Double-headed eyebrow pencil with rear-press anti-touch switch

Through the rear-press anti-accidental-touch switch design and the cooperation of the ratchet and ratchet rod, the problems of inconvenient operation and accidental touch of the double-headed eyebrow pencil are solved, and the effects of stable discharging and anti-accidental touch are achieved.

CN114468517BActive Publication Date: 2025-09-26SHYA HSIN PACKAGING INDUSTRY (CHINA) CO LTD
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Patent Information

Application Number
CN202111495530.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-12-08
Publication Date
2025-09-26
Estimated Expiration
2041-12-08

AI Technical Summary

Technical Problem

Existing double-headed eyebrow pencils are inconvenient to operate and lack an anti-accidental-touch design, which causes users to accidentally touch the pencil when not in use, causing the material to flow out and cause waste.

Method used

It adopts a rear-press anti-accidental touch switch design, and achieves stable material discharge through the cooperation of the ratchet and ratchet rod, and prevents accidental touch through a locking device. It includes a combined structure of a pen head, front cover, piston, screw, ratchet, ratchet seat, ratchet rod, brush seat, bristles, inner sleeve and button.

Benefits of technology

It has achieved easy operation, stable material discharging, and has an anti-accidental touch function to prevent material from flowing out and avoid waste.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses a double-headed eyebrow pencil with a rear-pressed anti-accidental-touch switch, comprising: a pen tip, a front cover, a piston, a middle ring, a pen body, a screw, a nut, a first spring, a ratchet, a ratchet seat, a ratchet rod, a shoulder sleeve, a bristle holder, bristles, an inner sleeve, a tail cover, and a button. The middle ring is a hollow rod-shaped sleeve mounted on the hollow pen body. The screw is provided with threads and is rotatably mounted on the nut. One end of the piston abuts against the material body and the other end abuts against the screw. The piston can move toward an outlet under the push of the screw. The end of the ratchet near the ratchet rod is provided with a first unidirectional jump tooth. The end of the ratchet rod near the ratchet wheel is provided with ratchet teeth. The ratchet rod, ratchet, bristle holder, and inner sleeve can move axially toward the material body under the push of the button and reset by the elastic force of the first spring. The bristle holder and shoulder sleeve are provided with a locking device. When the locking device is in the locked state, the bristle holder and shoulder sleeve are axially fixed. The present invention is simple to operate, has stable material discharging, and has an anti-accidental-touch function.
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Description

Technical Field

[0001] The invention relates to an eyebrow pencil, in particular to a double-headed eyebrow pencil with a rear-pressing anti-mistouch switch. Background Art

[0002] Currently, conventional double-ended eyebrow pencils generally have fixed bristles on one end and a rotating pen head on the other end for discharging material. This is very inconvenient to operate and requires both hands to operate. Currently, conventional products also lack anti-accidental touch design. When users put the double-ended eyebrow pencil in their bag when not in use, it is easy to accidentally touch it, causing the material to flow out, resulting in waste. Summary of the Invention

