Tattooing pen capable of conveniently adjusting needle withdrawing length of tattooing needle

Abstract

The utility model discloses a tattooing pen capable of conveniently adjusting the needle withdrawing length of a tattooing needle, which comprises a mounting block connected with an eccentric wheel ejector pin driving mechanism. The device is characterized in that the mounting block is sleeved with a lower sleeve shell, a connecting sleeve shell and an upper sleeve shell which are sequentially distributed from bottom to top; a clamping hole used for being connected with the tattoo pen point is formed in the bottom end of the lower sleeve shell, the top of the lower sleeve shell is clamped to the bottom of the connecting sleeve shell, a vertical guide hole is formed in one side of the bottom of the connecting sleeve shell, and a screw connected to the mounting block is arranged in the guide hole; an adjusting block is rotationally connected into the connecting sleeve shell, and a threaded connecting hole in threaded connection with the top of the mounting block is formed in the middle of the adjusting block. The top end of the upper sleeve shell is in threaded connection with a power module. The needle withdrawing length of the tattooing needle can be adjusted, and the tattooing needle has the advantages of being high in operation stability, low in noise during working, convenient to disassemble, assemble and maintain, high in structural stability and convenient to adjust and operate.

Description

Technical Field

[0001] The utility model relates to the field of tattoo pens, in particular to a tattoo pen which is convenient for adjusting the tattoo needle extension length. Background Art

[0002] Tattooing is a technique that leaves a permanent pattern or text on the skin by inserting a pigment needle into the skin. Traditional tattooing requires the tattoo artist to hold the tattoo needle for acupuncture, which is troublesome to operate. With the development of technology, existing tattooing operations generally use a tattoo pen similar to that disclosed in ZL201920574682.5. After the eccentric wheel is driven to rotate by the internal motor, the ejector rod connected to the outside of the eccentric wheel by the bearing can reciprocate, thereby driving the tattoo needle to extend. However, in this type of tattoo pen, after the upper and lower shells of the tattoo pen are threadedly connected, the length of the ejector rod in the tattoo pen shell is fixed, and the tattoo needle outlet length clamped at the end of the tattoo pen is fixed, and cannot be adjusted according to the actual needs of the tattoo artist.

[0003] Therefore, the existing eccentric wheel driven tattoo pen has the problem that the tattoo needle extension length cannot be adjusted. Utility Model Content

[0004] The utility model aims to provide a tattoo pen which can conveniently adjust the tattoo needle extension length. The utility model has the advantage of being able to adjust the tattoo needle extension length.

[0005] The technical solution of the utility model is as follows: a tattoo pen which is convenient for adjusting the needle extension length of a tattoo needle, comprises a mounting block, and an eccentric wheel ejector drive mechanism is connected to the mounting block; the mounting block is provided with a lower housing, a connecting housing and an upper housing which are sequentially distributed from bottom to top; the bottom end of the lower housing is provided with a clamping hole for connecting a tattoo pen head, the top of the lower housing is clamped on the bottom of the connecting housing, a vertical guide hole is provided on one side of the bottom of the connecting housing, and a screw connected to the mounting block is provided in the guide hole; an adjusting block is rotatably connected in the connecting housing, and a threaded connecting hole which is threadedly connected to the top of the mounting block is provided in the middle of the adjusting block; the top of the adjusting block is connected to the bottom of the upper housing, and the top of the upper housing is threadedly connected to a power module.

[0006] In the aforementioned tattoo pen that is convenient for adjusting the needle extension length of the tattoo needle, the eccentric wheel ejector drive mechanism includes a motor horizontally fixed in the middle of the mounting block, an eccentric wheel is connected to the driving shaft of the motor, a collar is connected to the outside of the eccentric wheel through a bearing sleeve, a rocker rod is provided at the bottom of the collar, and a driving column for driving the ejector is connected to the rocker rod through a connecting rod; a vertical slide groove is provided on the mounting block corresponding to the connecting rod position, and a sliding cavity that slides with the driving column is provided on the inner side of the bottom of the mounting block.

[0007] In the aforementioned tattoo pen that is convenient for adjusting the tattoo needle extension length, a counterweight block is connected to the side of the eccentric wheel corresponding to the side to which the motor drive shaft is eccentrically connected.

