Return-to-zero automatic numbering machine with accurate hop count and adjustable joint and digital sinking functions

Abstract

The utility model provides a return-to-zero automatic numbering machine with accurate hop count and adjustable joint and number sinking, which comprises a handle and a casing, a machine handle frame is mounted in the casing, the handle penetrates through the casing to be connected with the machine handle frame, a main shaft is mounted in the machine handle frame in a penetrating manner, a plurality of character wheel sheets are sleeved on the main shaft, and an elastic bayonet lock component is mounted at one end of the main shaft in an embedded manner. A positioning groove is formed in one side of the machine handle frame, the end of the clamping pin assembly is clamped into the positioning groove, and the main shaft is limited by the positioning groove when ascending and descending. According to the zero-returning automatic numbering machine capable of achieving accurate hop count and adjustable joint and number sinking, the spindle and the side wall of the machine handle frame can be matched in a limiting mode through the clamping pin assembly, so that the situation that the spindle easily shakes or rotates to cause number dislocation or hop count on the character wheel piece is avoided, and the printing accuracy is guaranteed; the effect of printing the same number for multiple times is achieved through the cooperation of the debugging keys and different debugging sheets; and through the design of the character wheel sheet, the character wheel sheet can sink, so that one machine has multiple purposes, and diversified requirements of customers are met.

Description

Technical Field

[0001] The utility model relates to the technical field of numbering machines, in particular to an automatic numbering machine with accurate jump count and adjustable number sinking. Background Art

[0002] An automatic numbering machine is a product that numbers documents, bills, cartons, clothing, etc. At present, most automatic numbering machines on the market can sink numbers, but they use plastic rods to turn the character wheel piece in sequence to achieve zeroing, which is not very efficient. There is also an automatic numbering machine with a zeroing function that drives the spindle, spring and spindle steel ball to transfer to the character wheel piece by turning the zeroing knob, thereby achieving the purpose of zeroing operation. Patent No. 201920166193.6 discloses an automatic numbering machine with zeroing and digital sinking functions, including a handle, a handle device and a housing, the handle is elastically connected to the handle device, the handle device includes a handle rod and a handle frame, the handle rod vertically passes through the housing, the lower side of the housing is connected to a bottom plate, and the main shaft is centered inside it, and the main shaft passes through the handle frame installed inside the housing, and the handle frame is arranged with a number of character wheels rotating around the main shaft, and a cartridge rack is arranged near the character wheel piece and one side of the housing. The numbering machine achieves fast zeroing and the numbers sink, but when the numbers sink, the numbers will jump randomly, resulting in inaccurate number jumps and affecting product use. Therefore, it is necessary to improve the existing numbering machine. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] The problem to be solved by the utility model is to provide a zeroing automatic numbering machine with accurate jump count and adjustable number sinking. The word wheel can be made to sink (number sinking) by designing the word wheel; the main shaft position is fixed by a latch pin assembly, a positioning groove and a retaining spring piece, so as to avoid the number jumping caused by the vibration deviation of the main shaft when the number sinks; the word wheel is quickly reset to zero by a zeroing knob, so as to avoid the operation of manually using a dial to reset the word wheel in sequence; the adjustment key composition is matched with different adjustment links, so as to achieve the effect of repeated, continuous and multiple printing of the same number, so that the function of the numbering machine is more comprehensive and meets the various needs of customers.

[0005] (II) Technical solution

[0006] In order to solve the technical problem, the utility model provides a zero-reset automatic numbering machine with accurate jump count and adjustable digital sinking, including a handle, a handle device and a casing, wherein the handle is elastically connected to the handle device, the handle device includes a handle rod and a handle frame, the handle rod vertically passes through the casing, a bottom plate is connected to the lower side of the casing, a main shaft is centrally spanned inside the casing, the main shaft passes through the handle frame installed inside the casing, the two ends of the main shaft can be raised and lowered along the casing, a plurality of character wheels are mounted on the main shaft, a wheel connecting member, a balance finger The handle is pressed down to drive the machine handle frame and the main shaft to descend, so that the character wheel is pressed down for printing. An elastic pin assembly is embedded in one end of the main shaft, and a positioning groove is provided on one side of the machine handle frame. The end of the pin assembly is inserted into the positioning groove. The main shaft is limited by the positioning groove when it is lifted or lowered, and a retaining spring groove and a retaining spring sheet are provided on the other end to fix the position of the pin assembly and the positioning groove, so that the main shaft will not vibrate and deviate, thereby ensuring the stability of the position of the sunken character wheel and achieving the purpose of accurate jump count.

