Side-pressing highlighter with replaceable refill

Abstract

The side-pressing nite writer pen comprises the refill, an outer rod, a transmission mechanism, a side-pressing mechanism and a pressing mechanism, the refill comprises a pen point, a fixed refill, a water storage replacement refill, an oil pipe front section and an oil pipe rear section, the pen point is arranged at the foremost end of the oil pipe front section and is partially exposed, and the side, close to the water storage replacement refill, of the fixed refill is of a tip structure. The water storage refill is detachably connected with the tip of the fixed refill, so that the pen holder can be used in multiple colors by replacing the refill; the middle rear section of the outer rod is provided with a key hole position for containing the side pressing mechanism, the pressing mechanism is arranged at the tail end of the outer rod, the transmission mechanism moves under the action of the pressing mechanism, and the transmission mechanism restores to the original position under the action of the side pressing mechanism, so that the operation convenience and interestingness of the nite writer pen are enhanced.

Description

Technical Field

[0001] This patent relates to the field of stationery products, and in particular to a side-press fluorescent pen with replaceable refills. Background Art

[0002] A highlighter pen is a type of stationery item that uses thicker and lighter inks of different colors to cover key areas for marking. After marking, the obscured text becomes clear at a glance. Highlighters are water-resistant and do not fade. They are mainly used for writing, marking, and annotating, and are widely used in transportation, learning, and office environments. The structure of this type of pen generally includes a detachable pen body and a pen cap. When using, the pen cap is pulled out and then put back on after use. However, since the pen cap is detachable from the pen body, users often forget to put the pen cap back on after use, leaving the pen tip directly exposed to the air, thereby shortening the pen's service life and causing waste.

[0003] Ballpoint pens don't require a cap, making them incredibly easy to use without having to worry about the cap falling off. This structure has been adapted for use in highlighters, making them more accessible to everyone. While there are a growing number of highlighter pens on the market, demand for a wide variety of colors is high. However, highlighters generally feature a cylindrical, plug-in design, making them difficult to operate with one hand. Furthermore, the lack of refills results in a limited selection of colors. This led to the development of a replaceable side-press highlighter, which allows consumers to retract the refill with one hand, while also allowing for multiple, reusable colors. Utility Model Content

[0004] In order to improve the convenience of fluorescent pen operation and meet the needs of multi-color replacement, this patent provides the following technical solutions:

[0005] First aspect: Provided is a side-pressing fluorescent pen with a replaceable refill, comprising a refill, an outer rod, a transmission mechanism, a side-pressing mechanism, and a pressing mechanism. The transmission mechanism is sleeved on the outside of the refill and can drive the refill to move in the axial direction of the fluorescent pen. The outer rod is sleeved on the outside of the transmission mechanism. The outer rod has a button hole for accommodating the side-pressing mechanism. The pressing mechanism is provided at the end of the outer rod. Under the action of the pressing mechanism, the transmission mechanism can drive the refill to extend out of the outer rod for writing. When the side-pressing mechanism is pressed, the transmission mechanism can drive the refill to retract into the outer rod.

[0006] Furthermore, the side pressing mechanism can be displaced in the radial direction of the fluorescent pen, and the transmission mechanism includes a cantilever, which can be driven by the movement of the side pressing mechanism in the radial direction, so that the cantilever is displaced in the radial direction synchronously.

[0007] Furthermore, the transmission mechanism includes an inner rod, which tightly wraps the rear section of the oil pipe and the shape of the inner rod is adapted to the shape of the rear section of the oil pipe. A cantilever is provided on the inner rod, and the end of the cantilever has a protruding first fixed block, and the end of the inner rod is provided with a recessed sixth limit groove and a seventh limit groove.

[0008] Furthermore, the pen core also includes a pen tip, a fixed core, a water storage core and a front section of the oil pipe. The front section of the oil pipe wraps the pen tip and the fixed core, and the rear section of the oil pipe wraps the water storage core. The pen tip, the fixed core and the water storage core are arranged in sequence from front to back along the axial direction. The pen tip is located at the front end of the front section of the oil pipe and is partially exposed. The fixed core is a tip structure close to the water storage core. The water storage core is detachably connected to the tip of the fixed core.

[0009] Furthermore, the pressing mechanism includes a core plug and a pressing head, and the pressing head is provided with a fixed rib position, a sixth fixed block and a seventh fixed block; the core plug is provided with a clamping rib position for fixing the end of the water storage core.

