Slide-out sidewall ballpoint pen with eraser pad

Abstract

Sliding sidewall ballpoint pen with an eraser block The present invention relates to a sliding sidewall ballpoint pen with an eraser block (2), which adopts a driving member (4) provided on the peripheral wall of the handle (1) of said ballpoint pen for sliding driving to make the eraser block (2) at the upper end of the handle (1) of said ballpoint pen fixed relative to the handle (1) of said pen, so as to prevent the eraser block (2) from being interfered with by the pen refill control assembly when in use, thereby affecting the erasing effect and damaging the assembly of the pen refill control assembly. Figure to be published with the abstract: Figure 1

Description

Title of invention: Sliding sidewall ballpoint pen with an erasing block Technical field

[0001] The present invention relates to the field of stationery and in particular it relates to a sliding sidewall ballpoint pen with an erasing block. State of the prior art

[0002] A ballpoint pen is a pen in which ink comes out by rolling a ball at the front end of a pen or refill to write. Conventional ballpoint pens do not require the installation of an eraser block because the ink used for writing is not erasable, but with the improvement of ink, existing ballpoint pens can use erasable ink (such as heat-sensitive ink, etc.), which makes it necessary to equip ballpoint pens with an eraser block to erase what has been written by the eraser block in the event of a writing error or similar event.

[0003] In order to prevent the eraser block from being lost, interfering with the writing of the tip and hindering the holding of the handle, the eraser block is generally provided at the end of the handle which is far from the tip. A main structure of existing ballpoint pens is a structure with a tip that comes out upon pressing, the press control structure of which is located at the end of the handle which is far from the tip, that is, it must be provided at the same position of the eraser block, so that the eraser block must be installed in the press structure, so that when using the eraser block to erase the writing content, the elastic press control structure makes the application of the eraser block force inconvenient (affecting the effect of erasing), and the repeated movement of the press control structure is likely to cause damage.

[0004] Content of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a sliding sidewall ballpoint pen with an erasing block, which adopts a driving member provided on the peripheral wall of the handle of said ballpoint pen for sliding driving to make the erasing block at the upper end of the handle of said ballpoint pen fixed relative to the handle of said pen, so as to prevent the erasing block from being interfered with by the pen refill control assembly when in use, thereby affecting the erasing effect and damaging the assembly of the pen refill control assembly.

[0006] In order to achieve the above-mentioned objective, the present invention relates to a pen A sliding sidewall ballpoint pen with an eraser block, comprising: a handle, in which a mounting cavity is provided, an outlet and inlet port in communication with said mounting cavity being provided at the lower end of said handle, a sidewall notch in communication with said mounting cavity being provided on the sidewall of said handle, and said sidewall notch being provided extending along the length direction of said handle; an eraser block, said eraser block being provided at the upper end of said handle; a pen refill, said pen refill being slidably mounted inside said handle, and a pen tip being provided at the lower end of said pen refill;a drive member, said drive member being slidably mounted in said side wall notch, said drive member having a driven portion located outside the side wall of said handle, said drive member having a driving portion located inside said mounting cavity; and a refill control assembly, said refill control assembly being provided inside said mounting cavity, and said refill control assembly being used to be driven by said driving portion to control said pen tip to extend through said exit and entry port or to retract into said mounting cavity. ;

[0007] In one embodiment, the ballpoint pen further comprises a plurality of positioning ratchet wheels arranged at equal circumferential spacing and positioning grooves between said positioning ratchet wheels adjacent the inner peripheral wall of said mounting cavity; said refill control assembly comprising: a rotatable component, on which one or a plurality of ratcheting protruding strips are provided for snapping onto said positioning ratchet wheels or said positioning grooves;ratchet wheel members, said ratchet wheel member being slidably installed inside said mounting cavity, said ratchet wheel member being used to slide downward under the action of said driving portion, a plurality of ratchet wheel projections being provided in a circumferential direction on said ratchet wheel members, said ratchet wheel projections being used to drive the circumferential rotation of said ratchet protruding bands; a return member, said return member being used to return said pen refill upward;when said snap-on protruding strips snap onto said positioning ratchet wheels, said pen tip extends through said outlet and inlet port, when said snap-on protruding strips snap onto said positioning grooves, said pen tip retracts into said mounting cavity. ;

[0008] In one embodiment, a force surface is provided at the side of said portion driven away from said handle, said force surface comprising a vertical surface and an extension surface hinged with each other, said vertical surface extends along a vertical direction, said extension surface is located below said vertical surface, and said extension surface is oriented downward along the vertical direction while gradually moving away from said handle along a horizontal direction, a convex band is provided projecting on said extension surface.

