Seal protection and stamping device

Abstract

The application discloses a seal protection and stamping device and belongs to the field of seal management and control equipment, which comprises the following: a motor is installed on the rear end face of a fixed plate, one end of a first rotating connecting rod is fixedly connected with an output shaft, the other end is rotationally connected with one end of a second rotating connecting rod, the other end of the second rotating connecting rod is hingedly connected with a pressing plate, the pressing plate can move up and down on the front end face of the fixed plate through the rotation of the second rotating connecting rod, a third connecting rod is provided with a sliding groove at the lower end, the upper end of the third connecting rod is hingedly connected with the front end outside of the pressing plate, the outside of a stamping device is provided with a fixed sliding block connected with the sliding groove, two turnover devices are hingedly connected with the two sides of the fixed plate, and the left and right sides of the pressing plate are respectively provided with protruding structures connected with the turnover devices; the whole device integrates the protection of a seal, dipping oil and stamping and other steps, and the above-mentioned multiple actions can be completed through the driving of a motor in one circle, the structure is ingenious, the design is reasonable, the number of parts is small, the failure rate is low, and the device is quick and convenient to use.

Description

Technical Field

[0001] This invention relates to the field of seal control equipment, specifically to a seal protection and stamping device. Background Technology

[0002] Currently, the use of physical seals is still very common in China, and a variety of seal-related devices have emerged on the market, including stamping devices, seal management devices, and seal storage devices. A common challenge these designs face is seal protection. However, existing seal protection structures are complex, require multiple power sources, have numerous parts, and involve two separate actions for applying ink and stamping. This results in a bulky overall structure, a high failure rate, and a poor user experience.

[0003] In response to the above situation, there is an urgent need for a seal protection and stamping device that can perform a series of actions such as seal protection, ink application, and stamping in a single continuous motion. It should have a simple structure, low failure rate, and be quick and convenient to use. Summary of the Invention

[0004] To achieve the above objectives, the present invention aims to provide a new technical solution: with a compact structure, wide applicability, and high stability.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] Fixed plate, motor, first rotating link, second rotating link, third link, pressure plate, stamping device and flipping device;

[0007] The motor is mounted on the rear end face of the fixed plate, and the output shaft of the motor passes through the fixed plate. One end of the first rotating connecting rod is fixedly connected to the output shaft, and the other end is rotatably connected to one end of the second rotating connecting rod. The other end of the second rotating connecting rod is hinged to the pressure plate. The pressure plate can move up and down on the front end face of the fixed plate through the rotation of the second rotating connecting rod. The imprinting device is slidably mounted on the lower side of the front end of the fixed plate, and the upper end of the imprinting device is provided with a guide shaft. The pressure plate is provided with a guide hole that is slidably nested with the guide shaft. The lower end of the third connecting rod is provided with a sliding groove, and the upper end of the third connecting rod is hinged to the outer side of the front end of the pressure plate. The outer side of the imprinting device is provided with a fixed slider that slides in the sliding groove. There are two flipping devices, which are respectively hinged to both sides of the fixed plate. Each side of the pressure plate is provided with a protrusion structure that is slidably connected to the flipping device. The lower end of the imprinting device abuts against the flipping device. When the pressure plate moves downward, the protrusion structure slides and pushes the flipping device to separate from the imprinting device and flip backward.

[0008] The beneficial effects of the present application are: the motor drives the first rotating connecting rod to rotate along the motor output shaft, the first rotating connecting rod drives the second rotating connecting rod to move, the movement of the second rotating connecting rod further pushes and pulls the pressing plate to perform periodic up and down movement, when the pressing plate moves downward along the guide shaft to the end through the guide hole, it abuts against the stamping device to move downward synchronously, in this process, the turnover device is separated from the lower end of the stamping device under the pushing of the protruding structure on the left and right sides of the pressing plate, and is flipped backward, at this time, the stamping device is pushed to move downward and completes the stamping action as the pressing plate continues to move downward; after the stamping is completed, the pressing plate is driven to move upward, the sliding groove of the third connecting rod has pulled away from the stamping device, ensuring that the entire device returns to its original state; the entire device integrates the protection of the seal, oil dipping and stamping and other steps, and the above-mentioned multiple actions can be completed through one rotation of the motor, the structure is ingenious, the design is reasonable, the parts are few, the failure rate is low, and the use is fast and convenient.

