on the two rotating shafts, and a plurality of printing heads are provided on the rotating belt; wherein, a first hand wheel is provided on the outer end face of the rotating block on the outer side, a second hand wheel is provided on the side end face of the rotating block on the inner side, and the rotating shafts pass through the centers of the first hand wheel and the second hand wheel.

[0016] In one possible implementation, the diameter of the first hand wheel is smaller than the diameter of the second hand wheel.

[0017] In one possible implementation, the inner end face of the frame body abuts against the inner face of the sliding shell, and the sliding shell can drive the frame body to move when the sliding shell moves outwards relative to the fixed shell; and a positioning end is provided on the side face of the frame body towards the clamping strip on the fixed shell.

[0018] Compared with the prior art, the utility model has the following beneficial effects: a printing seal push-out structure is realized through the cooperation of the fixed shell, the sliding shell, and the spring, the printing plate does not need to be flipped to dip printing ink, and the sliding shell is connected in a small and compact size and is convenient to carry; the gear (first hand wheel and second hand wheel) for adjusting the date is in the fixed shell, and the gear is extracted for adjustment when needed, thereby increasing the overall aesthetic feeling; when the seal cover is printed, the seal cover is retracted backwards, the printing head with the date is exposed, and two types of information, i.e., the date and the name, can be printed at one time.

[0019] The second aspect of the application also provides a printing seal, which includes the printing seal push-out structure, and an ink cover set is detachably connected to one end of the printing plate of the printing seal push-out structure.

[0020] In a possible implementation manner, the stamp cover set comprises a stamp cover, a movable plate and a top cover, one side of the stamp cover is connected with the stamp plate, and the other side of the stamp cover is connected with the top cover, the movable plate is arranged on the stamp cover towards the stamp plate, the movable plate is provided with an ink pad, and the movable plate is pushed towards the stamp plate when the movable plate is pushed by an external force on one side of the top cover, and the movable plate pushes the sliding shell to move, so that the stamp head at the window is in contact with the ink pad.

[0021] In a possible implementation manner, a through hole is arranged at the center of the stamp cover, the movable plate is connected with the through hole through a colloid head, the colloid head is elastic and can be restored after being stretched, one side of the colloid head is clamped and fixed by the top cover and the stamp cover, and the colloid head is provided with an oiling hole at the center.

[0022] In a possible implementation manner, the side of the movable plate towards the ink pad is provided with a plurality of radial shallow grooves, and all the shallow grooves are in communication with the oiling hole.

[0023] In a possible implementation manner, the top cover is provided with a second soft rubber film, the side of the second soft rubber film towards the movable plate is provided with a top head, the middle part of the colloid head is in a cylindrical shape, the center is the oiling hole, and the top head is inserted into the oiling hole and abuts against the movable plate.

[0024] In a possible implementation manner, the first soft rubber film and the second soft rubber film are both made of rubber and are elastic.

[0025] In a possible implementation manner, when the colloid head is in a natural state, the ink pad and the characters on the stamp plate are arranged with a gap, and the clamping head does not exceed the window.

[0026] In a possible implementation manner, a plurality of sliding strips extending in the moving direction of the sliding shell are arranged on the inner wall of the fixed shell, and a sliding groove matched with the sliding strips is arranged on the sliding shell.

[0027] In a possible implementation manner, at least one arc-shaped recess matched with a finger is arranged on the fixed shell.

[0028] Compared with the prior art, the stamp (i.e. the stamp cover) protects the stamp plate and avoids that the ink on the stamp plate pollutes other objects, the stamp cover set can dip the ink on the stamp plate manually when needed, so that the characters are not blurred due to being forced to dip the ink after each use, and the ink pad does not need to be taken out, so that the ink does not pollute other objects.

[0029] It should be noted that the various possible implementation manners of any one of the aspects can be combined on the premise that the schemes are not contradictory. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1This is a schematic diagram of the structure of a seal provided in an embodiment of this application.

[0031] Figure 2 This is an exploded view of a stamp ejection structure provided in an embodiment of this application.

[0032] Figure 3 This is a cross-sectional view of a stamp ejection structure provided in an embodiment of this application.

[0033] Figure 4 yes Figure 3 A schematic diagram of the fixed shell structure.

[0034] Figure 5 yes Figure 3 A schematic diagram of the sliding shell structure.

[0035] Figure 6 yes Figure 3 A schematic diagram of the sliding shell from another angle.