[0009] In one embodiment, a detachable portion is removably provided at the upper end of said handle, said detachable portion is used for mutual disassembly with said handle in order to open said side wall notch.

[0010] In one embodiment, said sidewall notch comprises a lower segment body located on said handle and an upper segment body located on said detachable portion.

[0011] In one embodiment, a clip is provided on the outer periphery of said detachable portion, said clip and said driven portion are placed in an adjacent position.

[0012] In one embodiment, said erase block is provided with a nesting portion, said detachable portion is provided with a nesting hole corresponding to said nesting portion, said nesting portion is nested in said nesting hole to enable said erase block and said detachable portion to be mounted on each other, said nesting portion is provided with a limiting slot on the outer periphery, said nesting hole is provided with a limiting block on the inner peripheral wall, said limiting slot and said limiting block cooperate with each other to limit the circumferential rotation of said erase block relative to said detachable portion.

[0013] In one embodiment, said nesting portion is provided with a hook portion on the outer periphery, said hook portion is disposed at the side of said nesting hole opposite said erase block to limit upward movement of said erase block.

[0014] In one embodiment, the lower end of said erase block is symmetrically provided with turn-stop surfaces, each of said turn-stop surfaces is inclined in a horizontal direction opposite to each other and in a vertical direction downward, and said detachable portion is provided with a surface for engaging each of said turn-stop surfaces.

[0015] In one embodiment, a clip is provided at the periphery of the upper end of said handle, said clip and said driven portion are provided adjacent to each other.

[0016] By adopting the above technical solution: 1. The content written by the thermosensitive ink can be erased by said erasing block. 2. Said erasing block is located at the upper end of said handle, and said driving member is located on the side wall of said handle, so that said erasing block and said driving member do not interfere with each other in the structural position, therefore, said erasing block is directly placed on said handle, and when holding said handle and using said erasing block to erase the written content, the force acting on said erasing block is directly carried by said handle, so that the interaction between said handle, said erasing block and the erasing plane is more stable, so as to optimize the erasing effect.Accordingly, said drive member and said corresponding refill control assembly are not hindered by said erase block to avoid inefficient work, and play a protective role for said drive member and said refill control assembly. 3. Said drive member adopts said driven portion located on the outer side of said handle to slide vertically downward, and then acts on said refill control assembly via said drive portion in said mounting cavity, so that said refill control assembly is driven to control the extension or retraction of said pen refill. Brief description of the drawings

[0017] [Fig.l] represents an assembly diagram of embodiment 1;

[0018] [Fig.2] represents an exploded view of the first embodiment 1;

[0019] [Fig.3] represents a sectional view of the first embodiment 1;

[0020] [Fig.4] represents a partially enlarged view of [Fig.3];

[0021] [Fig.5] represents a sectional view of said handle in the first embodiment lization 1;

[0022] [Fig.6] represents a part view of said drive element according to the first embodiment 1;

[0023] [Fig.7] represents a part view of said rotating component and said ratchet wheel element in the first embodiment 1;

[0024] [Fig.8] represents a partial view of the structure of said detachable part in the first embodiment 1;

[0025] [Fig.9] shows a part view of said erase block in the first embodiment 1.

[0026] Reference figures: 1. sleeve;

[0027] 11. mounting cavity; 12. outlet and inlet port; 13. side wall notch; 14. Positioning ratchet wheel; 15. Positioning groove;

[0028] 131. lower segment body; 132. upper segment body;

[0029] 141. ratchet tooth; 142. tooth groove; 143. vertical groove;

[0030] 2. erase block;

[0031] 21. nesting part; 22. limiting slot; 23. hook part; 24. surface stop-turn;

[0032] 3. pen refill;

[0033] 31. pen tip;

[0034] 4. drive element;

[0035] 41. driven part; 42, driving part; 43. force surface;

[0036] 431. vertical surface; 432. extension surface; 433. convex band;

[0037] 5. recharging control assembly;

[0038] 51. rotating component; 52, ratchet wheel element; 53, return element;

[0039] 511. snap-on protruding strip; 521. cam plate; 522, wheel protrusion pawl;

[0040] 6. detachable part;

[0041] 61. nesting hole; 62. limiting block; 63, cooperation surface;

[0042] 7. clip.

