Multi-refill pen

Abstract

The utility model relates to a multi-refill pen which comprises a pen point, at least two refills, a spring and a guide seat, and further comprises a pen holder, and a rotating column, a plurality of guide grooves and limiting blocks arranged in the guide grooves are arranged at the top of the pen holder; the push rod is movably arranged in the guide groove and connected with the refill, a positioning block is arranged at the top of the push rod, and the positioning block and the limiting block are oppositely arranged; the top cover is rotationally arranged on the rotating column and is provided with a taking-out groove; the spring is positioned between the guide seat and the push rod; in a free state, the taking-out groove and the guide groove are staggered, and the positioning block movably abuts against the limiting block; when the refill is replaced, the taking-out groove is communicated with the guide groove, the positioning block is separated from the limiting block, and the push rod is taken out through the taking-out groove. According to the multi-refill pen, the push rod is taken out by rotating the top cover to enable the guide groove to be communicated with the taking-out groove, locking of the push rod in the free state is achieved through the limiting block and the positioning block, the refills are convenient to replace, and the top cover does not need to be detached and is not prone to being lost.

Description

Technical Field

[0001] This utility model relates to a pen, and more particularly to a multi-core pen. Background Technology

[0002] Replacing the refill in a multi-refill pen typically requires removing the tip, pulling out the refill, and inserting the new refill into the push rod. Because multi-refill pens also have internal guide seats with guide holes corresponding to the number of refills, inserting the refill requires aligning it with the guide holes and inserting the top of the refill onto the connecting rod on the push rod, making the operation difficult and refill replacement inconvenient. To solve these problems, some pens remove the push rod from the top, taking out the push rod and refill as a whole, and then replacing the refill, such as the screw-cap three-color pen disclosed in Chinese patent CN220349385U. In this pen, the push rod and refill are removed from the top of the pen barrel. However, this screw-cap three-color pen requires removing the back cover when replacing the refill, replacing the refill, and then reinstalling the back cover. This method is prone to losing the back cover and is also quite cumbersome to disassemble and reassemble. Utility Model Content

[0003] To solve the above problems, this utility model provides a multi-lead pen, the specific technical solution of which is as follows:

[0004] A multi-refill pen includes a pen tip, at least two refills, a spring, and a guide seat. It also includes: a pen barrel with a rotating post, several guide grooves, and a limiting block within each guide groove; a push rod movably disposed within the guide grooves and connected to each refill, with a positioning block at its top, the positioning block being opposite to the limiting block; and a top cover rotatably mounted on the rotating post and having a removal slot. The pen tip is connected to the pen barrel, and the spring is located between the guide seat and the push rod. In a free state, the removal slot and the guide grooves are staggered, and the positioning block movably abuts against the limiting block. When changing refills, the removal slot communicates with the guide grooves, the positioning block separates from the limiting block, and the push rod is removed through the removal slot.

[0005] Preferably, the limiting block is provided with a limiting inclined surface, and the positioning block is provided with a positioning inclined surface. The positioning inclined surface matches the limiting inclined surface so that the limiting block and the positioning block are inserted together.

[0006] Preferably, the rotating column is provided with a rotating hole, and the top cover is provided with a connecting column, which is rotatably disposed within the rotating hole.

[0007] Furthermore, an anti-detachment block is provided inside the rotating hole, and an anti-detachment groove is provided on the connecting column, with the anti-detachment groove movably inserted into the anti-detachment block.

[0008] Preferably, the rotating column is provided with a plurality of positioning slots in a circular array, and the top cover is provided with a plurality of positioning posts in a circular array. The positioning posts are movably inserted into the positioning slots so that the extraction slot remains in a communicating state or an interleaved state with the guide slot.

[0009] Furthermore, the positioning slots and the positioning posts are arranged in a circular array of eight.

[0010] Preferably, the top cover is also provided with a rotating boss.