[0010] Furthermore, the outer rod also includes a nib holder assembly groove, which is arranged inside the front end of the outer rod. The nib holder assembly groove is a cup-shaped groove for accommodating and fixing the nib.

[0011] Furthermore, the transmission mechanism also includes a nib holder and a spring. The nib holder is fixedly connected to one end of the spring. The nib holder and the nib holder assembly groove are engaged or separated under the action of the spring. The spring is wound around the front section of the oil pipe, and the other end of the spring is fixed to the rear section of the oil pipe. The nib holder includes a sliding block, a sealing ring and a limit block.

[0012] Furthermore, the side pressing mechanism includes a button and a button frame, and the button and the button frame are detachably assembled on the button hole, and the inner walls of the button and the button frame form a first limiting groove; a second fixing block and a third fixing block are respectively provided on both sides of the button, and the button frame includes a second limiting groove, a third limiting groove, a fourth fixing block, and a fifth fixing block.

[0013] Furthermore, the fluorescent pen has two mating states: an extended state or a retracted state; the pressing mechanism is pressed to push the cantilever to displace axially forward, the spring at the front end of the inner rod is in a compressed state, the pen tip holder enters the pen tip holder assembly slot, and the fluorescent pen changes from a retracted state to an extended state. When the cantilever moves to the bottom of the side pressing mechanism, the first fixed block and the first limiting groove form a fixed structure in a snap-fit ​​manner, and the pen tip cannot retract automatically; the side pressing mechanism is pressed to displace radially downward, so that the first fixed block leaves the first limiting groove, and the spring changes from a compressed state to an extended state, pushing the inner rod backward axially until it returns to its original position. At this time, the fluorescent pen changes from an extended state to a retracted state.

[0014] This patent has the following beneficial effects:

[0015] This patent discloses a side-pressing fluorescent pen with replaceable refills, comprising a refill, an outer rod, a transmission mechanism, a side-pressing mechanism and a pressing mechanism. The refill comprises a pen tip, a fixed core, a water storage refill and an oil pipe. The pen tip is arranged at the front end of the front section of the oil pipe and is partially exposed. The fixed core is a tip structure close to the water storage refill on one side. The water storage refill is detachably connected to the tip of the fixed core, thereby enabling a pen to be used in multiple colors by replacing the refill. The middle and rear sections of the outer rod have a button hole for accommodating the side-pressing mechanism, and the pressing mechanism is arranged at the end of the outer rod. The transmission mechanism is displaced under the action of the pressing mechanism, and the transmission mechanism returns to its original position under the action of the side-pressing mechanism, thereby enhancing the convenience and fun of operating the fluorescent pen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of this patent, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of this patent and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a front view of a replaceable side-press fluorescent pen in the retracted state;

[0018] Figure 2 This is a cross-sectional view of a replaceable side-press fluorescent pen in the retracted state;

[0019] Figure 3 This is a cross-sectional view of a replaceable fluorescent pen refill of this patent;

[0020] Figure 4 This is a front view of the outer rod of a side-press fluorescent pen with a replaceable core according to the present patent;

[0021] Figure 5 This is a cross-sectional view of the outer rod of a replaceable core side-press fluorescent pen of this patent;

[0022] Figure 6 This is a cross-sectional view of the transmission mechanism of a replaceable core side-press fluorescent pen in this patent;

[0023] Figure 7 This is a front view of the inner rod of a replaceable side-press fluorescent pen of this patent;

[0024] Figure 8 This is a cross-sectional view of the inner rod of a replaceable core side-press fluorescent pen of this patent;

[0025] Figure 9 This is a schematic diagram of the three-dimensional structure of a replaceable core side-press fluorescent pen button in this patent;

[0026] Figure 10This is a schematic diagram of the three-dimensional structure of a replaceable core side-press fluorescent pen button holder of this patent;

[0027] Figure 11 This is a front view of a replaceable side-press fluorescent pen head according to the present patent;

[0028] Figure 12 This is a side view of a replaceable side-press fluorescent pen head according to the present patent;

[0029] Figure 13 This is a cross-sectional view of a replaceable side-press fluorescent pen head according to the present patent;

[0030] Figure 14 This is a front view of a replaceable side-press fluorescent pen refill plug of this patent;

[0031] Figure 15 This is a cross-sectional view of a replaceable side-press fluorescent pen refill plug in this patent;

[0032] Figure 16 This is a front view of a replaceable side-press fluorescent pen in the extended state;

[0033] Figure 17 This is a cross-sectional view of a replaceable side-press fluorescent pen in the extended state;

[0034] Figure 18 This is a cross-sectional view of a replaceable water storage refill for a fluorescent pen in this patent.

