CN111439021A

CN111439021A - Transfer printing machine for scale lines of syringe needle cylinder

Info

Publication number: CN111439021A
Application number: CN202010419370.4A
Authority: CN
Inventors: 罗昌昊
Original assignee: Yuhuan Maike Automation Plastic Machine Co ltd
Current assignee: Yuhuan Maike Automation Plastic Machine Co ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-07-24

Abstract

The invention provides a pad printing machine for scale marks of a syringe needle cylinder, belonging to the technical field of machinery. The needle cylinder printing direction-keeping device solves the problem that in the prior art, the structure arrangement is unreasonable while the printing direction of the needle cylinder is ensured to be consistent. The automatic stamping device comprises a frame, a rotary table, arrange the device of becoming of carousel one side, be located the carousel top and with the fixed annular cam of frame mutually and be located annular cam inboard and can be with the together pivoted annular revolving stage of carousel, wear to be equipped with on the annular revolving stage and carry out gliding guide arm from top to bottom by the drive of annular cam up end, the guide arm is fixed with annular revolving stage circumference, the guide arm lower extreme is fixed with the position sleeve, the position sleeve lower extreme mask has the lug, wear to be equipped with the depression bar that the lower extreme stretched into in the position sleeve in the guide arm, the depression bar upper end is worn out outside the guide arm and is equipped with between the two with the spring one that the depression bar upwards pushed up, be fixed with the stopper in the annular cam top in the frame, the. It has advantages such as structural arrangement is reasonable, printing accuracy is high.

Description

Transfer printing machine for scale lines of syringe needle cylinder

Technical Field

The invention belongs to the technical field of machinery, and relates to a pad printing machine for scale lines of a syringe.

Background

At present, the printing of the scale marks on the syringe is basically finished by a pad printing machine. The traditional pad printing machine is very simple and comprises a rotary disc which can rotate and is provided with an arc notch at the edge and a printing device arranged on one side of the rotary disc, wherein the side part of a needle cylinder is clamped at the arc notch, then the needle cylinder is conveyed to the printing device by the rotary disc to form contact, and the printing device drives the needle cylinder to rotate relative to the rotary disc to complete printing. However, in actual mass production, it has been found that the orientation of each cylinder cannot be maintained until it comes into contact with the printing apparatus, resulting in deviation in the orientation of the scale marks printed on each cylinder.

In order to solve the above problems, the chinese patent proposes a pad printing machine of 200920315249.6 application number for cylinder scale marks, which comprises a machine base and a rotary table arranged on the machine base, the rotary table is connected with a power mechanism, the power mechanism can drive the rotary table to rotate on the machine base, the edge of the rotary table is provided with a plurality of positioning notches which are uniformly distributed along the circumference and can position the cylinder ear seats, the side part of the rotary table is provided with a scale mark forming device which can be abutted against the outer side wall of the cylinder arranged at the positioning notches, the rotary table is connected with a pressure lever which can rotate together with the rotary table and can slide up and down relative to the rotary table, a lifting mechanism which can lift the pressure lever along with the rotation of the rotary table is arranged between the upper end of the pressure lever and the machine base, the lower end of the pressure lever corresponds to the position of the positioning notches, a jacking mechanism is arranged on the machine base opposite to the scale mark forming device, and the jacking mechanism and the pressure lever can be jacked at the two ends of the cylinder and away from the positioning notch. The positioning notches are arranged on the rotary disc, so that the needle cylinders before printing are completely consistent in orientation, and the printed scale marks can be kept consistent in orientation.