[0043] Detailed description of particular embodiments

[0044] In order to enable those skilled in the art to better understand the present invention, certain specific embodiments are described in detail below.

[0045] Embodiment 1:

[0046] As shown in Figures 1-9, a sliding sidewall ballpoint pen with an eraser block, comprising:

[0047] A handle 1, the length direction of said handle 1 is vertical, a mounting cavity 11 is provided in said handle 1, an outlet and inlet port 12 penetrated downwardly by said mounting cavity 11 being provided at the lower end of said handle 1, and further, the side wall of said handle 1 is provided with a side wall notch 13 which is in communication with said mounting cavity 11, and said side wall notch 13 is provided in an extension direction along the length direction of said handle 1.

[0048] An erasing block 2, said friction block 2 is provided at the upper end of said handle 1.

[0049] A pen refill 3, said pen refill 3 is slidably mounted inside said handle 1, and a pen tip 31 is provided at the lower end of said pen tip 3, further, said pen refill 3 is used for containing thermosensitive ink.

[0050] A drive element 4, said drive element 4 being slidably mounted in said side wall notch 13, said element drive 4 being provided with a driven portion 41 located outside the side wall of said handle 1, said drive element 4 being provided with a driving portion 42 located inside said mounting cavity 11.

[0051] A refill control assembly 5, said refill control assembly 5 being provided inside said mounting cavity 11, and said refill control assembly 5 being used to be driven by said driving portion 42 to control said pen tip 31 to extend through said outlet and inlet port 12 or to retract into said mounting cavity 11 or to maintain said pen tip 31 in an extended state.

[0052] Therefore, 1. The content written by the thermosensitive ink can be erased by said erasing block 2. 2. Said erasing block 2 is located at the upper end of said handle 1, and said driving member 4 is located on the side wall of said handle 1, so that said erasing block 2 and said driving member 4 do not interfere with each other in the structural position, therefore, said erasing block 2 is directly placed on said handle 1, and when holding said handle 1 and using said erasing block 2 to erase the written content, the force acting on said erasing block 2 is directly carried by said handle 1, so that the interaction between said handle 1, said erasing block 2 and the erasing plane is more stable, so as to optimize the erasing effect.Accordingly, said drive member 4 and said corresponding refill control assembly 5 are not hindered by said erase block 2 to avoid inefficient work, and play a protective role for said drive member 4 and said refill control assembly 5. 3. Said drive member 4 adopts said driven portion 41 located on the outer side of said handle 1 to slide vertically downward, and then acts on said refill control assembly 5 via said drive portion 42 in said mounting cavity 11, so that said refill control assembly 5 is driven to control and maintain the extension or retraction of said refill 3.

[0053] Wherein, 3 positioning ratchet wheels 14 arranged at a circumferential spacing and positioning grooves 15 between said positioning ratchet wheels 14 adjacent to the inner peripheral wall of said mounting cavity 11 according to the present embodiment; in particular, said positioning ratchet wheels 14 are integrally formed with the inner peripheral wall of said mounting cavity 11, said positioning grooves 15 are provided extending vertically and open at the lower end, and 2 ratchet teeth 141 adjacent to each other are provided at the lower end of each positioning ratchet wheel 14, tooth grooves 142 in V-shaped rows are formed between said 2 ratchet teeth 141.

[0054] Correspondingly, said recharging control assembly 5 comprising:

[0055] a rotating component 51, 3 snap-on protruding strips 511 are provided arranged at an equal spacing on the outer periphery of said rotating component 51, said 3 snap-on protruding strips 511 can snap at the same time into said 3 tooth grooves 142 or into said 3 positioning grooves 15.

[0056] ratchet wheel members 52, 3 cam plates 521 are provided at the outer peripheral wall of said ratchet wheel members 52, 3 vertical grooves 143 are provided corresponding to the inner peripheral wall of said mounting cavity 11, so that each of said 3 cam plates snaps to said vertical groove 143 to enable said ratchet wheel members 52 to be installed in said mounting cavity 11 in a vertically sliding manner, and further, the upper end of said ratchet wheel members 52 is fixedly mounted in said drive portion 42 by means of a snap-fit ​​method to enable said ratchet wheel members 52 to slide downward upon the downward movement of said drive portion 42. Furthermore, 6 ratchet wheel projections 522 are provided in the circumferential direction at the upper end of said ratchet wheel elements 52.