[0008] In the aforementioned tattoo pen that is convenient for adjusting the needle extension length of the tattoo needle, a plurality of horizontal convex strips evenly distributed in an annular manner are provided on the side edge of the bottom end of the connecting shell; an L-shaped slot that cooperates with the horizontal convex strip is provided on the inner side surface of the top of the lower shell; a horizontal No. 1 ball head plunger is connected to the position corresponding to the top of each horizontal convex strip in the connecting shell; a slot is provided on the inner side surface of the top of the lower shell at a position corresponding to the position above the horizontal section of the L-shaped slot; when the horizontal convex strip is engaged and snapped into the horizontal section of the L-shaped slot, the No. 1 ball head plunger is engaged and snapped into the slot.

[0009] In the aforementioned tattoo pen that is convenient for adjusting the tattoo needle extension length, a dot mark and a vertical bar mark are provided at the top of the outer side surface of the lower shell, the dot mark is located on the vertical center line of one of the horizontal sections of the L-shaped slot, and the vertical bar mark is located on the vertical center line of the vertical section of the L-shaped slot; an indicator mark is provided on the side surface of the connecting shell corresponding to the top of the lower shell, and the indicator mark is located on the vertical center line of the horizontal convex strip on the front side of the eccentric wheel ejector drive mechanism.

[0010] In the aforementioned tattoo pen that is convenient for adjusting the tattoo needle extension length, an annular sliding groove is provided in the connecting sleeve shell; an annular ball groove is provided on the outer surface of the adjustment block at a position corresponding to the sliding groove, a ball retainer is provided between the ball groove and the sliding groove, and a plurality of evenly distributed balls are provided on the ball retainer, and the two sides of the balls are respectively slidably fitted in the ball groove and the sliding groove.

[0011] In the aforementioned tattoo pen that is convenient for adjusting the tattoo needle extension length, a plurality of annular evenly distributed No. 1 positioning grooves are provided on the bottom surface of the adjustment block; a plurality of annular evenly distributed No. 2 ball head plungers are connected to the connecting sleeve, the No. 2 ball head plungers are arranged vertically, and the top end of the No. 2 ball head plungers is matched and arranged in the No. 1 positioning groove.

[0012] In the aforementioned tattoo pen that is convenient for adjusting the tattoo needle extension length, a lower magnetic ring is embedded on the bottom surface of the adjustment block, a connecting block threadedly connected to the upper shell is provided on the top outer cover of the adjustment block, and an upper magnetic ring facing the lower magnetic ring and magnetically attracted to the lower magnetic ring is provided in the connecting block.

[0013] In the aforementioned tattoo pen that is convenient for adjusting the tattoo needle extension length, the top of the adjustment block is threadedly connected to a rotating block that is matched and arranged in the upper shell, and the side wall of the rotating block is connected to a plurality of annularly evenly distributed No. 3 ball head plungers, and the No. 3 ball head plungers are arranged horizontally; a No. 2 positioning groove is matched at the position corresponding to each No. 3 ball head plunger on the inner side wall of the upper shell; the stability of the No. 3 ball head plunger when matched with the No. 2 positioning groove is higher than the stability of the No. 2 ball head plunger when matched with the No. 1 positioning groove.

[0014] Compared with the prior art, the utility model connects the eccentric wheel ejector pin driving mechanism to the mounting block, and the screws connected to the side of the mounting block are slidably arranged in the vertical guide hole on one side of the connecting shell; the top of the mounting block is threadedly connected to the threaded connection hole of the adjusting block, the top of the adjusting block is connected to the upper shell, and the top of the upper shell is threadedly connected with a power module; the outer side of the adjusting block is rotatably connected to the connecting shell, and the bottom of the connecting shell is clamped with a lower shell sleeved outside the mounting block; only the upper shell is rotated relative to the connecting shell, and the upper shell can drive the mounting block to rotate through the adjusting block, and the screws on one side of the mounting block are slidably arranged in the vertical guide hole on one side of the connecting shell, so that the mounting block can only slide up and down relative to the vertical guide hole; when the mounting block slides up and down relative to the lower shell, the relative distance between the eccentric wheel ejector pin driving mechanism connected to the mounting block and the tattoo pen head clamped on the lower shell can change, so that the needle-out length of the tattoo needle in the tattoo pen head driven by the eccentric wheel driving mechanism changes.