However, the pad printing machine for the needle cylinder scale marks has some defects: the needle cylinder lug seat is required to be separated from the positioning notch during printing, the separation of the needle cylinder lug seat and the positioning notch depends on that a jacking mechanism capable of jacking the needle cylinder lug seat upwards is correspondingly arranged below the edge of the rotary table, but the position below the rotary table in the complete pad printing system is very crowded and complicated (because a plurality of transmission mechanisms are arranged below the rotary table), the arrangement of the jacking mechanism can make the structural arrangement of the position more unreasonable, and the distance between the jacking mechanism and a scale mark printing device cannot be too large or too small, and the too large situation can cause insufficient contact to form printing and the too small situation can cause interference. In this case, the conventional technical means of those skilled in the art is to make the volume as large as possible so that there is enough space below the turntable to be able to arrange.

Disclosure of Invention

The invention aims to provide a pad printing machine for scale lines of a syringe of an injector aiming at the problems in the prior art, and solves the problem of unreasonable structural arrangement while ensuring consistent printing directions of the syringe.

The purpose of the invention can be realized by the following technical scheme:

the bat printing machine for the scale marks of the syringe needle cylinder comprises a machine frame, a rotary table capable of rotating, a printing device arranged on one side of the rotary table, an annular cam positioned above the rotary table and fixed with the machine frame, and an annular rotary table positioned on the inner side of the annular cam and capable of rotating together with the rotary table, a guide rod which can slide up and down under the drive of the upper end surface of the annular cam is arranged on the annular turntable in a penetrating way, the highest position of the upper end surface of the annular cam corresponds to the printing device, the needle cylinder lug positioning mechanism is characterized in that the guide rod is circumferentially fixed with the annular rotary table, a positioning sleeve is fixed at the lower end of the guide rod, a lug which can abut against the side part of the needle cylinder lug seat to position the needle cylinder lug seat is arranged on the lower end face of the positioning sleeve, a pressure rod with the lower end extending into the positioning sleeve penetrates through the guide rod, a first spring which pushes the pressure rod upwards is arranged between the pressure rod and the guide rod, a limiting block is fixed above the annular cam on the rack, and the upper end of the pressure rod abuts against the lower end face of the limiting block when the guide rod slides upwards.

In an initial state, the lower end of the guide rod is positioned at a low position, so that the side parts of the needle cylinder lug seats can be abutted against the convex blocks to form positioning of the needle cylinder, and the position of the needle cylinder before printing can be kept consistent. When the turntable rotates to the position where the needle cylinder is located in the printing device, the guide rod is lifted downwards under the action of the highest position of the upper end surface of the annular cam, so that the lug is separated from the needle cylinder lug seat. Meanwhile, the upper end of the compression bar is abutted against the lower end face of the limiting block, so that the compression bar cannot be lifted upwards along with the guide rod, and the lower end of the compression bar is equivalent to extend out of the positioning sleeve and abut against the end face of the needle cylinder lug. The lug is separated from the needle cylinder lug seat, so that the needle cylinder can rotate by matching with the action of the printing device to complete the printing of the scale mark; and the action of the pressure lever ensures that the needle cylinder cannot jump upwards in the printing process, thereby ensuring the printing reliability of the needle cylinder. Through the setting of above-mentioned structure for the cylinder not only can be fixed a position before the printing, need not to be lifted up again when the printing simultaneously, can directly realize the release of cylinder location by the upwards slip of guide arm, and prevent upwards beating of cylinder with the help of the downward promotion of depression bar, the use of mechanism is held in top has been cancelled from this, and the cooperation of depression bar and arc piece etc. all sets up the space in annular convex part top, upwards arrange in other words and reduce the requirement in horizontal space, thereby make the structure can make things convenient for more, arrange rationally.

In the syringe needle cylinder scale mark pad printing machine, the number of the guide rods is two, the two guide rods penetrate through the annular rotary table, the lower ends of the two guide rods are fixed on a connecting block, the positioning sleeve is fixed with the connecting block at the position of one guide rod, and the pressure rod penetrates through the guide rod.