[0036] Figure 7 yes Figure 2 Exploded view of the Sino-Indian cover group.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Fixed shell; 11. Sliding strip; 111. Recessed groove; 12. Locking strip; 13. First soft rubber film; 14. Recessed part; 20. Sliding shell; 21. Printing plate; 211. Window; 22. Frame shell; 221. Locking head; 222. Sliding groove; 23. Adjustment port; 231. Strip groove; 24. Spring; 31. Frame body; 311. Positioning end; 32. Rotating shaft; 33. Rotating block; 34. Rotating belt; 341. Print head; 35. First handwheel; 36. Second handwheel; 40. Print cover assembly; 41. Printing pad cover; 411. Punch; 42. Movable plate; 421. Printing pad; 422. Glue head; 4221. Oiling hole; 43. Top cover; 431. Second soft rubber film; 432. Top head. Detailed Implementation

[0039] The present application will now be described with reference to the accompanying drawings, which illustrate several embodiments of the present application. However, it should be understood that the present application can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present application more complete and to fully illustrate the scope of protection of the present application to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0040] On the one hand, embodiments of this application provide a seal ejection structure, which can be referred to in conjunction with the following: Figure 2 and Figure 3The stamp ejection structure includes a fixed shell 10 and a sliding shell 20. The outer end face of the sliding shell 20 is provided with a stamp plate 21 for stamping information. The sliding shell 20 is fitted inside the fixed shell 10, and the two are detachably connected. The sliding shell 20 can move along the central axis of the fixed shell 10.

[0041] The sliding shell 20 has a flexible locking head 221 on its side wall, and the fixed shell 10 has a through hole adapted to the locking head 221. The outer end of the through hole is covered with a first soft rubber film 13, and the inner end side wall of the through hole is engaged with the locking head 221. There can be two locking heads 221, symmetrically arranged on both sides of the sliding shell 20, and there are also two corresponding through holes and two first soft rubber films 13 on them.

[0042] In one possible implementation, a spring 24 is provided between the inner end face of the sliding shell 20 and the corresponding face inside the fixed shell 10. After the inner wall of the through hole loses its constraint on the locking head 221, the spring 24 pushes the sliding shell 20 to move outward from the fixed shell 10.

[0043] To increase the sliding stability between the fixed shell 10 and the sliding shell 20, the inner wall of the fixed shell 10 is provided with a plurality of slide bars 11 extending in the moving direction of the sliding shell 20, and the sliding shell 20 is provided with corresponding slide grooves 222 on the slide bars 11.

[0044] To increase comfort when stamping, the retaining shell 10 is provided with at least one arc-shaped recess 14 adapted to the finger.

[0045] In scenarios such as accounting and financial document review, contract payment approval, accounting file management, tax declaration, auditing, banking business and payroll, the seal must bear a time mark to ensure that the financial process is compliant, the time is clear, and the responsibility is traceable.

[0046] An adjustable date-printing device is installed inside the sliding housing 20. Please refer to the attached document for further details. Figure 5 and Figure 6 The replacement device is common in the prior art and will be described in detail below. The replacement device is equipped with several rotatable print heads 341. The print plate 21 is equipped with a window 211 that matches the size of a row of print heads 341 (capable of imprinting date information). After rotation, the print heads 341 near the print plate 21 maintain a gap with the outer end face of the print plate 21 to avoid interference between the rotating print heads 341 and the print plate 21. After the sliding shell 20 moves into the fixed shell 10, the replacement device is fixedly connected to the inner wall of the fixed shell 10. When the sliding shell 20 moves further into the fixed shell 10, the print heads 341 near the window 211 on the replacement device extend beyond the print plate 21 and are flush with the imprint information on the print plate 21. During this process, the spring 24 is further compressed.

[0047] To allow the sliding housing 20 to move further into the fixed housing 10, a recessed groove 111 is provided on the fixed housing 10 between the through hole and the inner end face of the fixed housing 10. (See [link to relevant documentation]). Figure 4 The recess 111 allows the card head 221 to pass through without being compressed, which ensures that the sliding shell 20 can move further into the fixed shell 10, so that the print head 341 at the front end of the switching device connected to the fixed shell 10 is exposed on the print plate 21.

[0048] In order to prevent the switching device from moving further along with the sliding shell 20 when it moves further into the fixed shell 10, Figure 4 The inner wall of the fixed shell 10 shown is provided with at least one locking strip 12, and the switching device is provided with a positioning end 311 that can be adapted to the outer end of the locking strip 12. After the locking head 221 on the sliding shell 20 is connected to the through hole on the fixed shell 10, when the sliding shell 20 moves further into the fixed shell 10, the locking strip 12 restricts the switching device from moving further with the sliding shell 20.