[0003] In order to overcome the above defects, the present invention provides a double-headed eyebrow pencil with a rear-press anti-accidental-touch switch, which has the advantages of easy operation, stable discharge and anti-accidental-touch function.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a rear-pressing anti-mistouch switch double-head eyebrow pencil, including: a pen tip, a front cover, a piston, a middle ring, a pen body, a screw, a nut, a first spring, a ratchet, a ratchet seat, a ratchet rod, a shoulder cover, a brush holder, bristles, an inner cover, a tail cover and a button, the middle ring is a hollow rod-shaped sleeve arranged on the hollow pen body, the pen tip is a hollow structure arranged at one end of the pen body, the material body is arranged inside the pen tip near the outlet, the front cover is detachably arranged at one end of the pen body near the pen tip, and the front cover can cover the pen tip The nut is arranged in the pen body, and a thread is arranged on the inside of the nut. The screw is provided with a thread and is rotatably arranged on the nut. One end of the piston abuts against the material body and the other end abuts against the screw. The piston can move toward the outlet under the push of the screw, and the material body can move out of the outlet under the push of the piston. The ratchet and the first spring are sleeved on the screw, and the two ends of the first spring abut against the nut and the ratchet respectively. The ratchet is slidably arranged on the screw and is circumferentially fixed to the screw. The ratchet rod is a hollow rod. One end of the screw is inserted into the ratchet rod, and the screw can move and rotate axially in the ratchet rod. The ratchet seat is hollow and annular and is arranged in the pen body. One end of the ratchet rod is inserted into the ratchet seat. The end of the ratchet wheel close to the ratchet rod is provided with a first one-way jumping tooth. The end of the ratchet rod close to the ratchet wheel is provided with a ratchet. The inside of the end of the ratchet seat close to the ratchet wheel is provided with a second one-way jumping tooth. The ratchet wheel can rotate under the push of the ratchet rod, and the first one-way jumping tooth can be stuck in the second one-way jumping tooth. The shoulder sleeve is arranged at the end of the pen body away from the pen head, and the end of the ratchet rod away from the ratchet teeth passes through the shoulder sleeve. The brush seat sleeve is arranged at the end of the ratchet rod away from the ratchet teeth. The brush seat and The ratchet rod is fixed circumferentially, the bristles are arranged on the bristle seat, the tail cover is detachably arranged at one end of the pen body close to the bristle seat, the tail cover can cover the bristles, and a button is provided at the end of the tail cover. An inner sleeve is slidingly provided inside the tail cover, one end of the inner sleeve is against the bristle seat and the other end is connected to the button. The ratchet rod, ratchet, bristle seat and inner sleeve can move axially toward the material body under the push of the button and be reset by the elastic force of the first spring. The bristle seat and the shoulder sleeve are provided with a locking device. When the locking device is in the locked state, the bristle seat and the shoulder sleeve are axially fixed.

[0005] Preferably, the locking device includes a rotating rib and a stepped limiting portion cooperating with the rotating rib, the rotating rib is arranged on the inner side of the shoulder sleeve, the stepped limiting portion is arranged at the end of the brush holder away from the brush, the shoulder sleeve and the pen body are rotatably connected, the shoulder sleeve and the tail cover are circumferentially fixed, and the rotating rib can move in or out of the stepped limiting portion under the drive of the tail cover.

[0006] Preferably, the shoulder sleeve and the tail cover are circumferentially fixed by stop ribs.

[0007] Preferably, a second spring is provided between the tail cover and the inner sleeve, and the second spring can pull the button provided on the inner sleeve into the tail cover.

[0008] Preferably, the bristle holder and the ratchet rod are circumferentially fixed by stop ribs.

[0009] Preferably, the tail cover and the shoulder cover are connected via a card point.

[0010] Preferably, the inner sleeve and the button are connected by a snap fastener.

[0011] Preferably, the middle ring is made of aluminum.

[0012] Preferably, a counterweight is provided in the pen body, and the counterweight is provided between the pen tip and the nut.