[0009] Based on the above technical solutions, the present application can also be improved as follows:

[0010] Further, the turnover device comprises a connecting plate, an ink box and a fourth connecting rod, the connecting plate is hinged on the side edge of the fixed plate, the upper end of the connecting plate is provided with a turnover groove section and a smooth groove section which are in communication with each other, the protruding structure is slidably connected in the turnover groove section and the smooth groove section, the ink box is in a horizontal state and located at the lower end of the fixed plate, the lower end of the connecting plate is hinged with the middle section of the side surface of the ink box, one end of the fourth connecting rod is hinged at the lower end of the fixed plate, and the other end is hinged at the rear end of the side surface of the ink box, and the ink box is flipped vertically along the hinged position of the fourth connecting rod under the pushing of the connecting plate.

[0011] The beneficial effects of the above further scheme are: the ink box is located at the lowermost position and abuts against the lower end of the stamping device, and ensures that the lower end of the stamping device is dipped in the ink in the ink box, when the protruding structure slides in the turnover groove section, the connecting plate is pushed to rotate backward along the hinged point on the fixed plate, in this process, the fourth connecting rod is also pushed by the connecting plate and rotates along the hinged point at the lower end of the fixed plate, and the rotation of the fourth connecting rod also drives the ink box to flip along the hinged point of the fourth connecting rod, thereby realizing the flipping of the entire ink box; when the protruding structure slides in the smooth groove section, the ink box has been flipped, at this time, the sliding of the protruding structure no longer pushes the movement of the connecting plate, and the smooth groove section of the connecting plate is maintained in a vertical state, in this process, the stamping device is driven to slide downward by the pressing plate to complete the stamping; after the stamping is completed, the protruding structure moves upward, and the entire structure realizes the flipping and maintaining of the vertical state of the ink box through the sliding of the protruding structure in the turnover groove section and the smooth groove section respectively, thereby ensuring that the ink box does not block the stamping when the stamping is performed, and in the normal state, the ink box always abuts against the stamping device, the structure is simple, and the controllability is strong.

[0012] Further, the turning groove section and the smooth groove section are connected in an inclined manner, the pressing plate is lowered along the guide shaft and abuts against the upper end surface of the stamping device, the protruding structure slides to the end in the turning groove section, the connecting plate rotates along the hinge joint between the connecting plate and the fixed plate, and the ink box is turned from a horizontal state to a vertical state by the turning device.

[0013] After the pressing plate abuts against the stamping device, the pressing plate moves downward synchronously, and the smooth groove section is in a vertical state; the protruding structure slides in the smooth groove section in the vertical state.

[0014] The beneficial effect of the above further scheme is that the turning groove section and the smooth groove section are connected in an inclined manner, so that the protruding structure can slide in the two groove sections; when the pressing plate is lowered to the bottom along the guide shaft and abuts against the stamping device, the protruding structure moves in the turning groove section and pushes the entire connecting plate to rotate along the hinge joint between the connecting plate and the fixed plate; when the pressing plate abuts against the stamping device and drives the stamping device to move downward synchronously, the protruding structure moves in the smooth groove section, the protruding structure moves downward, and the smooth groove section is in a vertical state, so that the connecting plate continuously maintains the turned state without being affected by the tangential force, and the stamping device can move downward to complete the stamping process. The design of the turning groove section and the smooth groove section realizes two different actions and ensures the turning and maintaining of the ink box.

[0015] Further, the ink box is provided with ink required by the stamp.

[0016] The beneficial effect of the above further scheme is that the lower end of the stamping device abuts against the ink box, so that the stamp is dipped in the ink.

[0017] Further, the middle section of the ink box is wider than the rear section, and the connecting plate and the fourth connecting rod are connected in a staggered manner on the ink box.

[0018] The beneficial effect of the above further scheme is that the middle section of the ink box is wider than the rear section, so that the rotation of the connecting plate and the fourth connecting rod is in the same direction, and the rotation of the two does not collide.

[0019] Further, the stamping device comprises a pressure plate, a supporting rod, a stamp fixing plate, and a stamp, the guide shaft is installed on the upper end surface of the pressure plate, the pressure plate is connected to the stamp fixing plate through the supporting rod, the stamp is detachably connected to the stamp fixing plate, and the turning device abuts against the lower end surface of the stamp.

