Stamp having a cutting tool

Abstract

A stamp comprises a stamp assembly (1) with a cutting tool (2) mounted inside. A tool seat (30) of the cutting tool (2) has an inclined blade recess (3012), where a moving element (32) and a blade (31), connected together, are mounted in. An operating element (34) is mounted in the tool seat (30) and combined with a resilient unit (33), connectting to the moving element (32). When disposed at an idle or extending-out position (3022, 3023) of the tool seat (30), the operating element (34) is fixed by the resilient unit (33) while the blade (31) is fixed through the moving element (32). When forced, the operating element (34) detaches from the tool seat (30) to be moved, and the blade (31) is driven by the moving element (32) to extend out of or retreat back to the tool seat (30).

Description

1. Field of the Invention

[0001] The present invention relates to a stamp, especially to a stamp having functions of cutting to unpack and roll-printing garbled characters to protect personal identity information.2. Description of Related Art

[0002] Nowadays, online shopping, home shipping, etc. provide people with convenient ways to do shopping. Because online shopping and home shipping deliver goods through packages and packing boxes, recipient's personal information must be marked on the packages or the packing boxes for logistics and distribution, and for confirmation of the recipient's identity. After the recipient receives the package, as their personal information is shown on the package, the recipient usually needs to remove the information before throwing away the package for protecting their personal information.

[0003] To remove the personal information, the recipient uses dark-color markers to cover the information or peels off stickers with the information from the package. However, this is inconvenient. So, there are protection roller stamps on the market that can roll and print garbled characters. The recipient uses the protection roller stamps to stamp dark-color garbled-characters patterns on the stickers to cover personal information, so that the package will no longer reveal their personal information.

[0004] In addition, the protection roller stamp nowadays further has a foldable cutting tool to facilitate unpacking. However, the foldable cutting tool of the roller stamp is inconvenient in use, thus needing to be improved.

[0005] The main objective of the present invention is to provide a stamp having a cutting tool to resolve drawbacks that a foldable cutting tool of a conventional roller stamp is inconvenient in use.

[0006] The stamp comprises a stamp assembly and the cutting tool. The stamp assembly comprises a main body and a bottom cover detachably mounted at a bottom portion of the main body. The main body comprises an assembling opening disposed at a top portion of the main body. The cutting tool is mounted at the main body and comprises a tool seat, a blade, a moving element, a resilient unit, and an operating element. The tool seat is mounted at the assembling opening of the main body and comprises a moving chamber and an inclined blade recess. The inclined blade recess communicates with the moving chamber, is disposed at a side of the moving chamber, is inclinedly elongated to a top portion of the tool seat, and forms a blade entrance at the top portion of the tool seat. The tool seat comprises a horizontal elongated hole disposed at the top portion of the tool seat, communicating with the moving chamber, and defined to have an idle position and an extending-out position located horizontally apart from each other. The extending-out position is disposed at an end, adjacent to the blade entrance, of the horizontal elongated hole. The blade entrance and the horizontal elongated hole are exposed outside of the main body. The blade is mounted in the inclined blade recess of the tool seat and can be operated to be pushed inclinedly and upwardly out of the blade entrance along the inclined blade recess and to be pushed backwardly into the inclined blade recess. The moving element is mounted inside the tool seat, is connected to the blade, and can be moved inside the moving chamber of the tool seat to drive the blade moving along the inclined blade recess. The resilient unit is mounted inside the moving element. The operating element passes through the horizontal elongated hole of the top portion of the tool seat and is mounted through the moving element. The resilient unit applies a resilient force to the operating element, such that when the operating element is disposed at the idle position or the extending-out position of the tool seat, the operating element is buckled and limited in position in the tool seat by the resilient force from the resilient unit. A position of the blade is fixed by the moving element. The operating element is detachable from the tool seat when under an external force. When the operating element is under the external force to be detached from the tool seat, the operating element is movable along the horizontal elongated hole, and the blade is driven by the moving element to extend out from or retreat backwardly to the tool seat through the blade entrance of the tool seat.