[0035] The description of the accompanying drawings is as follows:

[0036] 100: Pen refill

[0037] 110: Pen tip

[0038] 120: Fixed core

[0039] 130: Water storage core

[0040] 140: Front section of the oil pipe

[0041] 150: rear section of the oil pipe

[0042] 200: External rod

[0043] 210: Pen holder assembly slot

[0044] 220: Button hole

[0045] 300: Transmission mechanism

[0046] 310: Pen holder

[0047] 311: Slider

[0048] 312: Limit block

[0049] 313: Sealing ring

[0050] 320: Spring

[0051] 330: Inner rod

[0052] 331: Cantilever

[0053] 332: First fixed block

[0054] 333: Sixth limit slot

[0055] 334: Seventh limit slot

[0056] 400: Side press mechanism

[0057] 410: Button

[0058] 411: First limit slot

[0059] 412: Second fixed block

[0060] 413: Third fixed block

[0061] 420: Button rack

[0062] 421: Second limit slot

[0063] 422: The third limit slot

[0064] 423: Fourth fixed block

[0065] 424: Fifth fixed block

[0066] 500: Pressing mechanism

[0067] 510: Core plug

[0068] 511: Clamping rib position

[0069] 520: Press your head

[0070] 521: Fixed rib position

[0071] 522: Sixth fixed block

[0072] 523: Seventh fixed block DETAILED DESCRIPTION

[0073] The detailed features and advantages of this patent are described in detail below in the specific implementation method. The content is sufficient to enable any technical personnel in this field to understand the technical content of this patent and implement it accordingly. Based on the description, claims and drawings disclosed in this specification, technical personnel in this field can easily understand the relevant purposes and advantages of this patent.

[0074] In order to make the purpose, technical solutions and advantages of this patent clearer, the implementation methods of this patent will be further described in detail below with reference to the accompanying drawings.

[0075] like Figure 1 and Figure 2 The diagrams and cross-sectional views of a retracted side-press highlighter with a replaceable refill according to this embodiment are shown. The pen includes a refill 100, an outer rod 200, a transmission mechanism 300, a side-press mechanism 400, and a pressing mechanism 500. The transmission mechanism 300 is mounted externally on the refill 100 and is capable of driving the refill 100 to move in the axial direction of the highlighter. The outer rod 200 is mounted externally on the transmission mechanism 300. The rear portion of the outer rod 200 includes a button hole 220 for accommodating the side-press mechanism 400. The pressing mechanism 500 is located at the distal end of the outer rod 200. The transmission mechanism 300 is displaced by the pressing mechanism 500 and returned to its original position by the side-press mechanism 400.

[0076] like Figure 3 The figure shows a cross-sectional view of a replaceable highlighter refill according to this embodiment, comprising a tip 110, a fixed core 120, a water refill 130, a front section 140 of the oil pipe, and a rear section 150 of the oil pipe. The front section 140 and the rear section 150 are combined to form a stepped shape consisting of cylinders of varying diameters. The front section 140 has a smaller diameter, while the rear section 150 has a larger diameter. The front section 140 encloses the tip 110 and fixed core 120, while the rear section 150 encloses the water refill 130. The pen tip 110, the fixed core 120 and the water storage refill core 130 are arranged in sequence from front to back along the axial direction. The pen tip 110 is located at the front end of the oil pipe front section 140 and is partially exposed. The exposed part of the pen tip 110 is beveled; one side of the fixed core 120 is connected to the pen tip 110, and the side close to the water storage refill core 130 is a tip structure inserted into the water storage refill core 130. The water storage refill core 130 is detachably connected to the tip of the fixed core 120; the length of the water storage refill core 130 is longer than the rear section 150 of the oil pipe, so that the end of the water storage refill core 130 is partially exposed from the end of the rear section 150 of the oil pipe.

[0077] like Figure 4-5 The figure shows a schematic diagram and cross-sectional view of the outer rod of this embodiment. The outer rod 200 includes a nib holder assembly slot 210 and a button hole 220. The nib holder assembly slot 210 is located inside the front end of the outer rod 200. It is a cup-shaped recessed structure that accommodates and secures the nib 110. It is open at both ends, both larger than the nib 110. The front end has a smaller diameter, while the rear end is large enough to accommodate the nib holder 310. The button hole 220 is an elliptical circular hole that is slightly concave inward.