[0049] To facilitate the installation of the adjustment device into the sliding shell 20, the sliding shell 20 includes a frame shell 22 and a printing plate 21. After the adjustment device is inserted into the frame shell 22, the frame shell 22 and the printing plate 21 are ultrasonically welded. The replacement device requires rotating the printing head 341. The frame shell 22 is also provided with an adjustment port 23 that allows fingers to be inserted into the frame shell 22.

[0050] In order to make the sliding shell 20 have more contact with the inner wall of the fixed shell 10 and not interfere with the retaining strip 12, a strip groove 231 is provided on the sliding shell 20 at the position corresponding to the retaining strip 12 of the fixed shell 10.

[0051] The switching device includes a frame 31, rotating shafts 32, rotating blocks 33, rotating belts 34, a first handwheel 35, and a second handwheel 36. At least two parallel rotating shafts 32 are rotatably connected to the frame 31. Several rotating blocks 33 are rotatably connected to the rotating shafts 32. A rotating belt 34 is fitted around the outer periphery of two corresponding rotating blocks 33 on the two rotating shafts 32. Several imprint heads 341 are provided on the rotating belt 34. The imprint heads 341 may display year numbers, month numbers, date numbers, or other imprint information. The switching device involved in this application differs from the prior art in that the outer end face of the outer rotating block 33 is provided with a first handwheel 35, and the side end faces of the several inner rotating blocks 33 are provided with second handwheels 36. (See reference...) Figure 6 The pivot 32 passes through the center of the first handwheel 35 and the second handwheel 36.

[0052] The inner end face of the frame 31 abuts against the inner surface of the frame shell 22. When the frame shell 22 moves outward from the fixed shell 10, it can drive the frame 31 to move.

[0053] The frame 31 has a positioning end 311 on the side facing the locking strip 12 on the fixed shell 10. When the frame 22 continues to move into the fixed shell 10, the frame 31 is limited by the locking strip 12 and will not continue to move into the fixed shell 10. In this way, the print head 341 located at the window 211 of the printing plate 21 will be exposed.

[0054] Secondly, embodiments of this application provide a seal; please refer to [link / reference]. Figure 1 The stamp includes the stamp ejection structure described above, and a stamp cover assembly 40 is detachably connected to one end of the stamp plate 21 of the stamp ejection structure.

[0055] Please see Figure 7 The stamp assembly 40 includes an ink pad cover 41, a movable plate 42, and a top cover 43. One side of the ink pad cover 41 is engaged with the printing plate 21 or the fixed shell 10, and the other side is engaged with the top cover 43 (inverted). The movable plate 42 is provided inside the ink pad cover 41 facing the printing plate 21. An ink pad 421 is provided on the movable plate 42. When the movable plate 42 is pushed by an external force from the top cover 43, it moves toward the printing plate 21 and pushes the printing plate 21 (sliding shell 20) to move, so that the stamp head 341 at the window 211 contacts the ink pad 421.

[0056] For details, please refer to Figure 3 The ink pad cover 41 has a through-hole 411 in the center. The movable plate 42 is connected to the through-hole 411 through the colloid head 422. The movable plate 42 is made of hard resin material, and the colloid head 422 is made of soft rubber material. The two are integrally injection molded. The colloid head 422 is elastic and can recover after being stretched. One side of the colloid head 422 is clamped and fixed by the top cover 43 and the ink pad cover 41. The center of the colloid head 422 has an oil inlet 4221. The movable plate 42 has radial shallow grooves on the side facing the ink pad 421. All shallow grooves are connected to the oil inlet 4221. The ink added through the oil inlet 4221 can more easily diffuse to a farther place on the ink pad 421 under the capillary action, making the ink on the ink pad 421 more uniform.

[0057] The top cover 43 is provided with a second soft rubber film 431. The second soft rubber film 431 is provided with a top head 432 on the side facing the movable plate 42. The middle part of the rubber head 422 is cylindrical, with an oil hole 4221 in the center. It is set along the inner wall of the punch hole 411. The top head 432 is inserted into the oil hole 4221 and abuts against the movable plate 42.

[0058] Both the first soft rubber film 13 and the second soft rubber film 431 are made of rubber and are elastic.

[0059] How to use:

[0060] 1. Adding ink: The top cover 43 and the ink pad cover 41 are connected by a snap-fit ​​joint. Open the top cover 43 and add ink to the ink hole 4221 of the movable plate 42. The ink flows to the ink pad 421 through the central hole of the movable plate 42. Due to the capillary effect of the shallow groove of the movable plate 42, the ink can flow to the outer edge of the ink pad 421 more quickly. Snap the top cover 43 back on. Ink only needs to be added once a period of time.