[0007] In the stamp, the operating element is mounted through the horizontal elongated hole of the tool seat of the cutting tool mounted in the main body. The operating element combines the resilient unit to be connected to the moving element in the tool seat while the moving element movably connects the blade, thereby combining elements in the stamp. When the operating element is disposed at the idle position or the extending-out position of the tool seat, the resilient force of the resilient unit buckles and limits the operating element in position in the tool seat, and the moving element limits the blade in position, thereby ensuring safety of the cutting tool during use and idling. The operating element can be forced to be detached from the tool seat to be moved along the horizontal elongated hole. Simultaneously, the blade is driven by the moving element to extend out of or retreat backwardly to the tool seat through the blade entrance of the tool seat. Therefore, the cutting tool is very convenient in use.

[0008] Furthermore, in the stamp, the main body is mounted in a stamp-printing mechanism inside a shell. A top portion of a roller base of a stamp roller set is rotatably mounted in an installing seat, which is mounted inside the shell. Two elastic elements are respectively mounted at two sides of a rotatably-mounted portion between the top portion of the roller base and the installing seat. The roller base can be rotated relative to the installing seat while the two elastic elements respectively provide two elastic forces at two sides. The two elastic elements respectively apply the elastic forces at two ends along an axis of a stamp roller of the stamp roller set to keep balance of the stamp roller set in the roller base while rolling and stamping. So, the stamp roller set is securely and flatly rolled on a surface of an object to print patterns according to how a user applies force. The printed patterns fully cover the surface of the object, ensuring that the patterns printed by the stamp roller set will not be uneven due to unevenly-applied force.IN THE DRAWINGS

[0009] Fig. 1 is a perspective view of an embodiment of a stamp having a cutting tool in accordance with the present invention, with the cutting tool idling; Fig. 2 is an exploded view of the stamp shown in Fig. 1, with the cutting tool detached; Fig. 3 is a perspective view of the cutting tool of the stamp shown in Figs. 1 and 2; Fig. 4 is an exploded view of the cutting tool shown in Figs. 1 to 3; Fig. 5 is another exploded view of the cutting tool shown in Figs. 1 to 3; Fig. 6 is a partially sectional view of the stamp, with the cutting tool idling; Fig.7 is a top view of the cutting tool shown in Figs. 1 to 4; Fig. 8 is a side sectional view across line 8-8 in Fig. 7, showing the cutting tool shown in Figs. 1 to 4 at a position shown in Fig. 7; Fig. 9 is a side sectional view of the cutting tool shown in Fig. 8 with an operating element pressed down; Fig. 10 is a partial sectional view of the stamp, with the cutting tool extending out; Fig. 11 is an exploded perspective view of a stamp-printing mechanism in the stamp shown in Fig. 1; Fig. 12 is an exploded perspective view of a bottom cover and the stamp-printing mechanism shown in Fig. 11; Fig. 13 is another exploded perspective view of the bottom cover and the stamp-printing mechanism shown in Fig. 11; Fig. 14 is a partial sectional view of a main body of the stamp; Fig. 15 is a partial sectional view of the main body of another embodiment of the stamp; and Fig. 16 is an operational side view of the stamp, used to stamp and print.

[0010] As shown in Fig. 1, an embodiment of a stamp having a cutting tool 2 comprises a stamp assembly 1 and the cutting tool 2.

[0011] As shown in Figs. 1 and 2, the stamp assembly 1 comprises a main body 1A and a bottom cover 1B. The main body 1A is an object that can stamp to print. The main body 1A has an assembling opening 11 disposed at a top portion of the main body 1A. The bottom cover 1B is detachably mounted at a bottom portion of the main body 1A.

[0012] As shown in Figs. 2 to 8, the cutting tool 2 is mounted at the top portion of the main body 1A and comprises a tool seat 30, a blade 31, a moving element 32, a resilient unit 33, and an operating element 34.