[0013] The beneficial technical effects of the present invention are as follows: the rear-pressing anti-mistouch switch double-head eyebrow pencil has a hollow structure arranged at the lower end of the pen body, a material body is arranged inside the pen head near the outlet, a front cover is used to protect the pen head, a nut is arranged inside the pen body, a thread is arranged on the inside of the nut, a screw is provided with a thread and is rotatably arranged on the nut, and can move axially by rotating the screw, the lower end of the piston abuts against the upper end of the material body abuts against the screw, the piston is used to push out the material body, the ratchet and the first spring are sleeved on the screw, the two ends of the first spring abut against the nut and the ratchet respectively, and the ratchet is slidingly arranged The ratchet rod is fixed to the screw rod and circumferentially fixed to the screw rod. The ratchet rod is a hollow rod. The upper end of the screw rod is inserted into the ratchet rod. The screw rod can move and rotate axially in the ratchet rod. The ratchet seat is a hollow ring arranged in the pen body. The lower end of the ratchet rod is inserted into the ratchet seat. The upper end of the ratchet wheel is provided with a first one-way jumping tooth, the lower end of the ratchet rod is provided with a ratchet tooth, and the inner side of the lower end of the ratchet seat is provided with a second one-way jumping tooth. The ratchet wheel can rotate under the push of the ratchet rod. The ratchet teeth and the first one-way jumping teeth cooperate to drive the ratchet wheel to rotate and drive the screw rod to rotate, thereby pushing the material body to discharge. The first one-way jumping tooth can be stuck in the second one-way jumping tooth, and the second one-way jumping tooth can ensure that the angle of each rotation of the ratchet is the same, and the amount of material discharged each time is the same. The shoulder sleeve is set at the upper end of the pen body away from the pen head, the upper end of the ratchet rod passes through the shoulder sleeve, the brush seat sleeve is set at the upper end of the ratchet rod, and the bristles are set on the brush seat. The tail cover is detachably set on the upper end of the pen body, the tail cover can protect the bristles and set a button at the same time, and the end of the tail cover is provided with a button, and an inner sleeve is slidingly provided inside the tail cover, and the lower end of the inner sleeve is against the upper end of the brush seat and connected to the button, through the ratchet rod The pressure of the button is transmitted layer by layer through the ratchet, the brush holder and the inner sleeve, causing the ratchet to rotate and drive the screw to rotate, thereby pushing out the material body. Then, the first spring is used to reset the position to realize the function of back-pressing and discharging the material. The brush holder and the shoulder sleeve are provided with a locking device. When the locking device is in the locked state, the brush holder and the shoulder sleeve are axially fixed. The locking device can prevent accidental touch. When the brush holder and the shoulder sleeve are axially fixed, the brush holder cannot move axially, and cannot push the ratchet rod, thereby preventing the ratchet rod from pushing the ratchet to rotate and causing the material body to flow out, thereby preventing waste. It has the advantages of simple operation, stable discharging and anti-accidental touch function. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a cross-sectional view of the whole machine of the present invention;

[0015] Figure 2 This is a cross-sectional view of the entire device of the present invention with the tail cover removed;

[0016] Figure 3 It is a three-dimensional view of the bristle holder of the present invention;

[0017] Figure 4 is a three-dimensional perspective view of the shoulder cover of the present invention;

[0018] Figure 5 This is a three-dimensional perspective view of the present invention when the rotating rib moves into the stepped limiting portion;

[0019] Figure 6 This is a three-dimensional perspective view of the present invention when the rotating rib moves out of the stepped limiting portion;

[0020] Figure 7 is a three-dimensional view of the screw of the present invention;

[0021] Figure 8 is a three-dimensional view of the nut of the present invention;

[0022] Figure 9 is a three-dimensional view of the ratchet of the present invention;

[0023] Figure 10 is a three-dimensional view of the ratchet seat of the present invention;

[0024] Figure 11 is a three-dimensional view of the ratchet lever of the present invention;

[0025] Figure 12 It is a three-dimensional view of the inner sleeve of the present invention;

[0026] in:

[0027] 1. Pen tip; 2. Front cover; 3. Piston;

[0028] 4. Middle ring; 5. Pen body; 6. Screw;

[0029] 7. Nut; 8. First spring; 9. Ratchet;

[0030] 91, first one-way skipping tooth; 10, ratchet seat; 101, second one-way skipping tooth;

[0031] 11. Ratchet lever; 111. Ratchet; 12. Shoulder holster;

[0032] 121. Rotating rib; 13. Brush holder; 131. Stepped limiting portion;

[0033] 14. Brush; 15. Inner sleeve; 16. Tail cover;

[0034] 17. Button; 18. Material body; 19. Second spring;