[0015] In addition, in the eccentric wheel driving mechanism of the utility model, when the motor drives the eccentric wheel to rotate, the eccentric wheel can drive the ring and the rocker arm to swing through the bearing, and the rocker arm can synchronously drive the driving column to reciprocate up and down through the connecting rod; the vertical sliding groove on the mounting block slides in cooperation with the connecting rod, and the sliding cavity at the bottom of the mounting block slides in cooperation with the driving column, and the operating stability is relatively high.

[0016] A counterweight is connected to one side of the eccentric wheel corresponding to the eccentric connection with the motor drive shaft, which balances the uneven mass distribution of the eccentric wheel on the outer side of the motor drive shaft, improves the running stability, reduces vibration and reduces noise.

[0017] The plurality of horizontal convex strips evenly distributed at annular intervals on the side edge of the bottom end of the connecting sleeve can slide down from the vertical section of the L-shaped slot on the inner side surface of the top of the lower sleeve and snap into the horizontal section, which is convenient for disassembly and assembly; when the connecting sleeve is snapped into the horizontal section of the L-shaped slot, the No. 1 ball head plunger corresponding to each horizontal convex strip above the connecting sleeve can snap into the slot, which improves the smoothness during snapping and improves the stability between the connecting sleeve and the lower sleeve during snapping; the dot marks and vertical bar marks on the outer side of the lower sleeve cooperate with the indicator marks on the connecting sleeve, which can facilitate the user to observe and understand the snapping state between the lower sleeve and the connecting sleeve, and can facilitate the user to clearly understand the direction of the internal eccentric wheel ejector pin drive mechanism. When the user sets the eccentric wheel ejector pin drive mechanism upward, the mechanism has higher operating stability and less vibration and noise.

[0018] The connecting sleeve and the adjusting block are slidably connected through sliding grooves, balls and ball grooves. A ball retainer is provided between the sliding grooves and the ball grooves to separate the balls evenly. The connecting sleeve and the adjusting block rotate relatively smoothly, and the two are not easy to disengage, and the structural stability is high.

[0019] When the adjusting block rotates relative to the connecting sleeve, a plurality of vertical No. 2 ball head plungers on the connecting sleeve roll between a plurality of annularly evenly distributed No. 1 positioning grooves, which can achieve a certain angle adjustment and positioning effect.

[0020] The upper housing and the adjusting block are connected by the magnetic attraction between the upper magnetic ring and the lower magnetic ring, which is convenient for disassembly, assembly and maintenance.

[0021] The rotating block threadedly connected to the top of the adjusting block is provided with a plurality of No. 3 ball head plungers evenly distributed in annular shapes on its side wall, and a No. 2 positioning groove is provided at a position corresponding to each No. 3 ball head plunger in the upper shell, and the stability of the No. 3 ball head plunger when cooperating with the No. 2 positioning groove is higher than the stability of the No. 2 ball head plunger when cooperating with the No. 1 positioning groove; in the process of driving the adjusting block to rotate relative to the connecting shell by the upper shell, when the mounting block can move up and down relative to the connecting shell, the upper shell can drive the adjusting block to rotate synchronously through the rotating block; and when the mounting block reaches the upper and lower limit positions, the upper shell can rotate relative to the rotating block to achieve idling, thereby avoiding excessive force damage to the guide hole and the screw part caused by excessive rotation of the upper shell, and the adjustment operation is more convenient.