The lower ends of the two guide rods are fixed on a connecting block, and the two guide rods penetrate through the annular rotary table, so that the guide rods cannot rotate in the process of rotating along with the rotary table, and the circumferential fixation of the guide rods and the rotary table is realized. The positioning sleeve is fixed with the connecting block, so that the positioning sleeve cannot rotate, the positioning sleeve and the turntable can keep static to position the needle cylinder by using the convex block, and the position of the needle cylinder before printing can be kept consistent.

In the syringe needle cylinder scale mark pad printing machine, the upper ends of the two guide rods are fixed with a connecting block, the side part of the connecting block is connected with a first rolling bearing, and the peripheral wall of the first rolling bearing abuts against the upper end face of the annular cam.

The upper ends of the two guide rods are fixed with the connecting block, when the rolling bearing rolls from the lowest position to the highest position of the upper end face of the annular cam, the connecting block can smoothly lift the connecting block upwards through the two guide rods, and therefore the convex block on the positioning sleeve can be smoothly separated from the needle cylinder lug seat, and the needle cylinder can rotate to complete printing.

In the syringe needle cylinder scale mark pad printing machine, the lower end face of the limiting block is provided with a boss corresponding to the highest position of the upper end face of the annular cam, and a guide face which can enable the upper end of the pressure rod to move from the lower end face of the limiting block to the lower end face of the boss is connected between the lower end face of the boss and the lower end face of the limiting block.

The setting of boss for the depression bar can further move downwards when upwards being lifted by the guide arm, has ensured that the depression bar can firmly support and prevent its upwards beating on the syringe ear seat, moves the rationality of seal machine structure arrangement with this syringe scale mark of syringe with ensureing.

In the syringe needle cylinder scale mark pad printing machine, the upper end of the pressure rod is fixed with the connecting seat, the side part of the connecting seat is provided with the second rolling bearing capable of rotating, when the turntable rotates, the second rolling bearing can roll along the lower end surface of the limiting block, the spring is sleeved outside the pressure rod, and two ends of the first spring respectively abut against the connecting block and the connecting seat.

And the second rolling bearing can form rolling friction with the limiting block when the turntable rotates, so that the action of the pressure lever can be more sensitive. Meanwhile, two ends of the first spring are respectively abutted against the connecting block and the connecting seat, so that when the rolling bearing is put on the lowest position of the upper end face of the annular cam again, the elastic force of the first spring naturally acts upwards on the connecting seat to enable the first spring to jack the pressing rod upwards, and the lower end of the pressing rod can automatically retract into the positioning sleeve to avoid interference between the pressing rod and the lug.

In the syringe needle cylinder scale mark pad printing machine, the pressure lever comprises a rod body penetrating through the guide rod and a connector fixed at the lower end of the rod body, a concave cavity is formed in the lower end face of the positioning sleeve, the connector is located in the concave cavity, the upper end face of the connector is abutted against the top wall of the concave cavity under the elastic action of the first spring, and the lower end of the connector is connected with an abutting head and a one-way bearing is arranged between the abutting head and the concave cavity.

The upper end face of the connector abuts against the top wall of the cavity under the action of the elastic force of the first spring, the distance of the pressure rod extending out of the guide rod can be controlled, the first rolling bearing is prevented from being higher than the upper end face of the limiting block, the pressure rod can be ensured to be smoothly matched with the limiting block, and therefore the pressure rod can be controlled to be pushed downwards to be matched with the needle cylinder to ensure normal printing during printing.

In addition, when the syringe is printed, the pressure lever is blocked by the limiting block and cannot move upwards, the lower end of the pressure lever props against the syringe lug, and the lower end of the pressure lever generates larger friction force on the syringe lug in the state. Therefore, the abutting head and the one-way bearing are arranged, the abutting head is contacted with the needle cylinder lug seat, and simultaneously the abutting head can rotate relative to the pressure rod through the one-way bearing, namely the abutting head rotates along with the needle cylinder during printing, so that friction between the abutting head and the pressure rod during rotation of the needle cylinder can be prevented. The connector makes up the defect that the rod body needs to be arranged in the guide rod in a penetrating mode and cannot be directly provided with the one-way bearing and the abutting head.