[0007] In some embodiments, the spindle surface is grooved, and an elastic bayonet assembly is embedded in one end; the other end is provided with a retaining spring groove and a built-in threaded hole, the retaining spring sheet is installed in the retaining spring groove, and the zeroing knob is connected to the threaded hole.

[0008] In some embodiments, the character wheel plates are all provided with a concave notch, and the concave notch can be at any position of the character wheel plate. We take 0 to 1 as an example. The character wheel plates are divided into circular hole-shaped and elliptical hole-shaped according to the shape of the center hole, wherein the single-digit character wheel plates are circular hole-shaped, and the center holes of the character wheel plates of the remaining digits are elliptical hole-shaped. Both are built-in wheel connecting parts, and there is a connecting part protrusion in the wheel connecting part. The inner side of the elliptical hole-shaped character wheel plate has a wheel protrusion. When the number is reset to zero, use the dial to dial the number slightly forward and downward, and then withdraw it. The wheel protrusion on the elliptical hole-shaped character wheel plate just enters the main shaft with a groove, and the character wheel plate will sink, so that the number cannot be printed.

[0009] In some embodiments, the bayonet assembly includes a bayonet and a spring, wherein the spring is sleeved on the bayonet, a mounting hole is provided on the main shaft, the bottom of the bayonet is inserted into the mounting hole, and the top end is placed in the positioning groove.

[0010] In some embodiments, the balance indicator piece can maintain balance with the character wheel piece after the machine is reset to zero, and at this time, the pin assembly is just in the positioning groove.

[0011] In some embodiments, a rear cover is flipped and installed in the housing, and a coupling key assembly and a movable claw frame are hinged on the rear cover. The coupling key assembly includes a coupling plate and a coupling key. The coupling plate is hinged on the rear cover, and the coupling key is slidably installed on the coupling plate. The driving claw is arranged at one end of the coupling key, and the coupling plate is located at the other end of the driving claw and is also arranged with a plurality of movable claws of different lengths. A clip is installed on the top of the coupling key through a torsion spring, and the clip is pressed against the coupling plate to fix the coupling key. A slot is provided on one side of the movable claw frame, and a driving claw matching the slot is provided in the coupling key assembly. When the coupling key clip is aligned with the 1 on the coupling plate, the driving claw is inserted into the slot, and the coupling key assembly drives the movable claw to contact the gear on the character wheel, and the character wheel can jump in sequence. For example, 001, 002, 003, 004...

[0012] In some embodiments, when the adjustment key clip is aligned with the 0 on the adjustment plate, the driving claw contacts one side of the machine handle frame, and the adjustment key component drives the moving claw to have no contact with the gear on the character wheel. At this time, the character wheel cannot jump and the number remains unchanged.

[0013] In some embodiments, a plurality of adjustment plates of different shapes are arranged between the movable claw frame and the character wheel, the driving claw cooperates with the adjustment plates, and when the adjustment key clip is aligned with 2 on the adjustment plate, the driving claw contacts the 2-adjustment plates, and the adjustment key assembly drives the movable claw to contact the gear on the character wheel, and at this time the character wheel repeats the jump count twice. For example, 001, 001; 002, 002; 003, 003...

[0014] In some embodiments, when the adjustment key clip is aligned with the 3 on the adjustment plate, the driving claw contacts the 3-link adjustment plate, and the adjustment key assembly drives the moving claw to contact the gear on the character wheel, and the character wheel repeats the number jump 3 times. For example, 001, 001, 001; 002, 002, 002; 003, 003, 003...