[0020] The beneficial effect of the further scheme is that the pressing plate slides along the guide shaft and finally abuts against the pressed plate, the pressing plate is continuously driven by the second rotating connecting rod, and the pressed plate is mechanically pushed to move downward, since the seal is detachably clamped in the seal fixing plate, and the supporting rod connects the pressed plate and the seal fixing plate, and the inner space is used for placing the seal, the downward movement of the pressed plate also drives the downward movement of the seal, thereby completing the stamping process of the seal.

[0021] Further, the motor is a self-locking motor.

[0022] The beneficial effect of the further scheme is that the self-locking motor can control the stamping device to be always in the state of stamping, which is convenient to use.

[0023] Further, the seal protection and stamping device further comprises a shell, which is sleeved outside the fixing plate.

[0024] The beneficial effect of the further scheme is that the shell is used for protecting the internal structure, and is convenient to hold by hand to facilitate stamping. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a front structure schematic diagram of the present application;

[0026] Figure 2 It is a back structure schematic diagram of the present application;

[0027] Figure 3 It is a structure schematic diagram of the pressing plate pressing and turning device starting to turn of the present application;

[0028] Figure 4 It is a structure schematic diagram of the pressing plate pressing and turning device completing turning of the present application;

[0029] Figure 5 It is a structure schematic diagram of the pressing plate pressing and stamping device stamping of the present application;

[0030] Figure 6 It is a structure schematic diagram of the connecting plate of the present application.

[0031] In the drawings, the components represented by each reference numeral are listed as follows:

[0032] 1, fixing plate; 2, motor; 21, output shaft; 3, first rotating connecting rod; 4, second rotating connecting rod; 5, third connecting rod; 51, sliding groove; 6, pressing plate; 7, stamping device; 71, guide shaft; 72, pressed plate; 73, supporting rod; 74, seal fixing plate; 75, seal; 8, turning device; 81, connecting plate; 811, turning groove section; 812, smooth groove section; 82, ink box; 83, fourth connecting rod; 9, protruding structure. DETAILED DESCRIPTION

[0033] To make the purpose, technical solution, and advantages of the invention clearer, the invention will be further described in detail below with reference to the accompanying drawings, but this is not intended to limit the scope of the invention.

[0034] Example 1: As Figures 1-2 As shown, an embodiment of a seal protection and stamping device disclosed in this invention includes:

[0035] Fixed plate 1, motor 2, first rotating connecting rod 3, second rotating connecting rod 4, third connecting rod 5, pressure plate 6, stamping device 7, and flipping device 8;

[0036] Motor 2 is mounted on the rear end face of fixed plate 1, and the output shaft 21 of motor 2 passes through fixed plate 1. One end of the first rotating connecting rod 3 is fixedly connected to the output shaft 21, and the other end is rotatably connected to one end of the second rotating connecting rod 4. The other end of the second rotating connecting rod 4 is hinged to the pressure plate 6. The pressure plate 6 can move up and down on the front end face of fixed plate 1 by the rotation of the second rotating connecting rod 4. Imprinting device 7 is slidably mounted on the lower side of the front end of fixed plate 1, and the upper end of imprinting device 7 is provided with a guide shaft 71. The pressure plate 6 is provided with a slidingly nested part that is nested with the guide shaft 71. The guide hole and the lower end of the third connecting rod 5 are provided with a sliding groove 51. The upper end of the third connecting rod 5 is hinged to the outer side of the front end of the pressure plate 6. The outer side of the imprinting device 7 is provided with a fixed slider that slides in the sliding groove 51. There are two flipping devices 8, which are respectively hinged to both sides of the fixed plate 1. The left and right sides of the pressure plate 6 are each provided with a protruding structure 9 that is slidably connected to the flipping device 8. The lower end of the imprinting device 7 abuts against the flipping device 8. When the pressure plate 6 moves downward, the protruding structure 9 slides and pushes the flipping device 8 to separate from the imprinting device 7 and flip backward.