[0061] 2. Adjusting the time: Press the first soft rubber film 13 with two fingers, and the clip 221 will be released from the constraint of the through hole side wall on the fixed shell 10. The elastic force of the spring 24 will push the sliding shell 20 to move a distance away from the fixed shell 10, increasing the sense of ceremony and the area that the fingers can hold the sliding shell 20. Hold it with two fingers and gently pull out the sliding shell 20 until the first handwheel 35 is visible.

[0062] The first handwheel 35 has a toothed protrusion at the outward end, which makes it easy for a fingernail to be inserted and rotated. The first handwheel 35 will drive the rotating block 33 in contact with it. The corresponding rotating blocks 33 on the two rotating shafts 32 are covered with a tensioned rotating belt 34. When one end of the rotating block 33 rotates, it drives the other end of the rotating block 33 to rotate through friction. The printing head 341 on the rotating belt 34 will then rotate. The required information is adjusted to face the window 211 of the printing plate 21 by rotation.

[0063] Due to the design of other structures, the second handwheel 36 is located inside the first handwheel 35, making it inconvenient to insert fingers. The diameter of the first handwheel 35 is smaller than the diameter of the second handwheel 36, and the adjustment port 23 on the housing 22 is larger at the corresponding location of the second handwheel 36. The principle of adjusting the information of the locking head 221 on the corresponding rotating belt 34 by rotating the second handwheel 36 is the same as above.

[0064] After adjusting the year, month, and day (both numerical parts) to the correct date, push the sliding shell 20 into the fixed shell 10. A "click" sound indicates that the clip 221 is engaged in the through groove of the fixed shell 10, with the outer end face of the clip 221 abutting against the inner surface of the first soft rubber film 13.

[0065] 3. Applying ink: Press the second soft rubber film 431, the top head 432 pushes the movable plate 42 toward the printing plate 21, and pushes the printing plate 21 (sliding shell 20) into the fixed shell 10. The spring 24 is compressed, the fixed shell 10 limits the movement of the changing device in the sliding shell 20, and the printing head 341 on the changing device extends out of the window 211 on the printing plate 21, so that the characters on the printing plate 21 and the characters on the printing head 341 are both coated with ink.

[0066] When the external force (finger force) on the second soft film 431 is removed, the gel head 422 pulls the movable plate 42 back to its original position under its own restoring force, with a gap between it and the characters on the printing plate 21. The restoring force of the spring 24 causes the sliding shell 20 to return to its original position (the clip 221 is inserted into the through hole on the fixed shell 10), and the printing head 341 "sinks" into the window 211.

[0067] 4. Stamping: Remove the stamp assembly 40, face the stamp plate 21 toward the area of ​​the paper to be stamped, press down on the fixed shell 10. The stamp plate 21 is under pressure, the sliding shell 20 moves further into the fixed shell 10, the card head 221 moves into the retraction groove 111 of the fixed shell 10, the positioning end 311 on the frame 31 of the switching device is constrained by the card strip 12 in the fixed shell 10, the stamp head 341 on the switching device does not move, as the stamp head 341 extends out of the window 211 and contacts the paper, the original stamp plate 21 has already contacted the paper, and the information from both places is stamped on the paper, the sliding shell 20 can no longer move into the fixed shell 10;

[0068] After stamping, pick up the stamp. Under the restoring force of the spring 24, the sliding shell 20 moves outward from the fixed shell 10. A "click" sound is heard, indicating that the sliding shell 20 has been reset.

[0069] While exemplary embodiments of this application have been described, those skilled in the art will understand that various changes and modifications can be made to the exemplary embodiments of this application without departing from the spirit and scope thereof. Therefore, all changes and modifications are included within the scope of protection of this application as defined by the claims. This application is defined by the appended claims, and equivalents of those claims are also included.

Claims

1. A stamp ejection structure, comprising a fixed shell (10) and a sliding shell (20), wherein the outer end face of the sliding shell (20) is provided with a stamp plate (21) for stamping information, the sliding shell (20) is sleeved inside the fixed shell (10), the two are detachably connected, and the sliding shell (20) can move along the central axis of the fixed shell (10), characterized in that, The sliding shell (20) has an elastic locking head (221) on its side wall, and the fixed shell (10) has a through hole that is adapted to the locking head (221). The outer end of the through hole is covered with a first soft rubber film (13), and the inner end side wall of the through hole is engaged with the locking head (221). A spring (24) is provided between the inner end face of the sliding shell (20) and the corresponding face inside the fixed shell (10). When the inner wall of the through hole loses its constraint on the locking head (221), the spring (24) pushes the sliding shell (20) to move outward from the fixed shell (10).