[0013] As shown in Figs. 2 to 8, the tool seat 30 is mounted at the top portion of the main body 1A and extends into a containing chamber 100 through the assembling opening 11. The tool seat 30 has a moving chamber 3011 and an inclined blade recess 3012 communicating with the moving chamber 3011 and disposed at a side of the moving chamber 3011. The inclined blade recess 3012 is elongated and inclined to a top portion of the tool seat 30 and forms a blade entrance 3013 at a side of the top portion of the tool seat 30. The tool seat 30 has a horizontal elongated hole 3021 disposed at the top portion of the tool seat 30 and communicating with the moving chamber 3011 from top to down. The blade entrance 3013 and the horizontal elongated hole 3021 are exposed outside of the main body 1A.

[0014] As shown in Figs. 3 to 5, the horizontal elongated hole 3021 is defined to have an idle position 3022 and an extending-out position 3023 located horizontally apart from each other. The extending-out position 3023 is disposed at an end, adjacent to the blade entrance 3013, of the horizontal elongated hole 3021. In this embodiment, the tool seat 30 comprises a first buckling dent 3024 and a second buckling dent 3025. The first buckling dent 3024 is disposed at an inner wall of the horizontal elongated hole 3021 at the idle position 3022. The second buckling dent 3025 is disposed at the inner wall of the horizontal elongated hole 3021 at the extending-out position 3023.

[0015] As shown in Figs. 2 to 8, the tool seat 30 comprises a seat body 301 and a terminal board portion 302 disposed at a top portion of the seat body 301. The moving chamber 3011 is disposed in the seat body 301. The inclined blade recess 3012 is disposed at a side of the seat body 301 and is below the terminal board portion 302. The blade entrance 3013 is disposed at a side of the terminal board portion 302. The horizontal elongated hole 3021 is disposed in the terminal board portion 302.

[0016] As shown in Figs. 2 to 6, the blade 31 is mounted at the inclined blade recess 3012 of the tool seat 30 and can be operated to be pushed inclinedly and upwardly out of the blade entrance 3013 along the inclined blade recess 3012 and to be pushed backwardly and retreat into the inclined blade recess 3012. In this embodiment, the blade 31 has a blade tail portion 311 having a vertical hole 312 being linear in the blade tail portion 311.

[0017] As shown in Figs. 3 to 5, the moving element 32 is mounted inside the tool seat 30 and can be moved horizontally in the moving chamber 3011 of the tool seat 30. The moving element 32 comprises a linking portion 321 disposed at a side, facing the blade 31, of the moving element 32. The moving element 32 is movably connected to the blade tail portion 311 of the blade 31 through the linking portion 321. The moving element 32 comprises an assembling hole 322 and a guiding recess 323. The assembling hole 322 is elongated downwardly from a top portion of the moving element 32. The guiding recess 323 is disposed at a side wall of the assembling hole 322 and elongated downwardly from the top portion of the moving element 32.

[0018] As shown in Figs. 3 to 5, the resilient unit 33 is mounted inside the assembling hole 322 of the moving element 32. The resilient unit 33 can be optionally chosen from compression springs, plate springs, or other elastic components.

[0019] As shown in Figs. 3 and 4, in this embodiment, the linking portion 321 comprises a rod portion 3211 and a limiting block 3212. The rod portion 3211 is mounted through the vertical hole 312 of the blade tail portion 311. The limiting block 3212 is disposed at a side, opposite to the moving element 32, of the blade tail portion 311. A horizontal width of the limiting block 3212 is longer than a horizontal width of the vertical hole 312, so the limiting block 3212 is limited at said side of the blade tail portion 311. Therefore, through the linking portion 321 and the vertical hole 312 cooperating with each other, the blade 31 can be moved upwardly and downwardly relative to the moving element 32. When operated to move horizontally, the moving element 32 drives the blade 31 to move inclinedly along the inclined blade recess 3012, making the blade 31 extend out of the tool seat 30 or retreat back into the tool seat 30.

[0020] As shown in Figs. 3 to 5 and 8, the operating element 34 passes through the horizontal elongated hole 3021 at the top portion of the tool seat 30 and extends into the moving chamber 3011 to connect the moving element 32. The operating element 34 is forced by the resilient unit 33 to connect the tool seat 30 to be fixed in position. When the operating element 34 is operated under an external force to be detached from the tool seat 30, the operating element 34 can be moved to change places between the idle position 3022 and the extending-out position 3023 of the horizontal elongated hole 3021. Simultaneously, the blade 31 is driven by the moving element 32 to extend out of the tool seat 30 or retreat back into the tool seat 30. When the operating element 34 is not operated, the operating element 34 is forced by the resilient unit 33 to reconnect the tool seat 30 to be fixed in position.