[0011] Preferably, the limiting blocks are symmetrically arranged on both sides of the guide groove, and the positioning blocks are symmetrically arranged on both sides of the push rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model provides a multi-refill pen where the push rod can be removed by rotating the top cover to connect the guide groove and the extraction groove. The push rod is locked in the free state by the limit block and the positioning block, which makes it convenient to replace the pen refill and the top cover does not need to be removed, so it is not easy to lose. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this application;

[0015] Figure 2 This is a cross-sectional view of this application;

[0016] Figure 3 This is a schematic diagram showing the connection between the guide groove and the extraction groove in this application;

[0017] Figure 4 This is a magnified view of a section after the top cover has been hidden;

[0018] Figure 5 This is a magnified view of a portion of the top of the pen barrel;

[0019] Figure 6 It is a cross-sectional view of the pen barrel;

[0020] Figure 7 This is a schematic diagram of the push rod structure;

[0021] Figure 8 yes Figure 7 A magnified view of a section at point I;

[0022] Figure 9 This is a three-dimensional view of the top cover from the first perspective;

[0023] Figure 10 This is a two-dimensional view of the top cover from a second perspective;

[0024] Figure 11 This is a cross-sectional view of the top cover. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings.

[0026] like Figures 1 to 11 As shown, a multi-refill pen includes a pen tip 1, a pen refill, a spring, a guide seat 2, a pen barrel 3, a push rod 4, and a top cover 5. The pen refill is connected to the pen barrel 3. The top of the pen barrel 3 is provided with a rotating post 31, a guide groove 32, and a limiting block 33. The guide grooves 32 are arranged in a circular array, and two, three, or four can be provided. The top of the guide grooves 32 is provided with a limiting block 33. The push rod 4 is movably inserted into the guide groove 32, and the bottom of the push rod 4 is connected to the pen refill. The spring is located between the guide seat 2 and the push rod 4 and is movably inserted into the pen barrel 5. On the refill, the pen refill is movably inserted into the guide hole of the guide seat 2; the top of the push rod 4 is provided with a positioning block 41, which is opposite to the limiting block 33; the top cover 5 is rotatably mounted on the rotating column 31, and the top cover 5 is provided with a take-out groove 51; in the free state, the take-out groove 51 and the guide groove 32 are staggered, and the positioning block 41 is movably pressed against the limiting block 33; when changing the pen refill, the take-out groove 51 communicates with the guide groove 32, the positioning block 41 separates from the limiting block 33, and the push rod 4 is taken out through the take-out groove 51.

[0027] The pen refill, spring, and push rod 4 are in one-to-one correspondence, and the guide groove 32 is in one-to-one correspondence with the push rod 4.

[0028] The push rod 4 is an existing mature product. When writing, push the push rod 4 towards the pen tip 1. The push rod 4 causes the top of the pen refill to extend from the pen tip 1 and lock in position.

[0029] In the free state, that is, when the push rod 4 is in the writing state or the retracted state, the take-out groove 51 and the guide groove 32 on the top cover 5 are staggered to prevent the push rod 4 from automatically popping out of the take-out groove 51 when the limit block 33 and the positioning block 41 fail to connect.

[0030] When the pen refill needs to be replaced, rotate the top cover 5 to connect the take-out slot 51 with the guide slot 32. Then, the push rod 4 is taken out of the take-out slot 51. When taking out the push rod 4, you can pull the push rod 4 outward to separate the positioning block 41 from the limiting block 33, or push another push rod 4 that is set opposite to it to separate the positioning block 41 from the limiting block 33. Then, under the action of the spring, the push rod 4 pops out of the take-out slot 51, making it very convenient to take out the push rod 4. Furthermore, it can effectively prevent the push rod 4 from popping out of the guide slot 32 when the pen refill is not being replaced, thus improving reliability.

[0031] To further improve the reliability of the push rod 4 in preventing it from detaching, the limiting block 33 is provided with a limiting inclined surface 34, and the positioning block 41 is provided with a positioning inclined surface 42. The positioning inclined surface 42 matches the limiting inclined surface 34 so that the limiting block 33 and the positioning block 41 are inserted together. After the two inclined surfaces are engaged, it can prevent the push rod 4 from automatically sliding relative to the limiting block 33 and the positioning block 41 under the action of external force. Instead, it needs to overcome the spring force and move downward first, so that the limiting inclined surface 34 and the positioning inclined surface 42 can separate before the limiting block 33 and the positioning block 41 can separate, thereby effectively preventing the push rod 4 from automatically popping out.