In the syringe needle cylinder scale mark pad printing machine, the lower end face of the connector is provided with a mounting hole, the abutting head is provided with a convex column inserted into the mounting hole, and the one-way bearing is arranged between the convex column and the mounting hole.

In the syringe needle cylinder scale mark pad printing machine, the positioning sleeve is internally provided with a straight hole with a lower port communicated with the concave cavity, the upper end surface of the connector is provided with a connecting column extending into the straight hole, and the lower end surface of the rod body is provided with a matching column in threaded connection with the matching column.

In the syringe needle cylinder scale mark pad printing machine, a connecting rod penetrates through the other guide rod, the upper end of the connecting rod extends out of the guide rod and is fixed with the connecting seat, a second spring is sleeved on the connecting rod, and two ends of the second spring are respectively abutted against the connecting seat and the connecting block.

The upper ends of the two rod bodies are fixed with the connecting seat, and the two rod bodies are respectively arranged in the two guide rods in a penetrating mode, so that the two rod bodies are circumferentially fixed with the annular rotary table and cannot rotate, and the abutting heads can more smoothly slip relative to the corresponding pressing rods when printing to prevent the needle cylinder from being abraded.

Compared with the prior art, the pad printing machine for the scale lines of the syringe needle cylinder can be positioned before printing, simultaneously the use of a jacking mechanism is eliminated, and the requirement on the transverse space is reduced by upward arrangement, so that the structure can be arranged more conveniently and reasonably.

Drawings

FIG. 1 is a schematic view of the present syringe cylinder graduation line pad printing machine (when the first spring and the second spring are not connected).

FIG. 2 is a schematic connection diagram of two guide rods (when the first spring and the second spring are not connected) in the syringe graduation line pad printing machine.

Fig. 3 is another angle schematic of fig. 2.

FIG. 4 is a longitudinal cross-sectional view of the present syringe cylinder graduation mark bat printing machine at the position of two guide rods.

FIG. 5 is a schematic view of the space between the pressing rod and the limiting block when the guide rod is at a low position.

FIG. 6 is a schematic view of the pressure bar and the stop block when the guide bar is lifted upward.

In the figure, 1, a frame; 2. a turntable; 2a, a circular arc notch; 3. a ring cam; 4. an annular turntable; 5. a guide bar; 6. a positioning sleeve; 6a, a bump; 6b, a concave cavity; 7. a pressure lever; 7a, a rod body; 7a1, mating posts; 7b, a connector; 7b1, connecting column; 8. a first spring; 9. a limiting block; 9a, a boss; 10. a coupling block; 11. connecting blocks; 12. a first rolling bearing; 13. a connecting seat; 14. a second rolling bearing; 15. abutting against the head; 15a, a convex column; 16. a one-way bearing; 17. a connecting rod; 18. a second spring; 19. a circular ring plate; 20. a pillar; 21. and (7) a supporting block.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, the pad printing machine for scale marks of syringe needle cylinder comprises a frame 1 and a rotary table 2 arranged at the inner side of the frame 1, wherein the rotary table 2 can be driven by a power mechanism (the power mechanism can be a motor) to rotate relative to the frame 1, an arc notch 2a is arranged at the edge of the rotary table 2, and the side part of the syringe needle can be clamped in the arc notch 2 a. An annular plate positioned on the outer side of the turntable 2 is fixed on the frame 1, a printing device is arranged on one side of the annular plate, and a notch is formed in the side part of the annular plate. The needle cylinder is conveyed to the notch and clamped to the arc notch 2a, and then the needle cylinder is conveyed to the printing device by the rotary disc 2 to print the scale marks.