2. The seal ejection structure according to claim 1, characterized in that, The sliding shell (20) is equipped with an adjustable stamping information switching device. The switching device is provided with a number of rotatable stamp heads (341). The stamp plate (21) is provided with a window (211) that is adapted to the size of a row of stamp heads (341). The stamp heads (341) near the stamp plate (21) are set with a gap between them and the window (211) of the stamp plate (21). After the sliding shell (20) moves into the fixed shell (10), the switching device engages with the inner wall of the fixed shell (10); When the sliding shell (20) moves further into the fixed shell (10), the printing head (341) on the switching device, which is close to the window (211), extends beyond the printing plate (21) and is flush with the stamping information on the printing plate (21).

3. The seal ejection structure according to claim 2, characterized in that, The fixed shell (10) has a relief groove (111) between the through hole and the inner end face of the fixed shell (10), the relief groove (111) allows the chuck (221) to pass through without being compressed.

4. The seal ejection structure according to claim 2, characterized in that, At least one locking strip (12) is provided on the inner wall of the fixed shell (10), and the switching device is provided with a positioning end (311) that can be adapted to the outer end of the locking strip (12); after the locking head (221) on the sliding shell (20) is engaged with the through hole on the fixed shell (10), when the sliding shell (20) moves into the fixed shell (10), the locking strip (12) restricts the switching device from moving with the sliding shell (20).

5. The seal ejection structure according to claim 2, characterized in that, The switching device includes a frame (31), a rotating shaft (32), a rotating block (33), a rotating belt (34), a first handwheel (35), and a second handwheel (36). At least two parallel rotating shafts (32) are rotatably connected in the frame (31). Several rotating blocks (33) are rotatably connected on the rotating shafts (32). A tensioned rotating belt (34) is fitted around the outer periphery of the two corresponding rotating blocks (33) on the two rotating shafts (32). Several printing heads (341) are provided on the rotating belt (34). The first handwheel (35) is provided on the outer end face of the rotating block (33) located on the outer side. The second handwheel (36) is provided on the side end face of the several rotating blocks (33) located on the inner side. The rotating shaft (32) passes through the center of the first handwheel (35) and the second handwheel (36).

6. The seal ejection structure according to claim 5, characterized in that, The diameter of the first handwheel (35) is smaller than the diameter of the second handwheel (36).

7. The seal ejection structure according to claim 5, characterized in that, The inner end face of the frame (31) abuts against the inner surface of the sliding shell (20). When the sliding shell (20) moves outward toward the fixed shell (10), it can drive the frame (31) to move. The side of the frame (31) facing the clip (12) on the fixed shell (10) is provided with a positioning end (311).

8. A seal, characterized in that, The stamp ejection structure includes the stamp ejection structure according to any one of claims 1 to 7, wherein a stamp cover assembly (40) is detachably connected to one end of the stamp plate (21) of the stamp ejection structure.

9. The seal according to claim 8, characterized in that, The stamp assembly (40) includes an ink pad cover (41), a movable plate (42), and a top cover (43). One side of the ink pad cover (41) is engaged with the stamp plate (21), and the other side is engaged with the top cover (43). The movable plate (42) is provided inside the ink pad cover (41) facing the stamp plate (21). The movable plate is provided with an ink pad (421). When the movable plate (42) is pushed by an external force from the top cover (43), it moves toward the stamp plate (21) and pushes the sliding shell (20) to move, so that the stamp head (341) at the window (211) contacts the ink pad (421). The ink pad cover (41) has a through punch (411) in the center. The movable plate (42) is connected to the punch (411) through the colloid head (422). The colloid head (422) is elastic and can recover after being stretched. One side of the colloid head (422) is clamped and fixed by the top cover (43) and the ink pad cover (41). The colloid head (422) has an oiling hole (4221) in the center.

10. The seal according to claim 9, characterized in that, The top cover (43) is provided with a second soft rubber film (431). The second soft rubber film (431) is provided with a top head (432) on the side facing the movable plate (42). The middle part of the rubber head (422) is cylindrical, with an oil hole (4221) in the center. It is set along the inner wall of the punch (411). The top head (432) is inserted into the oil hole (4221) and abuts against the movable plate (42).