[0037] Specifically, the movement process of this device is as follows: the motor 2 drives the first rotating link 3 at the front end to rotate through the fixed plate 1 via the output shaft 21, and the other end of the first rotating link 3 is rotatably connected to the second rotating link 4. Since the end of the second rotating link 4 is hinged to the pressure plate 6, the second rotating link 4 will drive the pressure plate 6 to perform up and down periodic movements when it follows the rotation of the first rotating link 3.

[0038] During the up-and-down cyclical movement of the pressure plate 6, the downward movement is divided into two stages. The first stage is when the pressure plate 6 moves downward along the guide shaft 71 and approaches and abuts against the upper surface of the stamping device 7. During this process, the fixed slider in the third connecting rod 5 is also pushed to the uppermost end of the sliding groove 51. At the same time, the protruding structures 9 on the left and right sides of the pressure plate 6 push the flipping device 8 to rotate along the hinge point on the fixed plate 1, so that the flipping device 8 separates from the stamping device 7 and flips backward. At this time, there is no longer any obstruction or protection at the lower end of the stamping device 7. The second stage is when the pressure plate 6 abuts against the stamping device 7 and continues to move downward. At this time, since there is no obstruction at the lower end of the stamping device 7, the stamping device 7 is pushed downward by the pressure plate 6, thereby completing the stamping action. The entire downward movement is completed.

[0039] After the pressure plate 6 is driven to the lowest point by the second rotating connecting rod 4, it begins to move upward. This is also divided into two stages. In the first stage, the pressure plate 6 moves upward and drives the third connecting rod 5 to move upward. The fixed slider on the imprinting device 7 moves from the uppermost end to the lowermost end of the sliding groove 51, and pulls the imprinting device 7 upward and even resets it. In the second stage, when the pressure plate 6 is driven to reset, the protruding structure 9 begins to pull the flipping device 8 to rotate and reset. In this way, the entire device returns to its initial state.

[0040] It should be understood that the entire device integrates multiple steps such as seal protection, oiling, and stamping. All of the above actions can be completed by rotating the motor 2 once. It has a clever structure, reasonable design, few parts, low failure rate, and is quick and convenient to use.

[0041] Preferably, the first rotating link 3 can also be configured as an eccentric wheel structure.

[0042] Based on Example 1, Example 2: as follows Figures 3-6 As shown, the flipping device 8 includes a connecting plate 81, an ink cartridge 82, and a fourth connecting rod 83. The connecting plate 81 is hinged to the side of the fixed plate 1. The upper end of the connecting plate 81 has a flipping groove section 811 and a smoothing groove section 812 that are interconnected. The protruding structure 9 is slidably connected in the flipping groove section 811 and the smoothing groove section 812. The ink cartridge 82 is in a horizontal state and is located at the lower end of the fixed plate 1. The lower end of the connecting plate 81 is hinged to the middle section of the side of the ink cartridge 82. One end of the fourth connecting rod 83 is hinged to the lower end of the fixed plate 1, and the other end is hinged to the rear end of the side of the ink cartridge 82. Under the push of the connecting plate 81, the ink cartridge 82 flips backward to a vertical state along the hinge point with the fourth connecting rod 83.

[0043] Specifically, the flipping motion of the flipping device 8 is completed during the process of the pressure plate 6 moving downward through the guide shaft 71 to approach and abut against the upper end face of the printing device 7. As the pressure plate 6 moves downward, the protruding structure 9 on it first slides in the flipping groove section 811 and gives the inner wall a downward thrust. Then the entire connecting plate 81 rotates along the hinge point on the fixed plate 1. The rotation of the connecting plate 81 also drives the ink box 82 to move backward. Since one end of the fourth connecting rod 83 is hinged to the lower end of the fixed plate 1 and the other end is hinged to the rear end of the side of the ink box 82, the backward movement of the ink box 82 also pushes the fourth connecting rod 83 to rotate along the lower end of the fixed plate 1. The rotation amplitude of the fourth connecting rod 83 is much greater than the backward movement of the ink box 82. Thus, the horizontal ink box 82 is pulled by the fourth connecting rod 83 during the backward movement, completing the flipping motion along the hinge point on the fourth connecting rod 83.

[0044] When the pressing plate 6 abuts against the stamping device 7 and drives the stamping device 7 to move downward, the convex structure 9 slides in the smooth groove section 812, at this stage, the convex structure 9 keeps pushing the connecting plate 81 so that the ink box 82 is in the vertical state, and the stamping device 7 is driven to move downward to complete the stamping process.