As shown in fig. 1-4, a ring cam 3 is fixed on the frame 1, the ring cam 3 is located above the turntable 2, and the highest position of the upper end surface of the ring cam 3 corresponds to the printing device. The inner side of the annular cam 3 is provided with an annular rotary table 4, and the annular rotary table 4 and the rotary table 2 can be driven to rotate by the same power mechanism. The annular rotary table 4 is provided with a guide rod 5 which can slide up and down under the drive of the upper end surface of the annular cam 3, and the guide rod 5 and the annular rotary table 4 are circumferentially fixed. The lower end of the guide rod 5 is fixed with a positioning sleeve 6, the lower end surface of the positioning sleeve 6 is provided with a convex block 6a which can be abutted against the needle cylinder ear seat to position the needle cylinder ear seat, and the position of the convex block 6a corresponds to the position of the circular arc notch 2 a. The upper end of the guide rod 5 is fixed with a connecting block 11, a rolling bearing 12 capable of rotating is arranged on the side portion of the connecting block 11, and the peripheral wall of the rolling bearing 12 abuts against the upper end face of the annular cam 3.

As shown in fig. 1-4, the guide rod 5 is hollow, a press rod 7 penetrates through the guide rod 5, the lower end of the press rod 7 extends into the positioning sleeve 6, the upper end of the press rod 7 penetrates out of the guide rod 5, and a spring 8 for pushing the press rod 7 upwards is arranged between the upper end of the press rod 7 and the upper end of the guide rod 5. A limiting block 9 is fixed above the annular cam 3 on the frame 1, a circular ring plate 19 is arranged on the outer peripheral wall of the annular cam 3, two support columns 20 are arranged on the upper end face of the circular ring plate 19, support blocks 21 are respectively fixed on the two support columns 20, and the limiting block 9 is fixed with the two support blocks 21. In this embodiment, a connecting seat 13 is fixed at the upper end of the pressing rod 7, a rotatable rolling bearing 14 is arranged at the side of the connecting seat 13, and the rolling bearing 14 can roll along the lower end surface of the limiting block 9 when the rotating disc 2 rotates. The lower end face of the limiting block 9 is provided with a boss 9a corresponding to the highest position of the upper end face of the annular cam 3, a guide face is connected between the lower end face of the limiting block 9 and the lower end face of the boss 9a, and the second rolling bearing 14 can roll to the lower end face of the boss 9a from the lower end face of the limiting block 9 through the guide face. The first spring 8 is sleeved outside the pressure lever 7, and two ends of the first spring 8 are respectively abutted against the connecting block 11 and the connecting seat 13.

Further, as shown in fig. 4, the pressure lever 7 includes a lever body 7a penetrating through the guide rod 5 and a connector 7b fixed to a lower end of the lever body 7a, a concave cavity 6b is formed in a lower end surface of the positioning sleeve 6, the connector 7b is located in the concave cavity 6b, an upper end surface of the connector 7b abuts against a top wall of the concave cavity 6b under the elastic force of the first spring 8, a lower end of the connector 7b is connected with an abutting head 15, and a one-way bearing 16 is arranged between the two. The lower end face of the connector 7b is provided with a mounting hole, the abutting head 15 is provided with a matching column 7a1 inserted into the mounting hole, and the one-way bearing 16 is arranged between the matching column 7a1 and the mounting hole. The positioning sleeve 6 is also provided with a straight hole with a lower port communicated with the concave cavity 6b, the lower end of the rod body 7a is provided with a matching column 7a1 extending into the positioning sleeve 6, and the upper end face of the connector 7b is provided with a connecting column 7b1 extending into the positioning sleeve 6 and in threaded connection with the lower end of the rod body 7 a.

As shown in figure 5, when the syringe is clamped into the circular arc notch 2a at the edge of the rotary table 2, the side part of the syringe lug seat is abutted against the side wall of the lug 6a to realize positioning, so that the syringe lug seat is positioned and cannot rotate under the action of friction force in the process that the rotary table 2 sends the syringe to the printing device, and the rolling bearing I12 always rolls along the lowest part of the upper end surface of the annular cam 3 in the process.