[0057] A return member 53, in particular, it is possible to adopt a compression spring, the lower end of said return member 53 is abutted against said handle 1 and the upper end of said return member 53 is abutted against said pen refill 3, so that said return member 53 applies an upward driving force to said pen refill 3 to return said pen refill 3 upward.

[0058] Therefore, by adjusting the relative positions of said ratchet wheel projections 522 and said ratchet teeth 141, when said pen tip 31 is located in said mounting cavity 11, said ratchet protruding strip 511 is located in said positioning groove 15, so that when said driving member 4 is driven downward, said ratchet wheel projections 522 on said ratchet wheel member 52 act on said ratchet protruding strip 511, so that said ratchet protruding strip 511 moves downward to exit said positioning groove 15, and said ratchet protruding strip 511 comes into contact with a central portion of the beveled surface of said ratchet wheel projections 522, so that, after lost the circumferential restriction of said positioning groove 15,said ratchet protruding strip 511 rotates along the beveled surface of said ratchet wheel protrusion 522 so as to be misaligned with said positioning groove 15, and aligned under said adjacent tooth groove 142, so that after releasing said drive member 4, under the action of said return member 53, said ratchet protruding strip 511 moves towards , the top and attaches to a side surface of said tooth groove 142 and rotates along the side surface once more to the highest position of said tooth groove 142. At this time, said pen tip 31 exits said exit and entry port 12, and said ratchet protruding strip 511 moves away from said current ratchet wheel protrusion 522 and moves to said next ratchet wheel protrusion 522, after which, in the same manner, when said driving member 4 is driven downward, said ratchet wheel protrusions 522 on said ratchet wheel member 52 act on said ratchet protruding strip 511, so that said ratchet protruding strip 511 moves downward to exit said tooth groove 142, and said ratchet protruding strip ratchet projection 511 contacts a central portion of the beveled surface of said ratchet wheel projections 522, so that,after losing the circumferential restriction of said tooth groove 142, said ratchet protruding strip 511 rotates along the beveled surface of said ratchet wheel protrusion 522 so as to be misaligned with said tooth groove 142, and aligned under the beveled surface of said ratchet tooth 141 opposite said tooth groove 142, so that after releasing said driving member 4, under the action of said biasing member 53, said ratchet protruding strip 511 moves upward and attaches to the beveled surface of said ratchet tooth 141 opposite said tooth groove 142 and rotates along the beveled surface once more into said next positioning groove 15 and slides upward to the high position, at which at which point said pen tip 31 retracts into said mounting cavity 11,and said ratchet protruding band 511 moves away from said current ratchet wheel protrusion 522 and moves to said next ratchet wheel protrusion 522.,

[0059] Preferably, a force surface 43 is provided at the side of said driven portion 41 opposite said handle 1 according to the present embodiment, said force surface 43 comprising a vertical surface 431 and an extension surface 432 hinged with each other, said vertical surface 431 and said extension surface 432 may be planar or curved, said vertical surface 431 extends along a vertical direction, said extension surface 432 is located below said vertical surface 431, and said extension surface 432 is oriented downward along the vertical direction while gradually moving away from said handle 1 along a horizontal direction, furthermore, a convex strip 433 is provided projecting on said extension surface 432.

[0060] Thus, said vertical surface 431 is provided extending vertically corresponding to the length direction of said handle 1 in order to ensure that said drive member 4 fits closer to said handle 1 in case of a sufficiently large action surface, so that said drive member 4 is less likely to be subjected to a vertical force which causes the extension or retraction by mistake of said pen tip 31, and the adjustment of said extension surface 432 makes it possible to better prevent the finger from slipping and facilitate training when the finger is pressed against said vertical surface 431 to control said driving member 4 from orienting downwards. The provision of said convex strip 433 further increases the friction force on said extension surface 432 in order to improve the smoothness of training.