[0045] It should be understood that the whole turnover device 8 realizes the turnover and keeping of the ink box 82 in the vertical state through the sliding of the convex structure 9 in the turnover groove section 811 and the smooth groove section 812 respectively, thereby ensuring that the ink box 82 does not block the stamping when the stamp is stamped, and the ink box 82 is always in abutment with the stamping device in the normal state, and the structure is simple and the operability is strong.

[0046] On the basis of embodiment 2, embodiment 3: as shown in Figures 3-5 The turnover groove section 811 and the smooth groove section 812 are connected in an inclined manner, the pressing plate 6 moves downward along the guide shaft 71 and abuts against the upper end surface of the stamping device 7, the convex structure 9 slides to the end in the turnover groove section 811, the connecting plate 81 rotates along the hinge joint of the connecting plate 81 and the fixed plate 1, and the ink box 82 is turned over from the horizontal device to the vertical state.

[0047] After the pressing plate 6 abuts against the stamping device 7, the pressing plate 6 moves downward synchronously, and the smooth groove section 812 is in the vertical state; the convex structure 9 slides in the smooth groove section 812 in the vertical state.

[0048] Specifically, the turnover groove section 811 and the smooth groove section 812 are connected, and the convex structure 9 can slide in the two groove sections, when the convex structure 9 moves in the turnover groove section 811, it helps the connecting plate 81 to rotate and realize the turnover of the ink box 82 from the horizontal device to the vertical state, and when the pressing plate 6 abuts against the stamping device 7 and continues to move, the smooth groove section 812 is in the vertical state because the connecting plate 81 rotates by a certain angle. At this time, the movement of the convex structure 9 is also vertical, thereby keeping the vertical state of the ink box 82 unchanged, and also completing the stamping process of the stamping device 7.

[0049] It should be understood that the turnover groove section 811 and the smooth groove section 812 are connected in an inclined manner, which ensures that the ink box 82 keeps in the vertical state after being turned over, and through one downward movement of the pressing plate 6, two different actions are realized, which ensures the turnover and keeping of the ink box, and realizes the stamping of the stamping device 7.

[0050] On the basis of embodiment 2, embodiment 4: as shown in Figure 2 The ink box 82 is provided with ink required by the stamp.

[0051] It should be understood that the ink is used to dip the oil before the stamp is stamped, which ensures the clarity and brightness of the stamp.

[0052] On the basis of embodiment 2, embodiment 5: as shown in Figure 2 The middle section of the ink box 82 is wider than the rear section, and the connecting plate 81 and the fourth connecting rod 83 are connected in a staggered manner on the ink box 82.

[0053] It should be understood that the rotation of the connecting plate 81 and the fourth connecting rod 83 is in the same direction, so the middle section of the ink box 82 is wider than the rear section, so that the ink box 82 does not collide when it is turned over.

[0054] On the basis of embodiment 1, embodiment 6: as shown in Figure 2 The stamping device 7 includes a pressure plate 72, a support rod 73, a stamp fixing plate 74, and a stamp 75. The guide shaft 71 is installed on the upper end surface of the pressure plate 72, the pressure plate 72 is connected to the stamp fixing plate 74 through the support rod 73, the stamp 75 is detachably connected in the stamp fixing plate 74, and the turning device 8 is in abutment with the lower end surface of the stamp 75.

[0055] Specifically, the pressure plate 6 slides along the guide shaft 71 and finally abuts against the pressure plate 72, the support rod 73 connects and supports the space between the pressure plate 72 and the stamp fixing plate 74, and the space is used for installing the stamp 75. The stamp fixing plate 74 fixes the stamp 75, and when the pressure plate 6 moves downward, it abuts against the pressure plate 72 and drives the stamp 75 to move downward, thereby completing the stamping process of the stamp 75.

[0056] On the basis of embodiment 1, embodiment 7: as shown in Figures 1-2 The motor 2 is a self-locking motor.

[0057] It should be understood that the self-locking motor can control the stamping device 7 to be always in the state of stamping, which is convenient for continuous stamping for many times.

[0058] On the basis of embodiment 1, embodiment 8: as shown in Figure 1 A stamp includes a shell, which is sleeved outside the fixing plate 1.