[0035] 20. Counterweight. DETAILED DESCRIPTION

[0036] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0037] This specific embodiment describes in detail the rear-pressing anti-mistouch switch double-head eyebrow pencil described in this application. Figures 1-12As shown, the rear-press type anti-mistouch switch double-headed eyebrow pencil includes: a pen tip 1, a front cover 2, a piston 3, a middle ring 4, a pen body 5, a screw 6, a nut 7, a first spring 8, a ratchet 9, a ratchet seat 10, a ratchet rod 11, a shoulder sleeve 12, a bristle seat 13, bristles 14, an inner sleeve 15, a tail cover 16 and a button 17. The middle ring 4 is a hollow rod-shaped sleeve arranged on the hollow pen body 5, the pen tip 1 is a hollow structure arranged at one end of the pen body 5, the material body 18 is arranged inside the pen tip 1 near the outlet, the front cover 2 is detachably arranged at one end of the pen body 5 near the pen tip 1, the front cover 2 can cover the pen tip 1, and the front cover 2 can protect the pen tip 1. Nut 7 is disposed within pen body 5. Nut 7 is provided with threads on its inner side. Screw 6 is provided with threads and is rotatably mounted on nut 7. Screw 6 is capable of axial movement by rotating the same. One end of piston 3 abuts material body 18, while the other end abuts screw 6. Piston 3 can move toward the outlet under the push of screw 6, and material body 18 can move out of the outlet under the push of piston 3. Piston 3 is used to push material body 18. Ratchet 9 and first spring 8 are sleeved on screw 6. The two ends of first spring 8 abut nut 7 and ratchet 9, respectively. Ratchet 9 is slidably mounted on screw 6 and circumferentially fixed to screw 6. Ratchet rod 11 is hollow rod-shaped. One end of screw 6 is inserted into ratchet rod 11. Screw 6 can move and rotate axially within ratchet rod 11. Ratchet seat 10 is hollow and annular and disposed within pen body 5. One end of ratchet rod 11 is inserted into ratchet seat 10. The ratchet 9 is provided with a first one-way jumping tooth 91 at one end near the ratchet rod 11, a ratchet 111 is provided at one end near the ratchet 9, and a second one-way jumping tooth 101 is provided on the inner side of one end near the ratchet 9 of the ratchet seat 10. The ratchet 9 can rotate under the push of the ratchet rod 11. The ratchet 111 and the first one-way jumping tooth 91 cooperate to drive the ratchet 9 to rotate and drive the screw 6 to rotate, thereby pushing the material body 18 to discharge. The first one-way jumping tooth 91 can be stuck in the second one-way jumping tooth 101. The second one-way jumping tooth 101 can ensure that the angle of each rotation of the ratchet 9 is the same, ensuring that the amount of material discharged each time is the same. The shoulder sleeve 12 is arranged at the end of the pen body 5 away from the pen head 1, and the end of the ratchet rod 11 away from the ratchet 111 passes through the shoulder sleeve 12, and the brush seat 13 is sleeved on the end of the ratchet rod 11 away from the ratchet 111. The bristles 13 and the ratchet rod 11 are fixed circumferentially, and the bristles 14 are arranged on the bristle seat 13. The tail cover 16 is detachably arranged at the end of the pen body 5 close to the bristle seat 13, and the tail cover 16 can cover the bristles 14. The tail cover 16 can protect the bristles 14 and a button 17 is provided at the end of the tail cover 16. An inner sleeve 15 is slidingly provided inside the tail cover 16, and one end of the inner sleeve 15 abuts against the bristle seat 13 and the other end is connected to the button 17. The ratchet rod 11, the ratchet 9, the bristle seat 13 and the inner sleeve 15 can move axially toward the material body 18 under the push of the button 17 and be reset by the elastic force of the first spring 8.The pressure of the button 17 is transmitted layer by layer through the ratchet rod 11, ratchet wheel 9, brush holder 13 and inner sleeve 15, so that the ratchet wheel 9 rotates and drives the screw rod 6 to rotate, thereby pushing out the material body 18, and then resets by the elastic force of the first spring 8 to realize the function of pressing and discharging. The brush holder 13 and the shoulder sleeve 12 are provided with a locking device. When the locking device is in the locked state, the brush holder 13 and the shoulder sleeve 12 are axially fixed. The locking device can prevent accidental touch. When the brush holder 13 and the shoulder sleeve 12 are axially fixed, the brush holder 13 cannot move axially, and it cannot push the ratchet rod 11, thereby preventing the ratchet rod 11 from pushing the ratchet wheel 9 to rotate and causing the material body 18 to flow out, thereby preventing waste. It has the advantages of simple operation, stable discharging and anti-accidental touch function.