[0078] like Figure 6As shown, this is a cross-sectional view of the transmission mechanism in this embodiment. The transmission mechanism 300 includes a pen tip holder 310, a spring 320 and an inner rod 330. The pen tip holder 310 includes a sliding block 311, a sealing ring 313 and a limit block 312. The sliding block 311, the sealing ring 313 and the limit block 312 are roughly "L"-shaped structures, and in this embodiment are symmetrically distributed along the axis of the fluorescent pen. The long arm of the sliding block 311 is in contact with the inner wall of the pen tip holder assembly groove 210 of the outer rod 200 and can be displaced on the inner wall. The short arm of the sliding block 311 is offset against the short arm of the limit block 312. The length of the long arm of the limit block 312 is greater than the length of the exposed part of the pen tip 110. The short arm of the limit block 312 is tightly fitted with the short arm of the sealing ring 313. The exposed part of the pen tip 110 is located in the cavity enclosed by the sliding block 311, the sealing ring 313 and the limit block 312. The pen holder 310 is fixedly connected to one end of the spring 320. The pen holder 310 and the pen holder assembly slot 210 are engaged or separated under the action of the spring 320. The spring 320 is wound around the front section 140 of the oil pipe, and the other end of the spring 320 is fixed to the rear section 150 of the oil pipe. The inner rod 330 tightly wraps around the rear section 150 of the oil pipe and the shape of the inner rod 330 is adapted to the shape of the rear section 150 of the oil pipe. The front end of the inner rod 330 wraps around the front section 140 of the oil pipe. Figure 7-8 As shown, the inner rod is formed in a stepped shape by two cylinders of inconsistent diameters. A cantilever 331 is provided at the rear section of the inner rod 330. The non-fixed end of the cantilever 331 has freedom and can be displaced radially when subjected to force. The end of the cantilever 331 has a protruding first fixed block 332, and the end of the inner rod 330 is provided with a recessed sixth limiting groove 333 and a seventh limiting groove 334.

[0079] like Figure 9-10The following is a schematic diagram and cross-sectional view of the side-pressing mechanism of this embodiment. The side-pressing mechanism 400 includes a button 410 and a button frame 420. The button 410 and the button frame 420 are detachably joined at the button hole 220 and form a first retaining groove 411 below. A second fixing block 412 and a third fixing block 413 are respectively provided on either side of the button 410. The button frame 420 includes a second retaining groove 421, a third retaining groove 422, a fourth fixing block 423, and a fifth fixing block 424. The top of the button 410 is an oval, smooth surface, and the bottom is an indented structure with a cylindrical protrusion in the middle. The second fixing block 412 and the third fixing block 413 are respectively provided on either side of the bottom. The second fixing block 412 and the third fixing block 413 are bar-shaped, hook-shaped blocks. The key frame 420 is an elliptical hollow frame, whose shape and size are compatible with the key 410. A fourth, hook-shaped fixing block 423 and a fifth, hook-shaped fixing block 424 are respectively provided at the front and rear ends of the key frame 420 along the axial bottom. The left and right sides of the key frame 420 are recessed inwardly along the axial direction to form a second limiting groove 421 and a third limiting groove 422 that are compatible with the second and third fixing blocks 412, 413. When the second fixing block 412 of the key 410 engages with the second limiting groove 421 of the key frame 420, and the third fixing block 413 engages with the third limiting groove 422, the key 410 is fixed to the key frame 420. The cylindrical protrusion in the middle of the bottom of the key 410 forms a first limiting groove 411 with the bottom surface of the key 410. The first limiting groove 411 is sized to accommodate the first fixing block 332 on the cantilever 331.