[0021] As shown in Figs. 3 to 5 and 8, in this embodiment, the operating element 34 comprises an operating end portion 341 and an operating rod 342 extending downwardly from a bottom surface of the operating end portion 341. A buckling block 343 is formed at a lateral side of the operating rod 342. A moving space 344 is formed between the buckling block 343 and the bottom surface of the operating end portion 341. The operating rod 342 of the operating element 34 passes through the horizontal elongated hole 3021 of the tool seat 30 and is mounted through the assembling hole 322 of the moving element 32. The operating end portion 341 is disposed above the tool seat 30. The buckling block 343 of the operating element 34 is disposed inside the guiding recess 323. The resilient unit 33 connects between the operating rod 342 and the moving element 32 to provide a resilient force, so the operating element 34 can be moved upwardly and downwardly in the moving element 32.

[0022] As shown in Figs. 6 and 8 to 10, in the above description, when the operating element 34 is disposed at the idle position 3022 or at the extending-out position 3023, the operating element 34 is pushed up by the resilient force of the resilient unit 33. So, the buckling block 343 positions and buckles with the first buckling dent 3024 or the second buckling dent 3025 of the horizontal elongated hole 3021 of the tool seat 30 to fix the operating element 34. When the operating element 34 is pressed down, the buckling block 343 is detached from the first buckling dent 3024 or the second buckling dent 3025 and the inner wall of the horizontal elongated hole 3021 corresponds to the moving space 344 of the operating element 34 in position, so the operating element 34 can be moved in the horizontal elongated hole 3021 of the tool seat 30.

[0023] In the embodiment shown in Figs. 2 and 11, the main body 1A of the stamp assembly 1 comprises a shell 10 and a stamp-printing mechanism 20. The shell 10 has a containing chamber 100 having an opening facing downwardly. The assembling opening 11 is disposed at a top portion of the shell 10 and communicates with the containing chamber 100. The stamp-printing mechanism 20 is mounted at the containing chamber 100 of the shell 10 and extends out from a bottom side of the shell 10. The bottom cover 1B is detachably mounted at the bottom side of the shell 10 of the main body 1A and covers a part of the stamp-printing mechanism 20 that extends out of the shell 10.

[0024] In the embodiment shown in Fig. 11, the shell 10 has two clipping holes 12 respectively disposed at two horizontally opposite sides of the shell 10's wall.

[0025] As shown in Figs. 11 to 14, the stamp-printing mechanism 20 comprises an installing seat 21, a roller base 22, two elastic elements 23 and a stamp roller set 24. The installing seat 21 is detachably mounted in the containing chamber 100 of the shell 10 and comprises a first rotating portion 2111. In this embodiment, the installing seat 21 comprises a top board portion 211 and two installing lateral walls 212 extending from two ends of the top board portion 211 downwardly. The first rotating portion 2111 is disposed at middle of a bottom portion of the top board portion 211. The top board portion 211 comprises two abutting portions 2112 respectively disposed at two sides of the first rotating portion 2111. Each one of the two installing lateral walls 212 has a clipping block 2121. The installing seat 21 is mounted inside the shell 10 by the clipping block 2121 of each of the two installing lateral walls 212 clamping one of the two clipping holes 12 on the shell 10's wall at corresponding positions.

[0026] As shown in Figs. 12 to 14, the roller base 22 is rotatably mounted in the installing seat 21 and comprises a second rotating portion 2211. The second rotating portion 2211 is rotatably connected to the first rotating portion 2111 of the installing seat 21 so the roller base 22 can be rotated relative to the installing seat 21. In this embodiment, the roller base 22 comprises a top base portion 221 and two lateral base portions 222 extending from two ends of the top base portion 221. The second rotating portion 2211 is disposed at middle of a top surface of the top base portion 221. The top base portion 221 has two top connecting portions 2212 disposed at the top surface of the top base portion 221 and at two sides of the second rotating portion 2211. The two top connecting portions 2212 respectively correspond in position to the two abutting portions 2112 of the installing seat 21.