[0015] In some embodiments, when the adjustment key clip is aligned with the 4 on the adjustment plate, the driving claw contacts the 4-link adjustment plate, and the adjustment key assembly drives the moving claw to contact the gear on the character wheel, and the character wheel repeats the number jump 4 times. For example, 001, 001, 001, 001; 002, 002, 002, 002; 003, 003, 003, 003...

[0016] In some embodiments, a bottom cover is provided at the bottom of the casing, and the bottom cover is hollow so that the character wheel can pass through. A return spring is provided in the handle, and an ink cartridge rack is connected to the handle frame through a connecting rod. An ink cartridge clip is elastically provided on the ink cartridge rack, and the ink cartridge rack is located below the character wheel.

[0017] (III) Beneficial effects

[0018] The utility model provides an automatic zeroing numbering machine with accurate jump count and adjustable number sinking. The word wheel can be made to sink (number sink) by designing the word wheel; the main shaft position is fixed by a latch pin assembly, a positioning groove and a retaining spring piece, so that the number jump caused by the vibration deviation of the main shaft when the number sinks is avoided; the word wheel is quickly reset to zero by a zeroing knob, so that the operation of manually using a dial stick to reset the word wheel in sequence is avoided; the adjustment key composition is matched with different adjustment links, so as to achieve the effect of repeated, continuous and multiple printing of the same number, so that the function of the numbering machine is more comprehensive and meets the various needs of customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a three-dimensional diagram of a zero-reset automatic numbering machine with accurate jump count and adjustable number sinking according to the utility model;

[0021] Figure 2 It is an inverted stereogram of a zero-reset automatic numbering machine with accurate jump count and adjustable number sinking according to the utility model;

[0022] Figure 3 This is a three-dimensional diagram of the internal structure of the casing of an automatic numbering machine with accurate jump count and adjustable number sinking according to the utility model;

[0023] Figure 4 This is a three-dimensional diagram of the housing and the internal structure of the handle of the automatic numbering machine with accurate jump count and adjustable number sinking according to the utility model;

[0024] Figure 5 It is a three-dimensional diagram of the handle frame of the automatic numbering machine with accurate jump count and adjustable number sinking according to the utility model;

[0025] Figure 6 This is a three-dimensional diagram of the main shaft and the latch assembly of the automatic numbering machine with accurate jump count and adjustable number sinking according to the utility model;

[0026] Figure 7 This is a three-dimensional diagram of the main shaft structure of a zero-reset automatic numbering machine with accurate jump count and adjustable digital sinking according to the utility model;

[0027] Figure 8 This is a three-dimensional diagram of the main shaft structure of the utility model of an automatic numbering machine with accurate jump count and adjustable number sinking, which is another perspective;

[0028] Fig. 9 It is a three-dimensional diagram of the combination of the adjustment keys of the automatic numbering machine with accurate jump count, adjustable number and digit sinking, which is provided by the utility model;

[0029] Fig.10 It is a three-dimensional diagram of the connection between the main shaft and the character wheel of the automatic numbering machine with accurate jump count and adjustable number sinking according to the utility model;

[0030] Fig.11 It is a schematic diagram of the second joint adjustment joint piece structure of the utility model of a zero-reset automatic numbering machine with accurate jump count and adjustable joint and digital sinking;

[0031] Fig.12 It is a schematic diagram of the third joint adjustment joint piece structure of a zero-reset automatic numbering machine with accurate jump count and adjustable joint and digital sinking according to the utility model;

[0032] Fig.13 It is a schematic diagram of the fourth joint adjustment piece structure of the automatic numbering machine with accurate jump count, adjustable joint and digital sinking according to the utility model;

[0033] Fig.14 This is an exploded view of the main shaft of the automatic numbering machine with accurate jump count and adjustable number sinking, as well as each character wheel and wheel connecting piece of the utility model;

[0034] Fig.15 This is a three-dimensional diagram of the balance indicator of the automatic numbering machine with accurate jump count and adjustable digital sinking according to the utility model;

[0035] Fig.16 It is a three-dimensional diagram of the unit digit wheel of the automatic numbering machine with accurate jump count and adjustable digit sinking according to the utility model;

[0036] Fig.17 The utility model is a three-dimensional diagram of the remaining character wheel plates of a zero-reset automatic numbering machine with accurate jump count and adjustable number sinking.