[0059] It should be understood that the shell plays a protective role for the internal components, and facilitates the user to stamp.

[0060] The above only describes the preferred embodiments of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A seal protection and stamping device, characterized in that The utility model relates to a printing device, including: Fixed plate (1), motor (2), first rotary connecting rod (3), second rotary connecting rod (4), third connecting rod (5), pressing plate (6), stamping device (7) and turnover device (8); The motor (2) is installed on the rear end surface of the fixed plate (1), and the output shaft (21) of the motor (2) passes through the fixed plate (1), one end of the first rotary connecting rod (3) is fixedly connected with the output shaft (21), the other end is rotatably connected with one end of the second rotary connecting rod (4), the other end of the second rotary connecting rod (4) is hinged on the pressing plate (6), the pressing plate (6) can move up and down on the front end surface of the fixed plate (1) through the rotation of the second rotary connecting rod (4), the stamping device (7) is slidably installed on the front end lower side of the fixed plate (1), and the upper end of the stamping device (7) is provided with a guide shaft (71), the pressing plate (6) is provided with a guide hole slidably nested with the guide shaft (71), the third connecting rod (5) is provided with a sliding groove (51) at the lower end, the upper end of the third connecting rod (5) is hinged with the front end outer side of the pressing plate (6), the outer side of the stamping device (7) is provided with a fixed sliding block sliding in the sliding groove (51), the turnover device (8) is hinged on both sides of the fixed plate (1), and the left and right side edges of the pressing plate (6) are respectively provided with convex structures (9) slidably connected with the turnover device (8), the lower end of the stamping device (7) abuts against the turnover device (8), when the pressing plate (6) moves downward, the convex structure (9) slides and pushes the turnover device (8) to separate from the stamping device (7) and turn over backward; The stamping device (7) comprises a seal (75); The motor (2) is a self-locking motor; Further comprising a shell, the shell is sleeved on the outer side of the fixed plate (1).

2. The stamp protection and application device of claim 1, wherein, The turnover device (8) comprises a connecting plate (81), an ink box (82) and a fourth connecting rod (83), the connecting plate (81) is hinged on the side edge of the fixed plate (1), the upper end of the connecting plate (81) is provided with a turnover groove section (811) and a smooth groove section (812) in communication with each other, the convex structure (9) is slidably connected in the turnover groove section (811) and the smooth groove section (812), the ink box (82) is in a horizontal state and located at the lower end of the fixed plate (1), the lower end of the connecting plate (81) is hinged with the middle section of the side face of the ink box (82), one end of the fourth connecting rod (83) is hinged at the lower end of the fixed plate (1), and the other end is hinged at the rear end of the side face of the ink box (82), the ink box (82) is pushed by the connecting plate (81) and turns over backward to a vertical state along the hinged place of the fourth connecting rod (83).

3. The stamp protection and application device of claim 2, wherein, The turnover groove section (811) and the smooth groove section (812) are connected in an inclined manner, the pressing plate (6) moves downward along the guide shaft (71) and abuts against the upper end surface of the stamping device (7), the convex structure (9) slides to the end in the turnover groove section (811), the connecting plate (81) rotates along the hinge joint between the connecting plate (81) and the fixed plate (1), and the ink box (82) is turned from a horizontal state to a vertical state by the turnover device (8). After the pressing plate (6) abuts against the stamping device (7), the pressing plate (6) moves downward synchronously, and the smooth groove section (812) is in a vertical state; the convex structure (9) slides in the smooth groove section (812) in the vertical state.

4. The stamp protection and application device of claim 2, wherein, The ink box (82) is provided with ink required by the stamp.

5. The stamp protection and application device of claim 2, wherein, The middle section of the ink box (82) is wider than the rear section, and the connecting plate (81) and the fourth connecting rod (83) are connected in a staggered rotating manner on the ink box (82).

6. The stamp protection and application device of claim 1, wherein, The stamping device (7) further comprises a pressure receiving plate (72), a supporting rod (73) and a stamp fixing plate (74), the guide shaft (71) is installed on the upper end surface of the pressure receiving plate (72), the pressure receiving plate (72) is connected with the stamp fixing plate (74) through the supporting rod (73), the stamp (75) is detachably connected in the stamp fixing plate (74), and the turnover device (8) abuts against the lower end surface of the stamp (75).

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