As shown in figure 6, when the rotary table 2 sends the syringe to the printing device, the rolling bearing-12 rolls from the lowest position of the upper end surface of the annular cam 3 to the highest position of the upper end surface of the annular cam 3, the guide rod 5 is lifted upwards through the height difference on the annular cam 3, and the lug 6a is separated from the syringe lug seat so that the syringe is in a rotatable state. While the guide rod 5 is lifted upwards, the rolling bearing II 14 rolls from the lower end face of the limiting block 9 to the lower end face of the boss 9a through the guide face, the pressure rod 7 is pushed downwards through the action of the height difference, and therefore the abutting head 15 abuts against the upper end face of the needle cylinder lug seat to prevent the needle cylinder from jumping upwards. Due to the action of the one-way bearing 16, the needle cylinder can rotate towards one direction while being pressed by the abutting head 15 to prevent upward jumping, so that the needle cylinder can be ensured to be smoothly matched with the action of the printing device to rotate so as to complete the printing of the scale marks. After printing is finished, the rolling bearing I12 rolls to the lowest position of the upper end face of the annular cam 3 again, and the rolling bearing II 14 rolls to the lower end face of the arc-shaped block again, so that the guide rod 5 slides downwards to reposition the needle cylinder, and the pressing rod 7 slides upwards to be separated from the needle cylinder.

Further, as shown in fig. 1-4, the number of the guide rods 5 is two, the two guide rods 5 both penetrate through the annular rotary table 4, the upper ends of the two guide rods 5 are both fixed with the connecting block 11, the lower ends of the two guide rods 5 are both fixed with the same connecting block 10, and the positioning sleeve 6 is fixed with the connecting block 10 located at the position of the guide rod 5 located at the outer side. The two guide rods 5 are connected by the connecting block 11 and the connecting block 10, so that the guide rods 5 and the annular rotary table 4 are circumferentially fixed, the guide rods 5 cannot rotate in the process of rotating along with the rotary table 2, namely, the guide rods 5 and the rotary table 2 are circumferentially fixed, the positioning sleeve 6 is fixed with the connecting block 10, the positioning sleeve 6 cannot rotate, and the positioning sleeve 6 and the rotary table 2 can be kept static to position a needle cylinder by using the lug 6 a. The pressure lever 7 is arranged in the guide rod 5 corresponding to the positioning sleeve 6 in a penetrating way, the connecting rod 17 is arranged in the other guide rod 5 in a penetrating way, and the upper end of the connecting rod 17 extends out of the corresponding guide rod 5 and is fixed with the connecting seat 13. The connecting rod 17 is sleeved with a second spring 18, and two ends of the second spring 18 respectively abut against the connecting seat 13 and the connecting block 11.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The bat printing machine for the scale marks of the syringe needle cylinder comprises a machine frame (1), a rotatable turntable (2), a printing device arranged on one side of the turntable (2), an annular cam (3) positioned above the turntable (2) and fixed with the machine frame (1), and an annular turntable (4) positioned on the inner side of the annular cam (3) and capable of rotating together with the turntable (2), wherein a guide rod (5) capable of sliding up and down under the drive of the upper end surface of the annular cam (3) is penetrated through the annular turntable (4), the highest position of the upper end surface of the annular cam (3) corresponds to the printing device, the bat printing machine is characterized in that the guide rod (5) is circumferentially fixed with the annular turntable (4), a positioning sleeve (6) is fixed at the lower end of the guide rod (5), a convex block (6a) capable of abutting against the side part of the needle cylinder ear base to position the needle cylinder is arranged on the lower end surface of the positioning sleeve (6), a press rod (7) with the lower end extending into the positioning sleeve (, the upper end of the pressure lever (7) penetrates out of the guide rod (5), a first spring (8) which pushes the pressure lever (7) upwards is arranged between the upper end of the pressure lever and the guide rod, a limiting block (9) is fixed above the annular cam (3) on the rack (1), and the upper end of the pressure lever (7) is abutted against the lower end face of the limiting block (9) when the guide rod (5) slides upwards.