[0061] Furthermore, according to the present embodiment, a detachable part 6 is provided in a detachable manner at the upper end of said handle 1, said erase block 2 is provided on said detachable part 6, said detachable part 6 is used for mutual disassembly with said handle 1 to open said side wall notch 13, so that it is possible to open said side wall notch 13 by disassembling said detachable part 6, to realize the disassembly and assembly of said drive member 4, and after the assembly, it is necessary to realize the assembly of said detachable part 6, to ensure stable cooperation between said drive member 4 and said side wall notch 13, to prevent the exit of said drive member 4.

[0062] More specifically, the upper end of said mounting cavity 11 is open, and said detachable part 6 is inserted into said handle 1 and is fixed therein by the snap-fastening.

[0063] Furthermore, according to the present embodiment, said side wall notch 13 comprises a lower segment body 131 located on said handle 1 and an upper segment body 132 located on said detachable portion 6, so that the circumferential restriction of said handle 1 and said detachable portion can be achieved by said driving member 4 placed in both said lower segment body 131 and said upper segment body 132 in order to prevent said erasure block 2 from being deflected when erasing the contents of writing due to the circumferential rotation of said detachable portion relative to said handle 1, which affects the erasing effect.

[0064] Furthermore, according to the present embodiment, a clip 7 is provided at the periphery of said detachable part 6, for example made in one piece, and said clip 7 and said driven part 41 are provided adjacent to each other, so that said protruding clip 7 is located on an adjacent side of said driven part 41 while realizing blocking to a certain extent of the space on the side of said driven part 41 against said clip 7 without obstructing the sliding of said driven part 41, so as to reduce the probability of said driven part 41 being touched by mistake.

[0065] Furthermore, according to the present embodiment, said erasure block 2 is provided at its lower end with a nesting portion 21, said detachable portion 6 is provided with a nesting hole 61 corresponding to said nesting portion 21, said nesting portion 21 is nested in said nesting hole 61 to allow said erase block 2 and said detachable portion 6 to be mounted to each other.

[0066] Furthermore, said nesting portion 21 is provided with 2 limiting slots 22 on the outer periphery, said nesting hole 61 is provided with 2 limiting blocks 62 on the inner peripheral wall, said limiting slot 22 and said limiting block 62 cooperate with each other to limit the circumferential rotation of said erasing block 2 relative to said detachable portion 6, in order to limit the circumferential rotation of said erasing block 2 relative to said nesting portion 21, to further improve the stability of said erasing block 2 and have a better erasing effect.

[0067] Furthermore, according to the present embodiment, said nesting portion 21 is provided with a plurality of integral hook portions 23 on the outer periphery of the lower end, each of said hook portions 23 is arranged at the side of said nesting hole 61 opposite said erase block 2 to limit the upward movement of said erase block 2, in order to improve the stability of mounting said erase block 2 to said detachable portion 6 and to have a better erasing effect.

[0068] Furthermore, according to the present embodiment, the lower end of said erase block 2 is symmetrically provided with the turn-stop surfaces 24, said turn-stop surfaces 24 are preferably curved, each of said turn-stop surfaces 24 is inclined in a horizontal direction opposite to each other and in a vertical direction downward, and said detachable part 6 is provided with a cooperation surface 63 at each of said turn-stop surfaces 24, so that upon interaction between said turn-stop surfaces 24 and said cooperation surface 63, the action of limiting the circumferential rotation of said erase block 2 with respect to said detachable part 6 is improved, in order to improve the stability of said erase block 2 and have a better erasing effect.

[0069] Embodiment 2:

[0070] A sliding sidewall ballpoint pen with an erasing block, the main structure of which is identical to that of the first embodiment, what is different is that said handle 1 and said clip 7 are provided to be made in one piece.

Claims

Claims

1. A sliding sidewall ballpoint pen with an erasing block, characterized in that it comprises: a handle (1), in which a mounting cavity (11) is provided, an outlet and inlet port (12) in communication with said mounting cavity (11) being provided at the lower end of said handle (1), a side wall notch (13) in communication with said mounting cavity (11) being provided on the side wall of said handle (1), and said side wall notch (13) being provided extending along the length direction of said handle (1); an erase block (2), said erase block (2) being provided at the upper end of said handle (1); a pen refill (3), said pen refill (3) being slidably mounted inside said handle (1), and a pen tip (31) being provided at the lower end of said pen refill (3); a drive member (4), said drive member (4) being slidably mounted in said side wall notch (13), said drive member (4) being provided with a driven portion (41) located outside the side wall of said handle (1), said drive member (4) being provided with a driving portion (42) located inside said mounting cavity (11); and a refill control assembly (5), said refill control assembly (5) being provided inside said mounting cavity (11), and said refill control assembly (5) being used to be driven by said driving portion (42) to control said pen tip (31) to extend through said outlet and inlet port (12) or to retract into said mounting cavity (11).