[0022] Therefore, the utility model can not only adjust the tattoo needle exit length, but also has the advantages of high running stability, low noise during operation, convenient disassembly and maintenance, high structural stability and convenient adjustment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 1 is a schematic diagram of the structure of the lower casing;

[0025] Figure 3 It is a schematic diagram of the structure of the utility model when the lower casing is removed;

[0026] Figure 4 It is a schematic diagram of the structure of the eccentric wheel ejector drive mechanism on the mounting block;

[0027] Figure 5 It is a schematic diagram of the structure of the installation block;

[0028] Figure 6 It is a structural schematic diagram of the connection housing;

[0029] Figure 7 It is a structural schematic diagram of the upper shell;

[0030] Figure 8 It is a structural schematic diagram of the adjusting block and the rotating block;

[0031] Fig. 9 It is a structural schematic diagram of the adjusting block, the rotating block and the connecting block;

[0032] Fig.10 It is a structural diagram of the adjustment block.

[0033] The markings in the attached drawings are: 1-mounting block, 3-lower casing, 4-connecting casing, 5-upper casing, 6-clip hole, 7-guide hole, 8-screw, 9-adjusting block, 11-power module, 13-eccentric wheel, 14-bearing, 15-ring, 16-rocker, 17-connecting rod, 18-driving column, 19-slide groove, 20-sliding cavity, 21-counterweight block, 22-horizontal ridge, 23-L-type card Slot, 24-No. 1 ball plunger, 25-card slot, 26-dot mark, 27-vertical bar mark, 28-indicator mark, 29-sliding slot, 30-ball slot, 31-ball retainer, 32-ball, 33-No. 1 positioning slot, 34-No. 2 ball plunger, 35-lower magnetic ring, 36-connecting block, 37-upper magnetic ring, 38-rotating block, 39-No. 3 ball plunger, 40-No. 2 positioning slot. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0035] Embodiment. A tattoo pen that can conveniently adjust the length of the tattoo needle, comprising: Figures 1 to 10As shown, it includes a mounting block 1, to which an eccentric wheel ejector drive mechanism is connected; the outer cover of the mounting block 1 is provided with a lower shell 3, a connecting shell 4 and an upper shell 5 which are distributed in sequence from bottom to top; the bottom end of the lower shell 3 is provided with a clamping hole 6 for connecting a tattoo pen head, the top of the lower shell 3 is clamped on the bottom of the connecting shell 4, one side of the bottom of the connecting shell 4 is provided with a vertical guide hole 7, and a screw 8 connected to the mounting block 1 is provided in the guide hole 7; an adjusting block 9 is rotatably connected in the connecting shell 4, and a threaded connecting hole threadedly connected to the top of the mounting block 1 is provided in the middle of the adjusting block 9; the top of the adjusting block 9 is connected to the bottom of the upper shell 5, and the top of the upper shell 5 is threadedly connected to a power module 11.