[0038] In this embodiment, preferably, the locking device includes a rotating rib 121 and a stepped limiting portion 131 cooperating with the rotating rib 121. The rotating rib 121 is arranged on the inner side of the shoulder sleeve 12, and the stepped limiting portion 131 is arranged at the end of the brush holder 13 away from the brush. The shoulder sleeve 12 and the pen body 5 are rotatably connected, and the shoulder sleeve 12 and the tail cover 16 are circumferentially fixed. The rotating rib 121 can move in or out of the stepped limiting portion 131 under the drive of the tail cover 16. The tail cover 16 that is rotated and circumferentially fixed to the shoulder sleeve 12 can snap the rotating rib 121 into the stepped limiting portion 131, thereby blocking the brush holder 13 from moving axially. The tail cover 16 that is rotated in the opposite direction and circumferentially fixed to the shoulder sleeve 12 can move the rotating rib 121 out of the stepped limiting portion 131, thereby ensuring that the axial movement of the brush holder 13 is unobstructed, thereby preventing accidental touch.

[0039] In this embodiment, preferably, the shoulder sleeve 12 and the tail cover 16 are circumferentially fixed by stop ribs, and the circumferential fixing of the shoulder sleeve 12 and the tail cover 16 by the stop ribs makes the fixing effect more secure.

[0040] In this embodiment, preferably, a second spring 19 is provided between the tail cover 16 and the inner sleeve 15. The second spring 19 can pull the button 17 provided on the inner sleeve 15 into the tail cover 16. By providing the second spring 19, when the tail cover 16 is removed from the pen body 5, the button 17 can be pulled back into the tail cover 16 by the pulling force of the second spring 19 to protect the button 17.

[0041] In this embodiment, preferably, the bristle holder 13 and the ratchet rod 11 are circumferentially fixed by stop ribs, and the circumferential fixing of the bristle holder 13 and the ratchet rod 11 by the stop ribs makes the fixing effect more reliable.

[0042] In this embodiment, preferably, the tail cover 16 and the shoulder cover 12 are connected by a card point. The connection between the tail cover 16 and the shoulder cover 12 by the card point is more reliable and the assembly is more convenient.

[0043] In this embodiment, preferably, the inner sleeve 15 and the button 17 are connected by a snap-fit ​​connection. The snap-fit ​​connection between the inner sleeve 15 and the button 17 is more secure and more convenient to assemble.

[0044] In this embodiment, the middle ring 4 is preferably made of aluminum. The middle ring 4 made of aluminum can be more wear-resistant and has higher strength.

[0045] In this embodiment, preferably, a counterweight 20 is further provided in the pen body 5, and the counterweight 20 is provided between the pen tip 1 and the nut 7. By providing the counterweight 20 between the pen tip 1 and the nut 7, the center of gravity of the pen body 5 can be balanced, thereby increasing the sense of coordination when holding.

[0046] The double-headed eyebrow pencil using the rear-pressing anti-accidental-touch switch in this embodiment has the advantages of easy operation, stable discharge, and anti-accidental-touch function.