[0037] The names of the components corresponding to the various figure marks in the figure are: 1. handle; 1A, machine handle rod; 2. casing; 3. machine handle frame; 4. main shaft; 5. character wheel; 6. positioning groove; 7. back cover; 8. movable claw frame; 9. slot; 10. driving claw; 11. latch; 12. spring; 13. mounting hole; 14. adjustment plate; 15. adjustment key; 16. movable claw; 17. clip; 18. adjustment plate; 19. gear; 20. balance indicator plate; 21. retaining spring; 21A, retaining spring groove; 22. zeroing knob; 23. wheel connector; 24. storage slot; 25. concave notch; 26. bottom cover; 27. reset spring; 28. connecting rod; 29. ​​cartridge holder; 30. cartridge clamp; 31. wheel protrusion; 32. connector protrusion. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0039] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0040] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0041] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0042] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0043] See also Figure 1 to Figure 17 The utility model provides a zero-reset automatic numbering machine with accurate jump count and adjustable digital sinking, comprising a handle 1, a handle device and a casing 2, wherein the handle 1 is elastically connected to the handle device, the handle device comprises a handle rod 1A and a handle frame 3, the handle rod 1A vertically passes through the casing 2 to connect the handle frame 3, and is characterized in that: a main shaft 4 is installed across the handle frame 3, and both ends of the main shaft 4 can be lifted and lowered along the casing 2, and a plurality of character wheels 5, a wheel connecting piece 23, a balance indicating piece 20 and an adjusting linking piece 18 are installed on the main shaft 4, and an elastic bayonet assembly 11, 12 is embedded in one end of the main shaft 4, a positioning groove 6 is provided on one side of the handle frame 3, and the end of the bayonet assembly is inserted into the positioning groove 6, and the main shaft 4 is limited by the positioning groove 6 when lifting and lowering, and a retaining spring groove 21A and a retaining spring piece 21 are provided at the other end thereof, which are used to fix the position of the bayonet assembly and the positioning groove. The main shaft 4 will not vibrate and deviate, thereby ensuring the stability of the position of the sinking character wheel piece and achieving the purpose of accurate jump count.

[0044] The bayonet assembly includes a bayonet 11 and a spring 12, the spring 12 is sleeved on the bayonet 11, a mounting hole 13 is provided on the spindle 4, the bottom of the bayonet 11 is inserted into the mounting hole 13, one side of the positioning groove 6 protrudes outward to form a locking portion, the spring 12 pushes the bayonet 11 out to place it in the locking portion, at this time the bayonet 11 locks the spindle 4 on the handle frame 3, the elastic force of the spring 12 needs to be overcome to make the bayonet 11 shrink into the mounting hole 13 in order to make the spindle 4 rotate; a retaining spring groove 21A and a retaining spring sheet 21 are fixed at one end of the spindle 4, the retaining spring sheet 21 is close to one side of the handle frame 3, and the spindle 4 is located at one end of the retaining spring sheet 21. The threaded hole is connected to the zeroing knob 22; refer to Figure 10-17, a storage groove 24 is provided in the character wheel 5, and a concave notch 25 is extended outward on one side of the storage groove 24, and a wheel connecting piece 23 is placed in the storage groove 24 and the end is inserted into the concave notch 25. The character wheel 5 is divided into a circular hole shape or an elliptical hole shape according to the shape of the center hole, wherein the center hole of the single-digit character wheel is a circular hole shape, and the center hole of the other character wheel pieces is an elliptical hole shape, and both are built with a wheel connecting piece 23, and one end of the wheel connecting piece 23 has a connecting piece protrusion, wherein the inner side of the elliptical hole character wheel piece has a wheel protrusion 31, and the wheel connecting piece 23 is provided with a connecting piece protrusion 32; the adjustment coupling key composition includes an adjustment coupling plate 14 and an adjustment coupling key 15, and the adjustment The coupling plate 14 is hinged on the rear cover 7, the coupling key 15 is slidably installed on the coupling plate 14, the driving claw 10 is set at one end of the coupling key 15, and the coupling plate 14 is located at the other end of the driving claw 10 and is also arranged with a plurality of movable claws 16 of different lengths. A clip 17 is installed on the top of the coupling key 15 through a torsion spring, and the clip 17 is close to the coupling plate 14 to fix the coupling key 15. A plurality of coupling plates 18 of different shapes are arranged between the movable claw frame 8 and the character wheel piece 5, the driving claw 10 cooperates with the coupling plate 18, and a gear is provided on one side of the character wheel piece 5, the movable claw 16 cooperates with the gear 19, and a balance indicator plate 20 is provided between the coupling plate 18 and the character wheel piece 5.