[0036] The eccentric wheel ejector drive mechanism includes a motor horizontally fixed in the middle of the mounting block 1, an eccentric wheel 13 is connected to the driving shaft of the motor, a collar 15 is sleeved on the outside of the eccentric wheel 13 through a bearing 14, a rocker 16 is provided at the bottom of the collar 15, and a driving column 18 for driving the ejector is connected to the rocker 16 through a connecting rod 17; a vertical slide groove 19 is provided at the corresponding connecting rod 17 on the mounting block 1, and a sliding cavity 20 is provided on the inner side of the bottom of the mounting block 1 to slide with the driving column 18; a counterweight 21 is connected to the side of the eccentric wheel 13 corresponding to the eccentric connection of the motor driving shaft; a plurality of horizontal convex strips 22 evenly spaced in annular patterns are provided on the side of the bottom end of the connecting shell 4; a horizontal convex strip 22 is provided on the inner side of the top of the lower shell 3 to match the horizontal convex strip 22 The connecting shell 4 is provided with a horizontal No. 1 ball plunger 24 at a position corresponding to the position above each horizontal ridge 22; a slot 25 is provided on the inner side surface of the top of the lower shell 3 at a position corresponding to the position above the horizontal section of the L-shaped slot 23; when the horizontal ridge 22 fits into the horizontal section of the L-shaped slot 23, the No. 1 ball plunger 24 fits into the slot 25; a dot mark 26 and a vertical bar mark 27 are provided at the top of the outer side surface of the lower shell 3, the dot mark 26 is located on the vertical center line of the horizontal section of one of the L-shaped slots 23, and the vertical bar mark 27 is located on the vertical center line of the vertical section of the L-shaped slot 23; an indicator mark 28 is provided on the side surface of the connecting shell 4 corresponding to the top of the lower shell 3, and the indicator mark 28 is located at On the vertical center line of the horizontal convex strip 22 on the front side of the eccentric wheel ejector drive mechanism; an annular sliding groove 29 is provided in the connecting sleeve 4; an annular ball groove 30 is provided at the position corresponding to the sliding groove 29 on the outer side of the adjusting block 9, and a ball retainer 31 is provided between the ball groove 30 and the sliding groove 29, and a plurality of evenly distributed balls 32 are provided on the ball retainer 31, and the two sides of the balls 32 are respectively slidably matched in the ball groove 30 and the sliding groove 29; a plurality of evenly distributed annular No. 1 positioning grooves 33 are provided on the bottom surface of the adjusting block 9; a plurality of evenly distributed annular No. 2 ball head plungers 34 are connected in the connecting sleeve 4, and the No. 2 ball head plungers 34 are vertically arranged, and the top of the No. 2 ball head plungers 34 are matched and arranged on the No. 1 In the positioning groove 33; a lower magnetic ring 35 is embedded on the bottom surface of the adjusting block 9, and a connecting block 36 threadedly connected to the upper shell 5 is provided on the top of the adjusting block 9, and an upper magnetic ring 37 facing the lower magnetic ring 35 and magnetically attracted is provided in the connecting block 36; the top of the adjusting block 9 is threadedly connected to a rotating block 38 arranged in the upper shell 5, and a plurality of annularly evenly distributed No. 3 ball head plungers 39 are connected to the side wall of the rotating block 38, and the No. 3 ball head plungers 39 are arranged horizontally; a No. 2 positioning groove 40 is provided at the position corresponding to each No. 3 ball head plunger 39 on the inner side wall of the upper shell 5; the stability of the No. 3 ball head plunger 39 when cooperating with the No. 2 positioning groove 40 is higher than the stability of the No. 2 ball head plunger 34 when cooperating with the No. 1 positioning groove 33.

[0037] Working principle: when it is needed, the tattoo pen head only needs to be clamped into the clamping hole 6 at the bottom of the lower housing 3, so that the top of the tattoo needle push rod on the tattoo pen head is located in the sliding cavity 20; since a battery is arranged in the power module 11, the power supply of the battery to the motor can be controlled by the switch on the power module 11; then, the motor can drive the eccentric wheel 13 to rotate, so that the sleeve ring 15 and the swing rod 16 connected by the bearing 14 outside the eccentric wheel 13 swing, and the connecting rod 17 at the bottom end of the swing rod 16 can move up and down along the vertical slide groove 19, and drive the driving column 18 connected to the bottom end of the connecting rod 17 to extend up and down in the sliding cavity 20; when the driving column 18 extends downward, it can push the tattoo needle push rod in the sliding cavity 20 downward, so that the tattoo needle extends out of the tattoo pen head, and when the driving column 18 slides upward along the sliding cavity 20, the reset mechanism in the tattoo pen head can drive the tattoo needle to reset upward again, thereby realizing the reciprocating acupuncture tattoo operation of the tattoo needle.

[0038] When it is necessary to adjust the tattoo needle extension length, it is only necessary to rotate the power module 11, and the power module 11 can drive the upper shell 5 to rotate relative to the connecting shell 4; because the multiple No. 2 positioning grooves 40 on the inner side of the upper shell 5 cooperate with the multiple No. 3 ball head plungers 39 on the side of the rotating block 38, and the cooperation stability between the two is higher than the cooperation stability between the No. 2 ball head plunger 34 on the connecting shell 4 and the No. 1 positioning groove 33 on the bottom surface of the adjusting block 9, when the upper shell 5 rotates relative to the connecting shell 4, the upper shell 5 can drive the adjusting block 9 relative to the connecting shell 4 through the rotating block 38. The housing 4 rotates; and since the adjusting block 9 is threadedly connected to the top of the mounting block 1 through the threaded connection hole in the middle, but the screw 8 connected to the side of the mounting block 1 is arranged in the vertical guide hole 7 on the side of the connecting housing 4, the mounting block 1 will not rotate synchronously with the adjusting block 9, but will move up and down; when the mounting block 1 moves up and down, the relative distance between the sliding cavity 20 and the tattoo needle push rod will change, and the distance that the driving column 18 pushes the tattoo needle push rod downward when it reciprocates in the sliding cavity 20 will change, thereby adjusting the needle length of the tattoo needle. When the screw 8 reaches the upper and lower ends of the guide hole 7, the upper housing 5 continues to rotate, and the adjusting block 9 cannot continue to rotate. At this time, the rotation force applied to the upper housing 5 can force the end of the No. 3 ball head plunger 39 to retract, so that the upper housing 5 can rotate relative to the rotating block 38, realize idling, and avoid excessive rotation force on the upper housing 5 to damage internal parts.