2. A sliding sidewall ballpoint pen with an eraser block according to claim 1, characterized in that it further comprises: a plurality of positioning ratchet wheels (14) arranged at equal circumferential spacing and positioning grooves (15) between said positioning ratchet wheels (14) adjacent the inner peripheral wall of said mounting cavity (11); said recharging control assembly (5) comprising: a rotating component (51), on which one or a plurality of snap-on protruding strips (511) are provided for snap-engaging onto said positioning ratchet wheels (14) or said positioning grooves operation (15); ratchet wheel members (52), said ratchet wheel member (52) being slidably installed inside said mounting cavity (11), said ratchet wheel member (52) being used to slide downward under the action of said driving portion (42), a plurality of ratchet wheel projections (522) being provided in a circumferential direction on said ratchet wheel members (52), said ratchet wheel projections (522) being used to drive the circumferential rotation of said ratchet protruding strips (511); a return member (53), said return member (53) being used to return said pen refill (3) upward;when said snap-on protruding strips (511) snap onto said positioning ratchet wheels (14), said pen tip (31) extends through said outlet and inlet port (12), when said snap-on protruding strips (511) snap onto said positioning grooves (15), said pen tip (31) retracts into said mounting cavity (11).;

3. A sliding sidewall ballpoint pen with an eraser block according to claim 1, characterized in that: a force surface (43) is provided at the side of said driven portion (41) away from said handle (1), said force surface (43) comprising a vertical surface (431) and an extension surface (432) hinged with each other, said vertical surface (431) extends along a vertical direction, said extension surface (432) is located below said vertical surface (431), and said extension surface (432) faces downward along the vertical direction while gradually moving away from said handle (1) along a horizontal direction, a convex strip (433) is provided projecting on said extension surface (432).

4. A sliding sidewall ballpoint pen with an erasing block according to claim 3, characterized in that: a detachable portion (6) is removably provided at the upper end of said handle (1), said detachable portion (6) is used for mutual disassembly with said handle (1) to open said sidewall notch (13).

5. A sliding sidewall ballpoint pen with an eraser block according to claim 4, characterized in that: said sidewall notch (13) comprises a lower segment body (131) located on said handle (1) and an upper segment body (132) located on said detachable portion (6).

6. A sliding sidewall ballpoint pen with an erasing block according to claim 5, characterized in that: a clip (7) is provided on the outer periphery of said detachable portion (6), said clip (7) and said driven portion (41) are placed in an adjacent position.

7. A sliding sidewall ballpoint pen with an eraser block according to claim 5, characterized in that: said eraser block (2) is provided with a fitting portion (21), said detachable portion (6) is provided with a fitting hole (61) corresponding to said fitting portion (21), said fitting portion (21) is fitted into said fitting hole (61) to enable said eraser block (2) and said detachable portion (6) to be mounted on each other, said fitting portion (21) is provided with a limiting slot (22) on the outer periphery, said fitting hole (61) is provided with a limiting block (62) on the inner peripheral wall, said limiting slot (22) and said limiting block (62) cooperate with each other the other to limit the circumferential rotation of said erasure block (2) relative to said detachable part (6).

8. A sliding sidewall ballpoint pen with an eraser block according to claim 7, characterized in that: said nesting portion (21) is provided with a hook portion on the outer periphery, said hook portion (23) is disposed at the side of said nesting hole (61) opposite said eraser block (2) to limit the upward movement of said eraser block (2).

9. A sliding sidewall ballpoint pen with an eraser block according to claim 8, characterized in that: the lower end of said eraser block (2) is symmetrically provided with turn-stop surfaces (24), each of said turn-stop surfaces (24) is inclined in a horizontal direction away from each other and in a vertical direction downward, and said detachable part (6) is provided with a cooperating surface (63) at each of said turn-stop surfaces (24).

10. A sliding sidewall ballpoint pen with an eraser block according to claim 3, characterized in that: a clip (7) is provided at the periphery of the upper end of said handle (1), said clip (7) and said driven portion (41) are provided adjacent to each other.

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