[0027] In the embodiment shown in Figs. 13 and 14, the first rotating portion 2111 of the installing seat 21 is a cylindrical rod and the second rotating portion 2211 of the roller base 22 is a C-shaped seat. Thus, the roller base 22 can be easily and quickly connected to the first rotating portion 2111 of the installing seat 21 through the second rotating portion 2211. In another embodiment shown in Fig. 15, the cylindrical rod and the C-shaped seat exchange places. Which means, the first rotating portion 2111 of the installing seat 21 is the C-shaped seat and the second rotating portion 2211 of the roller base 22 is the cylindrical rod. This still makes the roller base 22 easily and quickly connected to the first rotating portion 2111 of the installing seat 21 through the second rotating portion 2211.

[0028] As shown in Figs. 12 to 14, the two elastic elements 23 are mounted between the installing seat 21 and the roller base 22, are respectively disposed at the two sides of the first rotating portion 2111, and are respectively disposed at the two sides of the second rotating portion 2211 to respectively apply two elastic forces at two sides of the top portion of the roller base 22. The two elastic elements 23 can be compression springs, plate springs or other elastic components. In this embodiment, the two elastic elements 23 are compression springs, respectively correspond to one of the two abutting portions 2112, and respectively correspond to one of the two top connecting portions 2212. Each one of the two abutting portions 2112 has a first positioning block 2113 and each one of the two top connecting portions 2212 has a second positioning block 2213. Each one of the two elastic elements 23 is connected between the corresponding abutting portion 2112 and the corresponding top connecting portion 2212. Two ends of each one of the two elastic elements 23 are respectively mounted at the first positioning block 2113 of the corresponding abutting portion 2112 and the second positioning block 2213 of the corresponding top connecting portion 2212. The top base portion 221 of the roller base 22 has four barriers 2214. Two of the four barriers 2214 are respectively disposed at two opposite sides of one of the two elastic elements 23 for protecting said elastic element 23.

[0029] As shown in Figs. 12 to 14, the stamp roller set 24 is rotatably mounted in the roller base 22. The two elastic elements 23 respectively apply the two elastic forces at two ends along an axis of the stamp roller set 24, which extends out of a bottom portion of the shell 10. The stamp roller set 24 comprises a roller shaft assembly 241 and a stamp roller 242. The roller shaft assembly 241 is composed by two roller shaft components 2411 aligned and connected to each other. The stamp roller 242 absorbs ink and has a printing surface on its surface. The stamp roller set 24 is mounted at the roller shaft assembly 241. Two ends of the roller shaft assembly 241 are respectively and rotatably mounted at the two lateral base portions 222 of the roller base 22, so the stamp roller 242 is rotatable.

[0030] As shown in Figs. 11 to 14, the bottom cover 1B is detachably mounted at the shell 10 of the main body 1A to cover the stamp roller set 24 inside.

[0031] Figs. 6 and 8 to 10 elaborate usage of the stamp having the cutting tool 2 in accordance with the present invention. While using the cutting tool 2 of the stamp to unbox, the operating element 34 of the cutting tool 2 on the top portion of the stamp assembly 1 is pressed down. The operating element 34 at the idle position 3022 compresses the resilient unit 33 to be lowered. At this time, the buckling block 343 of the operating element 34 is detached from the first buckling dent 3024 of the tool seat 30 and the inner wall of the horizontal elongated hole 3021 of the tool seat 30 corresponds in position to the moving space 344 of the operating element 34. So, the operating element 34 can be moved in the horizontal elongated hole 3021 from the idle position 3022 of the tool seat 30 toward the extending-out position 3023. Simultaneously, the moving element 32 is moved along with the operating element 34 to drive the blade 31 to extend out of the tool seat 30 along the inclined blade recess 3012. When the operating element 34 is moved to the extending-out position 3023 and is released, the resilient force of the resilient unit 33 pushes the operating element 34 upwardly. Hence, the buckling block 343 of the operating element 34 buckles the second buckling dent 3025 at the extending-out position 3023 of the tool seat 30, making the blade 31 unable to retreat back into the tool seat 30. So, a user can hold the stamp by hand and use the blade 31 to cut open boxes or packages. After using, the blade 31 can be retreated back into the tool seat 30 by operating the cutting tool 2 oppositely, ensuring safety.