[0039] When it is necessary to maintain and lubricate the bearing 14, the slide groove 19 and the sliding cavity 20, it is only necessary to rotate the connecting shell 4 relative to the lower shell 3, and the multiple horizontal ridges 22 at the bottom of the connecting shell 4 can slide out from the corresponding horizontal section of the L-shaped slot 23 to the vertical section, and the ball at the end of the No. 1 ball plunger 24 above the horizontal ridge 22 can slide out from the corresponding slot 25 to the vertical section of the L-shaped slot 23, and then pull the lower shell 3 downward to separate the lower shell 3 and the connecting shell 4, and then the user can perform maintenance and lubrication operations. The dot mark 26 and the vertical bar mark 27 on the outer surface of the lower shell 3 cooperate with the indicator mark 28 on the connecting shell 4, which can facilitate the user to observe and understand the clamping state between the lower shell 3 and the connecting shell 4, and can facilitate the user to clearly know the direction of the internal eccentric wheel ejector drive mechanism; when using, the user can more conveniently set the eccentric wheel ejector drive mechanism upward, so that the eccentric wheel ejector drive mechanism has higher operating stability and less vibration and noise.

[0040] A counterweight 21 is connected to one side of the eccentric wheel 13 corresponding to the motor drive shaft eccentrically connected thereto, thereby balancing the uneven mass distribution of the eccentric wheel 13 outside the motor drive shaft, improving operational stability, reducing vibration and lowering noise.

[0041] The connecting sleeve 4 and the adjusting block 9 are connected by sliding grooves 29, balls 32 and ball grooves 30. A ball retainer 31 is provided between the sliding grooves 29 and the ball grooves 30 to evenly space the balls 32. The connecting sleeve 4 and the adjusting block 9 rotate relatively smoothly, and the two are not easy to be separated, and the structural stability is high. The upper sleeve 5 and the adjusting block 9 are connected by the magnetic attraction between the upper magnetic ring 37 and the lower magnetic ring 35, which is convenient for disassembly and maintenance.

Claims

1. A tattoo pen that can conveniently adjust the tattoo needle extension length, comprising a mounting block (1), to which an eccentric wheel ejector drive mechanism is connected; characterized in that: The outer cover of the mounting block (1) is provided with a lower housing (3), a connecting housing (4) and an upper housing (5) which are sequentially arranged from bottom to top; the bottom end of the lower housing (3) is provided with a clamping hole (6) for connecting a tattoo pen head; the top of the lower housing (3) is clamped on the bottom of the connecting housing (4); a vertical guide hole (7) is provided on one side of the bottom of the connecting housing (4); a screw (8) connected to the mounting block (1) is provided in the guide hole (7); an adjusting block (9) is rotatably connected in the connecting housing (4); a threaded connection hole which is threadedly connected to the top of the mounting block (1) is provided in the middle of the adjusting block (9); the top of the adjusting block (9) is connected to the bottom of the upper housing (5); the top of the upper housing (5) is threadedly connected to a power module (11).

2. A tattoo pen that can conveniently adjust the tattoo needle's needle length according to claim 1, characterized in that: The eccentric wheel ejector drive mechanism comprises a motor horizontally fixed in the middle of a mounting block (1); an eccentric wheel (13) is connected to the driving shaft of the motor; a collar (15) is sleeved on the outside of the eccentric wheel (13) via a bearing (14); a rocker (16) is provided at the bottom of the collar (15); a driving column (18) for driving the ejector is connected to the rocker (16) via a connecting rod (17); a vertical slide groove (19) is provided at a position corresponding to the connecting rod (17) on the mounting block (1); and a sliding cavity (20) is provided on the inner side of the bottom of the mounting block (1) for slidingly cooperating with the driving column (18).