[0045] When working, first turn the numbering machine upside down with the letter wheel 5 facing upward, press the bottom plate 26 downward to move the machine handle rod 1A and the machine handle frame 3 upward, and when the two sides of the machine handle frame 3 are against the bottom plate 26, use the zeroing knob 22 to rotate to drive the main shaft 4 to rotate, and the main shaft 4 drives the wheel connecting piece 23 to rotate through the connecting piece protrusion 32 that is inserted into the groove. When one end of the wheel connecting piece 23 is inserted into the concave notch 25 of the letter wheel 5, the letter wheel 5 is pushed together to rotate to the number zero, thereby realizing the zeroing operation. At the same time, the pin assembly will also rotate with the main shaft 4 in the hole on one side of the machine handle frame 3. When the number is reset to zero, the balance indicator piece 20 is balanced with the letter wheel 5, and the pin assemblies 11 and 12 are just in the positioning groove 6. The concave notch 25 can be at any position of the letter wheel 5, Fig.10 In this example, we take numbers between 0 and 1.

[0046] When the number is reset to zero, use the lever to push the character wheel 5 slightly forward and downward, then withdraw it, the wheel protrusion 31 on the oval hole character wheel just enters the main shaft 4 with grooves, and the oval hole character wheel will sink. The round hole character wheel cannot sink without the wheel protrusion. The oval hole character wheel and the round hole character wheel are not on the same horizontal plane, so the numbers on the oval hole character wheel cannot be printed. For example, the original 3-digit machine normally prints 001, 002, 003..., and some customers require that the front number 0 is not required, then the oval hole character wheel is sunk, and 1, 2, 3, 4, 5... are printed.

[0047] When the numbering machine is placed normally, the handle 1 is pressed down, so that the machine handle rod 1-A and the machine handle frame 3 move downward, and the connecting rod 28 drives the ink cartridge frame 29 to flip outward as a whole along with the machine handle frame 3, so that the surface of the character wheel 5 can pass through the bottom cover 26 for printing. A reset spring 27 is arranged in the handle 1, which can drive the machine handle frame 3 to reset; the machine handle frame 3 is connected to the ink cartridge frame 29 through the connecting rod 28, and the ink cartridge frame 29 is provided with an ink cartridge clamp 30. The ink cartridge frame 29 is located below the character wheel 5, and an ink pad is installed on the ink cartridge frame 29 through the ink cartridge clamp 30, which is placed below the character wheel 5 for inking when resetting.