2. The pad printing machine for the scale marks of the syringe needle cylinder according to claim 1, wherein the number of the guide rods (5) is two, the two guide rods (5) penetrate through the annular rotary table (4), the lower ends of the two guide rods (5) are fixed on a connecting block (10), the positioning sleeve (6) is fixed with the connecting block (10) at the position of one guide rod (5), and the pressure rod (7) penetrates through the guide rods (5).

3. The pad printing machine for the scale marks on the syringe needle cylinder as claimed in claim 2, wherein the upper ends of the two guide rods (5) are fixed with a connecting block (11), a rolling bearing I (12) is connected with the side part of the connecting block (11), and the peripheral wall of the rolling bearing I (12) abuts against the upper end surface of the annular cam (3).

4. The pad printing machine for the scale marks of the syringe needle cylinder according to claim 3, wherein a boss (9a) corresponding to the highest position of the upper end surface of the annular cam (3) is arranged on the lower end surface of the limiting block (9), and a guide surface which can enable the upper end of the pressure rod (7) to move from the lower end surface of the limiting block (9) to the lower end surface of the boss (9a) is connected between the lower end surface of the boss (9a) and the lower end surface of the limiting block (9).

5. The pad printing machine for the scale marks of the syringe needle cylinder according to claim 4, wherein a connecting seat (13) is fixed at the upper end of the pressure lever (7), a rotatable rolling bearing II (14) is arranged on the side part of the connecting seat (13), the rolling bearing II (14) can roll along the lower end surface of the limiting block (9) when the rotating disc (2) rotates, the spring I (8) is sleeved outside the pressure lever (7), and two ends of the spring I (8) are respectively abutted against the connecting block (11) and the connecting seat (13).

6. The pad printing machine for the scale marks of the syringe needle cylinder according to claim 5, wherein the pressure lever (7) comprises a rod body (7a) arranged in the guide rod (5) in a penetrating manner and a connector (7b) fixed at the lower end of the rod body (7a), a concave cavity (6b) is formed in the lower end face of the positioning sleeve (6), the connector (7b) is positioned in the concave cavity (6b), the upper end face of the connector (7b) abuts against the top wall of the concave cavity (6b) under the action of the elastic force of the first spring (8), the lower end of the connector (7b) is connected with an abutting head (15), and a one-way bearing (16) is arranged between the abutting head and the.

7. The pad printing machine for the scale marks on the syringe needle cylinder according to claim 6, wherein the lower end surface of the connector (7b) is provided with a mounting hole, the abutting head (15) is provided with a convex column (15a) inserted into the mounting hole, and the one-way bearing (16) is arranged between the convex column (15a) and the mounting hole.

8. The pad printing machine for the scale marks of the syringe needle cylinder as claimed in claim 6, wherein a straight hole with a lower port communicated with the concave cavity (6b) is arranged in the positioning sleeve (6), a connecting column (7b1) extending into the straight hole is arranged on the upper end surface of the connecting head (7b), and a matching column (7a1) in threaded connection with the connecting column (7b1) is arranged on the lower end surface of the rod body (7 a).

9. The bat printing machine for the scale marks of the syringe needle cylinder according to the claim 5, 6, 7 or 8, characterized in that a connecting rod (17) penetrates through the other guide rod (5), the upper end of the connecting rod (17) extends out of the guide rod (5) and is fixed with the connecting seat (13), a second spring (18) is sleeved on the connecting rod (17), and two ends of the second spring (18) are respectively abutted against the connecting seat (13) and the connecting block (11).