[0080] like Figure 11-15 The figure shows the structure diagram and cross-sectional view of the pressing mechanism of this embodiment. The pressing mechanism 500 includes a core plug 510 and a pressing head 520. The core plug 510 is a cylindrical pen cap structure. In this embodiment, the inner wall is provided with six clamping ribs 511 for fixing the end of the water storage refill 130. The press head 520 is a cylindrical pen cap structure. The press head 520 can completely accommodate the core plug 510. Two fixing ribs 521 are provided inside the press head 520 for fixing the core plug 120. Strip-shaped hook-shaped blocks are provided on both sides of the bottom of the press head 520, which are the sixth fixing block 522 and the seventh fixing block 523 respectively. The sixth fixing block 522 and the seventh fixing block 523 are adapted to the sixth limiting groove 333 and the seventh limiting groove 334 on the inner rod 330. When the sixth fixing block 522 and the sixth limiting groove 333 form a snap-fit ​​structure, and the seventh fixing block 523 and the seventh limiting groove 334 form a snap-fit ​​structure, the press head 520 is snapped onto the end of the inner rod 330 and can be displaced simultaneously with the inner rod 330.

[0081] like Figure 16-17The figure shows a schematic diagram and a cross-sectional view of a replaceable side-press highlighter in the extended state according to this embodiment. The highlighter has two mating states: an extended state and a retracted state. When forward pressure is applied to the push head 520 in the axial direction, the push head 520 moves forward, and the inner rod 330, which is engaged with the push head 520, moves forward equidistantly in synchronization. When the cantilever 331 on the inner rod 330 moves forward to below the side-pressing mechanism 400, the first fixing block 332 enters the first limiting groove 411 and securely engages. The inner rod 330 moves forward, pushing the spring 320. The spring 320 gradually changes from an extended state to a compressed state, increasing its elastic potential energy. The nib holder 310 slides into the nib holder assembly slot 210, and the highlighter changes from a retracted state to an extended state. The nib 110 cannot automatically retract. Applying radially downward pressure to the button 410 causes the button 410 to move radially downward. The cylindrical protrusion at the bottom center of the button 410 presses radially downward on the cantilever 331, causing the non-fixed end of the cantilever 331 to elastically deform until the first fixed block 332, which is engaged, disengages from the first retaining groove 411. At this point, the elastic potential energy of the spring 320 is converted into kinetic energy, changing from a compressed state to an extended state. The spring 320 applies an axially backward thrust to the inner rod 330 until the inner rod 330 returns to its original position, at which point the highlighter changes from an extended state to a retracted state. It will be readily understood that the material of the refill 100, outer rod 200, transmission mechanism 300, side pressing mechanism 400, and pressing mechanism 500 in this embodiment is preferably plastic, which has a certain degree of elasticity and can produce slight deformation, making the above-mentioned change process easy to achieve.

[0082] like Figure 18 The figure shows a cross-sectional view of a replaceable side-press highlighter refill according to this embodiment. To replace the refill, a radial compressive force is applied to the sixth and seventh fixing blocks 522 and 523 of the pusher 520. This forces the sixth fixing block 522 and the sixth limiting groove 333, and the seventh fixing block 523 and the seventh limiting groove 334, which are engaged with each other. The pusher 520 and the core plug 510 are then removed, exposing the distal end of the refill 130. A rearward axial pull is then applied to the distal end of the refill 130, separating it from the tip of the fixed core 120. The refill 130 in the rear section 150 of the oil pipe is then removed, and a new refill 130 is inserted into the rear section 150. The core plug 510 is then replaced, and the sixth fixing block 522 and the sixth limiting groove 333, and the seventh fixing block 523 and the seventh limiting groove 334 are reengaged. The refill is now complete.

[0083] In the specification of this patent, directional terms such as "front", "back", "up", "down", "left", "right", "side", "top", "bottom", etc. are used to describe various example structural parts and components of this patent. However, these terms are used here for convenience of description only and are determined based on the example orientations shown in the accompanying drawings. Since the embodiments disclosed in this patent can be set in different directions, these directional terms are only for illustration and should not be regarded as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0084] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, this patent will not further describe various possible combinations.

[0085] In addition, the various implementation methods of this patent can be arbitrarily combined, as long as they do not violate the concept of this patent, they should also be regarded as the content disclosed by this patent.

Claims

1. A side-press fluorescent pen with replaceable refill, characterized in that: The invention comprises a pen core (100), an outer rod (200), a transmission mechanism (300), a side pressing mechanism (400) and a pressing mechanism (500); the transmission mechanism (300) is sleeved outside the pen core (100) and can drive the pen core (100) to move in the axial direction of the fluorescent pen; the outer rod (200) is sleeved outside the transmission mechanism (300); the outer rod (200) has a key hole (220) for accommodating the side pressing mechanism (400); the pressing mechanism (500) is arranged at the end of the outer rod (200); under the action of the pressing mechanism (500), the transmission mechanism (300) can drive the pen core (100) to extend out of the outer rod (200) for writing; and when the side pressing mechanism (400) is pressed, the transmission mechanism (300) can drive the pen core (100) to retract into the outer rod (200).