[0032] As shown in Figs. 14 to 16, when the stamp assembly 1 of the stamp is used to stamp, the bottom cover 1B is removed so that the stamp roller 242 is exposed outside of the bottom portion of the shell 10 of the main body 1A. The user holds the shell 10 of the main body 1A to stamp garbled-characters patterns on the stickers of boxes or packages by the stamp roller 242 to cover personal information on the stickers. When stamping, the stamp roller 242 contacts a surface of a to-be-printed object. The two elastic elements 23 of the stamp assembly 1 apply the two elastic forces on the top portion of the roller base 22 of the stamp roller 242. The two elastic elements 23 are disposed between the installing seat 21 and the roller base 22, and are respectively disposed at the two sides of the first rotating portion 2111 and the second rotating portion 2211, which are rotatably connected to each other. Therefore, the two elastic elements 23 apply the two elastic forces respectively at two ends along an axis of the stamp roller 242 to keep balance of the stamp roller set 24 in the roller base 22 while rolling and stamping. So, the stamp roller set 24 is securely and flatly rolled on the surface of the object to print patterns according to how the user applies force, and the printed patterns fully cover the surface of the object. After stamping, the bottom cover 1B is assembled back to the bottom portion of the shell 10 of the main body 1A to cover the stamp roller 242 so that the stamp roller 242 will not stain other things.

[0033] Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.

Claims

1. A stamp, characterized in that the stamp comprises a stamp assembly comprising a main body comprising an assembling opening disposed at a top portion of the main body; a bottom cover detachably mounted at a bottom portion of the main body; a cutting tool mounted inside the main body and comprising a tool seat mounted at the assembling opening of the main body and comprising a moving chamber; an inclined blade recess communicating with the moving chamber, disposed at a side of the moving chamber, inclinedly elongated to a top portion of the tool seat, and having a blade entrance formed at the top portion of the tool seat; a horizontal elongated hole disposed at the top portion of the tool seat, communicating with the moving chamber, and defined to have an idle position and an extending-out position located horizontally apart from each other; the extending-out position disposed at an end, adjacent to the blade entrance, of the horizontal elongated hole; the blade entrance and the horizontal elongated hole exposed outside of the main body; a blade mounted in the inclined blade recess of the tool seat and configured to be operated to be pushed inclinedly and upwardly out of the blade entrance along the inclined blade recess and to be pushed backwardly into the inclined blade recess; a moving element mounted inside the tool seat, connected to the blade, and movable inside the moving chamber of the tool seat to drive the blade to move along the inclined blade recess; a resilient unit mounted inside the moving element; and an operating element passing through the horizontal elongated hole of the top portion of the tool seat and mounted through the moving element; wherein the resilient unit applies a resilient force to the operating element, such that when the operating element is disposed at the idle position or the extending-out position of the tool seat, the operating element is buckled and limited in position in the tool seat by the resilient force from the resilient unit, and a position of the blade is fixed by the moving element; the operating element is detachable from the tool seat when under an external force; when the operating element is under the external force to be detached from the tool seat, the operating element is movable along the horizontal elongated hole, and the blade is driven by the moving element to extend out of or retreat backwardly to the tool seat through the blade entrance of the tool seat.

2. The stamp as claimed in claim 1, wherein the tool seat comprises a first buckling dent disposed at an inner wall of the horizontal elongated hole at the idle position; a second buckling dent disposed at the inner wall of the horizontal elongated hole at the extending-out position; the moving element comprises a linking portion movably connected to the blade; an assembling hole elongated downwardly from a top portion of the moving element; a guiding recess disposed at a side wall of the assembling hole and elongated downwardly from the top portion of the moving element; the operating element comprises an operating end portion disposed above the tool seat; an operating rod extending downwardly from a bottom surface of the operating end portion; a buckling block formed at a lateral side of the operating rod and disposed inside the guiding recess; a moving space formed between the buckling block and the bottom surface of the operating end portion; the operating rod of the operating element passes through the horizontal elongated hole of the tool seat and is mounted through the assembling hole of the moving element; the resilient unit is mounted in the assembling hole and connected between the operating rod and the moving element to provide the resilient force; the operating element is configured to be moved upwardly and downwardly in the moving element, such that the buckling block is buckled with the first buckling dent or the second buckling dent.