Claims

1. A double-headed eyebrow pencil with a rear-pressing anti-accidental-touch switch, characterized in that: include: The pen tip (1), front cover (2), piston (3), middle ring (4), pen body (5), screw (6), nut (7), first spring (8), ratchet (9), ratchet seat (10), ratchet rod (11), shoulder cover (12), bristle seat (13), bristles (14), inner cover (15), tail cover (16) and button (17) are provided. The middle ring (4) is a hollow rod-shaped sleeve arranged on the hollow pen body (5). The pen tip (1) is a hollow structure arranged at one end of the pen body (5). The material body (18) is arranged inside the pen tip (1) near the outlet. The front cover (2) is detachably arranged at one end of the pen body (5) near the pen tip (1). The front cover (2) can cover the pen tip (1). The nut (7) is arranged in the pen body (5). The inner side of the nut (7) is provided with The screw rod (6) is provided with a thread and is rotatably arranged on the nut (7). One end of the piston (3) abuts against the material body (18) and the other end abuts against the screw rod (6). The piston (3) can move toward the outlet under the push of the screw rod (6). The material body (18) can move out of the outlet under the push of the piston (3). The ratchet (9) and the first spring (8) are sleeved on the screw rod (6). The two ends of the first spring (8) abut against the nut (7) and the ratchet (9) respectively. The ratchet (9) is slidably arranged on the screw rod (6) and is circumferentially fixed to the screw rod (6). The ratchet rod (11) is a hollow rod. One end of the screw rod (6) is inserted into the ratchet rod (11). The screw rod (6) can move and rotate axially in the ratchet rod (11). The ratchet seat (10) is a hollow ring arranged on the pen body (5). ), one end of the ratchet rod (11) is inserted into the ratchet seat (10), the end of the ratchet wheel (9) close to the ratchet rod (11) is provided with a first one-way jumping tooth (91), the end of the ratchet rod (11) close to the ratchet wheel (9) is provided with a ratchet tooth (111), the inner side of the end of the ratchet seat (10) close to the ratchet wheel (9) is provided with a second one-way jumping tooth (101), the ratchet wheel (9) can rotate under the push of the ratchet rod (11), the first one-way jumping tooth (91) can be stuck in the second one-way jumping tooth (101), the shoulder sleeve (12) is provided at the end of the pen body (5) away from the pen head (1), the end of the ratchet rod (11) away from the ratchet tooth (111) passes through the shoulder sleeve (12), the brush seat (13) is sleeved on the end of the ratchet rod (11) away from the ratchet tooth (111), and the brush seat (13) is sleeved on the end of the ratchet rod (11) away from the ratchet tooth (111). The bristle seat (13) and the ratchet rod (11) are circumferentially fixed, the bristles (14) are arranged on the bristle seat (13), the tail cover (16) is detachably arranged on one end of the pen body (5) close to the bristle seat (13), the tail cover (16) can cover the bristles (14), the end of the tail cover (16) is provided with a button (17), an inner sleeve (15) is slidably provided inside the tail cover (16), one end of the inner sleeve (15) abuts against the bristle seat (13) and the other end is connected to the button (17), the ratchet rod (11), the ratchet wheel (9), the bristle seat (13) and the inner sleeve (15) can move axially toward the material body (18) under the push of the button (17) and reset by the elastic force of the first spring (8), the bristle seat (13) and the shoulder sleeve (12) are provided with a locking device,When the locking device is in the locked state, the bristle holder (13) and the shoulder sleeve (12) are axially fixed.

2. The double-headed eyebrow pencil with a rear-pressing anti-accidental-touch switch according to claim 1, characterized in that: The locking device comprises a rotating rib (121) and a stepped limiting portion (131) cooperating with the rotating rib (121); the rotating rib (121) is arranged on the inner side of the shoulder sleeve (12); the stepped limiting portion (131) is arranged at the end of the brush holder (13) away from the brush; the shoulder sleeve (12) and the pen body (5) are rotatably connected; the shoulder sleeve (12) and the tail cover (16) are circumferentially fixed; and the rotating rib (121) can be moved into or out of the stepped limiting portion (131) under the drive of the tail cover (16).

3. The double-headed eyebrow pencil with a rear-pressing anti-accidental-touch switch according to claim 2, characterized in that: The shoulder sleeve (12) and the tail cover (16) are circumferentially fixed by stop ribs.

4. The double-headed eyebrow pencil with a rear-pressing anti-accidental-touch switch according to claim 1, characterized in that: A second spring (19) is provided between the tail cover (16) and the inner sleeve (15), and the second spring (19) can pull the button (17) provided on the inner sleeve (15) into the tail cover (16).

5. The double-headed eyebrow pencil with a rear-pressing anti-accidental-touch switch according to claim 1, characterized in that: The bristle seat (13) and the ratchet rod (11) are circumferentially fixed via stop ribs.

6. The double-headed eyebrow pencil with a rear-pressing anti-accidental-touch switch according to claim 1, characterized in that: The tail cover (16) and the shoulder cover (12) are connected via a card point.

7. The double-headed eyebrow pencil with a rear-pressing anti-accidental-touch switch according to claim 1, characterized in that: The inner sleeve (15) and the button (17) are connected via a snap fastener.

8. The double-headed eyebrow pencil with a rear-pressing anti-accidental-touch switch according to claim 1, characterized in that: The middle ring (4) is made of aluminum.

9. The double-headed eyebrow pencil with a rear-pressing anti-accidental-touch switch according to any one of claims 1 to 8, characterized in that: A counterweight (20) is also provided in the pen body (5), and the counterweight (20) is provided between the pen head (1) and the nut (7).

Citation Information

Patent Citations

  • Double-end eyebrow pencil with rear pressing type mistaken touch prevention switch

    CN217137114U