[0032] Limiting blocks 33 are symmetrically arranged on both sides of the guide groove 32, and positioning blocks 41 are symmetrically arranged on both sides of the push rod 4. The symmetrical arrangement of the limiting blocks 33 and positioning blocks 41 ensures uniform force distribution, reduces the risk of damage, and improves service life.

[0033] To facilitate the installation of the top cover 5, the rotating column 31 is provided with a rotating hole 35, and the top cover 5 is provided with a connecting column 52, which is rotatably positioned within the rotating hole 35. To prevent the top cover 5 from falling off and to improve the reliability of the connection between the top cover 5 and the rotating column 31, an anti-detachment block 36 is provided within the rotating hole 35, and an anti-detachment groove 53 is provided on the connecting column 52, which is movably inserted into the anti-detachment block 36.

[0034] To prevent the top cover 5 from rotating freely and to facilitate positioning, the rotating column 31 is provided with a ring array of positioning slots 37, and the top cover 5 is provided with a ring array of positioning posts 54. The positioning posts 54 are movably inserted into the positioning slots 37, so that the extraction slot 51 remains in a communication state or an interleaved state with the guide slot 32. There can be eight positioning posts 54 and eight positioning slots 37, so that each rotation is 45°, and each rotation can make the guide slot 32 communicate with the extraction slot 51 or close the guide slot 32 with the top cover 5.

[0035] To facilitate the rotation of the top cover 5, a rotating boss 55 is provided on the top cover 5. The rotating boss 55 is arranged along the axial direction of the top cover 5 to increase the friction between the fingers and prevent slippage, making it more convenient and effortless to rotate the top cover 5.

[0036] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A multi-refill pen, comprising a pen tip (1), at least two refills, a spring, and a guide seat (2), characterized in that, Also includes: The pen barrel (3) has a rotating column (31), several guide grooves (32) and a limiting block (33) in the guide grooves (32) at its top. A push rod (4) is movably disposed within the guide groove (32) and connected to the pen refill. A positioning block (41) is provided at the top of the push rod (4), and the positioning block (41) is disposed opposite to the limiting block (33). The top cover (5) is rotatably mounted on the rotating column (31) and is provided with a take-out groove (51). The pen tip (1) is connected to the pen barrel (3), and the spring is located between the guide seat (2) and the push rod (4). In the free state, the extraction slot (51) and the guide slot (32) are staggered, and the positioning block (41) moves against the limiting block (33); When changing the pen refill, the take-out groove (51) is connected to the guide groove (32), the positioning block (41) is separated from the limiting block (33), and the push rod (4) is taken out through the take-out groove (51).

2. A multi-lead pen according to claim 1, characterized in that, The limiting block (33) is provided with a limiting inclined surface (34), and the positioning block (41) is provided with a positioning inclined surface (42). The positioning inclined surface (42) matches the limiting inclined surface (34) so ​​that the limiting block (33) and the positioning block (41) are inserted together.

3. A multi-lead pen according to claim 1, characterized in that, The rotating column (31) is provided with a rotating hole (35), and the top cover (5) is provided with a connecting column (52), which is rotatably disposed in the rotating hole (35).

4. A multi-lead pen according to claim 3, characterized in that, The rotating hole (35) is provided with an anti-detachment block (36), and the connecting column (52) is provided with an anti-detachment groove (53), which is movably inserted into the anti-detachment block (36).

5. A multi-lead pen according to claim 1, characterized in that, The rotating column (31) is provided with a number of positioning grooves (37) in an annular array, and the top cover (5) is provided with a number of positioning columns (54) in an annular array. The positioning columns (54) are movably inserted into the positioning grooves (37) so that the take-out groove (51) is kept in a communicating state or an intersecting state with the guide groove (32).

6. A multi-lead pen according to claim 5, characterized in that, The positioning groove (37) and the positioning post (54) are both arranged in a circular array of eight.

7. A multi-lead pen according to claim 1, characterized in that, The top cover (5) is also provided with a rotating boss (55).

8. A multi-lead pen according to claim 1, characterized in that, The limiting block (33) is symmetrically arranged on both sides of the guide groove (32), and the positioning block (41) is symmetrically arranged on both sides of the push rod (4).

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