3. A tattoo pen that can conveniently adjust the tattoo needle length according to claim 2, characterized in that: A counterweight block (21) is connected to the side of the eccentric wheel (13) corresponding to the side eccentrically connected to the motor drive shaft.

4. A tattoo pen that can conveniently adjust the tattoo needle's length according to claim 1, characterized in that: The bottom side of the connecting shell (4) is provided with a plurality of horizontal convex strips (22) evenly distributed at annular intervals; the top inner side surface of the lower shell (3) is provided with an L-shaped slot (23) matched with the horizontal convex strip (22); a horizontal No. 1 ball plunger (24) is connected to a position corresponding to the top of each horizontal convex strip (22) in the connecting shell (4); a slot (25) is provided on the top inner side surface of the lower shell (3) at a position corresponding to the top of the horizontal section of the L-shaped slot (23); when the horizontal convex strip (22) is matched and snapped into the horizontal section of the L-shaped slot (23), the No. 1 ball plunger (24) is matched and snapped into the slot (25).

5. A tattoo pen that can conveniently adjust the tattoo needle's length according to claim 4, characterized in that: A dot mark (26) and a vertical bar mark (27) are provided at the top of the outer side surface of the lower casing (3), the dot mark (26) is located on the vertical center line of the horizontal section of one of the L-shaped slots (23), and the vertical bar mark (27) is located on the vertical center line of the vertical section of the L-shaped slot (23); an indication mark (28) is provided on the side surface of the connecting casing (4) corresponding to the top of the lower casing (3), and the indication mark (28) is located on the vertical center line of the horizontal convex strip (22) on the front side of the eccentric wheel ejector drive mechanism.

6. A tattoo pen that can conveniently adjust the tattoo needle's length according to claim 1, characterized in that: An annular sliding groove (29) is provided in the connecting sleeve (4); an annular ball groove (30) is provided on the outer surface of the adjusting block (9) at a position corresponding to the sliding groove (29); a ball retainer (31) is provided between the ball groove (30) and the sliding groove (29); a plurality of evenly annularly distributed balls (32) are provided on the ball retainer (31); and two sides of the balls (32) are respectively slidably fitted in the ball groove (30) and the sliding groove (29).

7. A tattoo pen that can conveniently adjust the tattoo needle's length according to claim 6, characterized in that: The bottom surface of the regulating block (9) is provided with a plurality of evenly distributed annular No. 1 positioning grooves (33); the connecting sleeve (4) is connected with a plurality of evenly distributed annular No. 2 ball head plungers (34); the No. 2 ball head plungers (34) are arranged vertically, and the top end of the No. 2 ball head plungers (34) is arranged in the No. 1 positioning groove (33).

8. A tattoo pen that can conveniently adjust the tattoo needle's length according to claim 6, characterized in that: A lower magnetic ring (35) is embedded on the bottom surface of the adjustment block (9), and a connecting block (36) threadedly connected to the upper casing (5) is provided on the top outer cover of the adjustment block (9), and an upper magnetic ring (37) facing the lower magnetic ring (35) and magnetically attracted to the upper magnetic ring (37) is provided in the connecting block (36).

9. A tattoo pen that can conveniently adjust the tattoo needle's length according to claim 7, characterized in that: The top end of the adjusting block (9) is threadedly connected to a rotating block (38) arranged in cooperation with the upper casing (5); a plurality of annularly evenly distributed No. 3 ball plungers (39) are connected to the side wall of the rotating block (38); the No. 3 ball plungers (39) are arranged horizontally; a No. 2 positioning groove (40) is arranged in cooperation with the position of each No. 3 ball plunger (39) on the inner side wall of the upper casing (5); the stability of the No. 3 ball plunger (39) when it cooperates with the No. 2 positioning groove (40) is higher than the stability of the No. 2 ball plunger (34) when it cooperates with the No. 1 positioning groove (33).

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