2. The fluorescent pen according to claim 1, characterized in that: The side pressing mechanism (400) can be displaced in the radial direction of the fluorescent pen, and the transmission mechanism (300) comprises a cantilever (331), and the cantilever (331) can be driven by the movement of the side pressing mechanism (400) in the radial direction, so that the cantilever (331) is displaced in the radial direction synchronously.

3. The fluorescent pen according to claim 2, characterized in that: The transmission mechanism (300) comprises an inner rod (330), the inner rod (330) tightly wraps the rear section (150) of the oil pipe and the shape of the inner rod (330) is adapted to the shape of the rear section (150) of the oil pipe, the inner rod (330) is provided with the cantilever (331), the end of the cantilever (331) has a protruding first fixing block (332), and the end of the inner rod (330) is provided with a recessed sixth limiting groove (333) and a seventh limiting groove (334).

4. The fluorescent pen according to claim 3, characterized in that: The pen core (100) further comprises a pen tip (110), a fixed core (120), a water storage core (130) and a front section of an oil pipe (140); the front section of the oil pipe (140) wraps the pen tip (110) and the fixed core (120); the rear section of the oil pipe (150) wraps the water storage core (130); the pen tip (110), the fixed core (120) and the water storage core (130) are arranged in sequence from front to back along the axial direction; the pen tip (110) is arranged at the front end of the front section of the oil pipe (140) and is partially exposed; the fixed core (120) is close to the water storage core (130) on a side thereof and is a tip structure; the water storage core (130) is detachably connected to the tip of the fixed core (120).

5. The fluorescent pen according to claim 4, characterized in that: The pressing mechanism (500) comprises a core plug (510) and a pressing head (520), wherein a fixing rib (521), a sixth fixing block (522) and a seventh fixing block (523) are arranged inside the pressing head (520); The core plug (510) is provided with a clamping rib (511) for fixing the end of the water storage core (130).

6. The fluorescent pen according to claim 4, characterized in that: The outer rod (200) further comprises a pen tip holder assembly groove (210), wherein the pen tip holder assembly groove (210) is arranged inside the front end of the outer rod (200), and the pen tip holder assembly groove (210) is a cup-shaped structural groove for accommodating and fixing the pen tip (110).

7. The fluorescent pen according to claim 6, characterized in that: The transmission mechanism (300) further comprises a pen tip frame (310) and a spring (320), wherein the pen tip frame (310) is fixedly connected to one end of the spring (320), and the pen tip frame (310) and the pen tip frame assembly groove (210) are matched or separated under the action of the spring (320), and the spring (320) is wound around the front section (140) of the oil pipe, and the other end of the spring (320) is fixed to the rear section (150) of the oil pipe; The pen tip holder (310) comprises a sliding block (311), a sealing ring (313) and a limiting block (312).

8. The fluorescent pen according to claim 7, characterized in that: The side pressing mechanism (400) comprises a button (410) and a button frame (420), wherein the button (410) and the button frame (420) are detachably assembled on the button hole (220), and the button (410) and the inner wall of the button frame (420) form a first limiting groove (411); A second fixing block (412) and a third fixing block (413) are respectively provided on both sides of the button (410), and the button frame (420) comprises a second limiting groove (421), a third limiting groove (422), a fourth fixing block (423), and a fifth fixing block (424).

9. The fluorescent pen according to claim 8, characterized in that: The fluorescent pen has two mating states, namely, an extended state and a retracted state; the pressing mechanism (500) is pressed to push the cantilever (331) to move forward in the axial direction, the spring (320) at the front end of the inner rod (330) is in a compressed state, the pen head holder (310) enters the pen head holder assembly slot (210), and the fluorescent pen changes from the retracted state to the extended state; when the cantilever (331) moves below the side pressing mechanism (400), the first fixing block (332) and the first limiting slot (411) form a fixed structure in a snap-fit ​​manner, and the pen head (110) cannot automatically retract; the side pressing mechanism (400) is pressed to move downward in the radial direction, so that the first fixing block (332) leaves the first limiting slot (411), and the spring (320) changes from the compressed state to the extended state, pushing the inner rod (330) to move backward in the axial direction until it returns to its original position, and at this time, the fluorescent pen changes from the extended state to the retracted state.

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