[0048] Since the wheel piece 5 has a wheel piece connector 23 and the connector protrusion 32 is stuck in the groove of the main shaft 4, the main shaft 4 is stationary, the wheel piece connector 23 is also stationary, and the outer word wheel piece 5 rotates under the action of the movable claw to achieve digital jump. When the elliptical hole-shaped word wheel piece sinks, the wheel piece protrusion 31 on the elliptical hole-shaped word wheel piece just enters the main shaft 4 with grooves, and the end of the bayonet assembly is stuck in the positioning groove 6. The main shaft 4 is limited by the positioning groove 6 when it is lifted and lowered. The other end is provided with a spring groove 21A and a spring piece 21, which are used to fix the position of the bayonet assembly and the positioning groove. The main shaft 4 will not vibrate and deviate, thereby ensuring the stability of the position of the sinking word wheel piece and achieving the purpose of accurate jump number.

[0049] Due to the actual use needs of customers, when the adjustment key clip 17 is aligned with the number 1 on the adjustment plate 14, the driving claw 10 is inserted into the slot 9, and the movable claw 16 contacts the gear 19 on the character wheel. At this time, the character wheel 5 can jump in sequence. For example, 001, 002, 003, 004...

[0050] When the adjustment key clip 17 is aligned with the number 0 on the adjustment plate 14, the driving claw 10 contacts one side of the machine handle frame 3, and the movable claw 16 does not contact the gear 19 on the character wheel. At this time, the character wheel 5 cannot jump and the number remains unchanged.

[0051] When the adjustment key clip 17 is aligned with the 2 on the adjustment plate 14, the driving claw 10 is connected with the 2 adjustment plate ( Fig.11 The movable claw 16 contacts the gear 19 on the character wheel, and the character wheel 5 repeats the jump twice. For example, 001, 001; 002, 002; 003, 003...

[0052] When the adjustment key clip 17 is aligned with the 3 on the adjustment plate 14, the driving claw 10 is aligned with the 3-way adjustment plate ( Fig.12 The movable claw 16 contacts the gear 19 on the character wheel, and the character wheel 5 repeats the number jump three times. For example, 001, 001, 001; 002, 002, 002; 003, 003, 003...

[0053] When the adjustment key clip 17 is aligned with the 4 on the adjustment plate 14, the driving claw 10 is connected with the 4 adjustment plate ( Fig.13The movable claw 16 contacts the gear 19 on the character wheel, and the character wheel 5 repeats the number jump 4 times. For example, 001, 001, 001, 001; 002, 002, 002, 002; 003, 003, 003, 003...

[0054] The utility model provides an automatic zeroing numbering machine with accurate jump count and adjustable number sinking. The word wheel can be made to sink and the numbers can be sunk by designing the word wheel; the main shaft position is fixed by a latch pin assembly, a positioning groove and a retaining spring to avoid random number jumps caused by the vibration and deviation of the main shaft when the numbers sink; the word wheel can be quickly zeroed by a zeroing knob to avoid the operation of manually using a dial to zero the word wheel in sequence; the adjustment key composition is coordinated with different adjustment plates to achieve the effect of repeated, continuous and multiple printing of the same number, so that the function of the numbering machine is more comprehensive and meets the various needs of customers.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An automatic numbering machine with accurate jump count and adjustable digital sinking, comprising a handle (1), a handle device and a housing (2), wherein the handle (1) is elastically connected to the handle device, the handle device comprises a handle rod (1A) and a handle frame (3), the handle rod (1A) vertically passes through the housing (2) and is connected to the handle frame (3), characterized in that: A main shaft (4) is installed across the handle frame (3), and both ends of the main shaft (4) can be raised and lowered along the casing (2). The main shaft (4) is equipped with a plurality of character wheels (5), a wheel connecting piece (23), a balance indicator piece (20) and an adjustment piece (18). An elastic bayonet assembly is embedded in one end of the main shaft (4). A positioning groove (6) is provided on one side of the handle frame (3), and the end of the bayonet assembly is inserted into the positioning groove (6). The main shaft (4) is limited by the positioning groove (6) when it is raised and lowered. A retaining spring groove (21A) and a retaining spring piece (21) are provided at the other end to fix the position of the bayonet assembly and the positioning groove, so that the main shaft (4) will not vibrate and deviate, thereby ensuring the stability of the position of the sunken character wheel and achieving the purpose of accurate jump count.