3. The stamp as claimed in claim 1, wherein the blade comprises a blade tail portion having a vertical hole being linear; the moving element comprises a linking portion disposed at a side, facing the blade, of the moving element and comprising a rod portion mounted through the vertical hole of the blade tail portion; a limiting block disposed at an end of the rod portion, disposed and limited in position at a side, opposite to the moving element, of the blade tail portion; when the blade is driven to move along the inclined blade recess, the blade is moved up and down relative to the moving element.

4. The stamp as claimed in claim 2, wherein the blade comprises a blade tail portion having a vertical hole being linear; the linking portion of the moving element is disposed at a side, facing the blade, of the moving element and comprises a rod portion mounted through the vertical hole of the blade tail portion; a limiting block disposed at an end of the rod portion, disposed and limited in position at a side, opposite to the moving element, of the blade tail portion; when the blade is driven to move along the inclined blade recess, the blade is moved up and down relative to the moving element.

5. The stamp as claimed in any one of claims 1 to 4, wherein the main body of the stamp assembly comprises a shell having a containing chamber having an opening facing downwardly; a stamp-printing mechanism mounted inside the containing chamber of the shell and extending outwardly from a bottom portion of the shell; the assembling opening is disposed at a top portion of the shell and communicates with the containing chamber; the bottom cover is detachably mounted at the bottom portion of the shell of the main body and covers a part, which extends out of the shell, of the stamp-printing mechanism; the stamp-printing mechanism comprises an installing seat detachably mounted inside the shell and comprising a first rotating portion; two abutting portions respectively disposed at two sides of the first rotating portion; a roller base rotatably mounted at the installing seat and comprising a second rotating portion disposed at a top portion of the roller base and rotatably connected to the first rotating portion of the installing seat; two top connecting portions respectively disposed at two sides of the second rotating portion and respectively corresponding in position to the two abutting portions; a stamp roller set rotatably mounted inside the roller base and extending outwardly from the bottom portion of the shell; two elastic elements mounted between the installing seat and the roller base, respectively disposed at the two sides of the first rotating portion, respectively disposed at the two sides of the second rotating portion, and respectively applying two elastic forces at two positions, which are respectively at two sides of the top portion of the roller base and are respectively at two ends along an axis of the stamp roller set; the two elastic elements respectively corresponding to the two abutting portions, and respectively corresponding to the two top connecting portions; each one of the two elastic elements connected between the corresponding abutting portion and the corresponding top connecting portion.

6. The stamp as claimed in claim 5, wherein the installing seat comprises a top board portion; two installing lateral walls extending from two ends of the top board portion downwardly and detachably connected to the shell; the first rotating portion and the two abutting portions are disposed at a bottom portion of the top board portion; the roller base comprises a top base portion; two lateral base portions extending from two ends of the top base portion downwardly; the second rotating portion and the two top connecting portions are disposed at a top surface of the top base portion; the stamp roller set comprises a roller shaft assembly comprising two roller shaft components aligned and connected to each other; a stamp roller mounted at the roller shaft assembly, absorbing ink, having a printing surface, and rotatably mounted at the two lateral base portions of the roller base through two ends of the roller shaft assembly, such that the stamp roller set is rotatable.

7. The stamp as claimed in claim 6, wherein the two elastic elements are springs; each one of the two abutting portions of the installing seat has a first positioning block; each one of the two top connecting portions of the roller base has a second positioning block; two ends of each one of the springs are respectively mounted at the first positioning block of the corresponding abutting portion and the second positioning block of the corresponding top connecting portion to be limited in position; the top base portion of the roller base has four barriers; two of the four barriers respectively disposed at two opposite sides of one of the two elastic elements.

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