2. The automatic numbering machine with accurate jump count and adjustable number sinking as claimed in claim 1, characterized in that: A rear cover (7) is flipped and installed inside the housing (2), and an adjustment key assembly and a movable claw frame (8) are hingedly connected to the rear cover (7). A slot (9) is provided on one side of the movable claw frame (8), and a driving claw (10) that cooperates with the slot (9) is provided inside the adjustment key assembly.

3. The automatic numbering machine with accurate jump count and adjustable number sinking as claimed in claim 1, characterized in that: The bayonet pin assembly comprises a bayonet pin (11) and a spring (12), wherein the spring (12) is sleeved on the bayonet pin (11), the main shaft (4) is slotted and provided with a mounting hole (13), the bottom of the bayonet pin (11) is inserted into the mounting hole (13), and the top end is placed in the positioning groove (6).

4. The automatic numbering machine with accurate jump count and adjustable number sinking as claimed in claim 2, characterized in that: The coupling key component comprises a coupling plate (14) and a coupling key (15), wherein the coupling plate (14) is hinged on the rear cover (7), and the coupling key (15) is slidably mounted on the coupling plate (14), the driving claw (10) is arranged at one end of the coupling key (15), and the coupling plate (14) is located at the other end of the driving claw (10) and is also provided with a plurality of movable claws (16) of different lengths.

5. The automatic numbering machine with accurate jump count and adjustable number sinking as claimed in claim 4, characterized in that: A clip (17) is installed on the top of the adjustment key (15) via a torsion spring, and the clip (17) is closely pressed against the adjustment plate (14) to fix the adjustment key (15).

6. The automatic numbering machine with accurate jump count and adjustable number sinking as claimed in claim 4, characterized in that: A plurality of adjustment plates (18) of different shapes are arranged between the movable claw frame (8) and the character wheel plate (5), the driving claw (10) cooperates with the adjustment plates (18), one side of the character wheel plate (5) is provided with a gear, the movable claw (16) cooperates with the gear (19), and a balance indicator plate (20) is arranged between the adjustment plates (18) and the character wheel plate (5).

7. The automatic numbering machine with accurate jump count and adjustable number sinking as claimed in claim 1, characterized in that: A retaining spring groove (21A) and a retaining spring sheet (21) are fixed to one end of the main shaft (4), the retaining spring sheet (21) is close to one side of the machine handle frame (3), and a threaded hole is built into one end of the main shaft (4) located on the retaining spring sheet (21) and is connected to a zero return knob (22).

8. The automatic numbering machine with accurate jump count and adjustable number sinking as claimed in claim 1, characterized in that: A plurality of wheel connecting members (23) are mounted on the main shaft (4); a storage groove (24) is provided inside the character wheel (5); a concave notch (25) is provided on one side of the storage groove (24) extending outward; the wheel connecting member (23) is placed in the storage groove (24) and the end thereof is inserted into the concave notch (25); the character wheel (5) is divided into a circular hole shape or an elliptical hole shape according to the shape of the center hole; both of them are equipped with the wheel connecting member (23); the single digit character wheel is a circular hole shape, and the center hole of the remaining digit character wheel is an elliptical hole shape, and a wheel protrusion (31) is provided inside the center hole; and a connecting member protrusion (32) is provided inside the wheel connecting member (23).

9. The automatic numbering machine with accurate jump count and adjustable number sinking as claimed in claim 1, characterized in that: A bottom plate (26) is provided at the bottom of the casing (2), the bottom plate (26) is hollow so that the character wheel (5) can pass through, and a return spring (27) is provided inside the machine handle rod (1A).

10. The automatic numbering machine with accurate jump count and adjustable number sinking as claimed in claim 1, characterized in that: The handle frame (3) is connected to an ink cartridge frame (29) via a connecting rod (28); an ink cartridge clamp (30) is provided on the ink cartridge frame (29); and the ink cartridge frame (29) is located below the character wheel (5).

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