Refill locking device of automatic pressing pen

Abstract

The utility model belongs to the technical field of pressing pens, in particular to a refill locking device of an automatic pressing pen, which comprises a penholder, a refill, a nib and a pressing cap, the refill is provided with an inclined plane, and the refill locking device further comprises a locking mechanism, a mounting plate; the second limiting ring is fixed to the locking pin. The first limiting ring is fixed to the second limiting ring. A reset spring; the limiting sleeve is mounted outside the pen point in a thread screwing manner; according to the utility model, the limiting sleeve is twisted to extrude the inclined surface of the locking pin, at the moment, the locking pin moves towards the inner side of the pen point and compresses and locks the refill, and at the moment, the pressing cap cannot be pressed, so that the refill is prevented from extending out of or retracting into the pen point due to misoperation, and the use experience is improved; particularly, the problem that the pen point is damaged due to the fact that the refill accidentally extends out of the pen point in the carrying process is solved, and the carrying safety of the pressing pen is improved.

Description

Technical Field

[0001] This utility model belongs to the field of press pen technology, specifically relating to a refill locking device for an automatic press pen. Background Technology

[0002] A push-button pen is a type of pen tool with a push-button design. It is a type of pen used for everyday writing. The pen tip can be extended or retracted by pressing the end of the pen or the barrel, without the need for a pen cap.

[0003] Existing push-button pens typically extend and retract the pen tip by pressing the top and bottom of the clip, achieving the effect of switching pen states along the radial direction of the pen body.

[0004] For example, in the prior art, Chinese utility model patent with authorization announcement number CN222495907U discloses "a pen clip press pen", which includes: a pen body, in which a pen core is slidably disposed, and a spring is provided between the two for applying a force to the pen core extending into the pen body cavity, the two ends of the spring respectively abutting against the pen body and the pen core; a pen clip, the two ends of which are hinged to the side of the pen body, and when the pen clip rotates vertically relative to the pen body, the pen clip drives the pen core to extend out or extend into the pen body through a telescopic locking mechanism.

[0005] While existing push-button pens, including those mentioned above, can meet general usage requirements, they generally lack a cap. Therefore, during carrying or use, it is easy to accidentally touch the cap at the top of the pen, causing the pen tip to extend or retract into the pen body unintentionally, affecting the user experience. If the pen tip extends out of the pen body unintentionally during carrying, it can also easily damage the pen tip.

[0006] To solve the above problems, this utility model proposes an automatic press pen refill locking device. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, this utility model provides an automatic press-pen refill locking device, which is convenient to use and has high safety performance.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an automatic press-type pen refill locking device, comprising a pen barrel, a pen refill disposed within the pen barrel, a pen tip disposed at the tail end of the pen barrel via a threaded engagement, and a pressing cap disposed at the head end of the pen barrel. Pressing the pressing cap causes the pen tip of the pen refill to extend or retract from the pen tip. The pen refill has an inclined surface. The device also includes a locking mechanism, wherein the locking mechanism comprises:

[0009] A locking pin is provided, which faces the inclined surface. A through hole is machined on the pen tip for the locking pin to pass through, and the protruding end face of the locking pin is an inclined surface.

[0010] Mounting plate, which is fixed to the inner wall of the pen tip by a fixing rod, and the locking pin passes through the mounting plate;

[0011] The second limiting ring is fixed to the locking pin;

[0012] A return spring, which is sleeved on the locking pin and located between the mounting plate and the second limiting ring;

[0013] A limiting sleeve is installed on the outside of the pen tip by means of threaded engagement.

[0014] As a preferred embodiment of this utility model, the locking mechanism is provided in multiple sets at equal intervals along the circumferential direction.

[0015] As a preferred embodiment of this utility model, the mounting plate is fixed to the inner wall of the pen tip using four diagonally distributed fixing rods.

[0016] In a preferred embodiment of this invention, the outer wall of the locking pin abuts against the inner wall of the through hole.

[0017] In a preferred embodiment of this utility model, the locking pin is a square rod-shaped structure and the through hole is a square hole.

[0018] As a preferred technical solution of this utility model, it also includes:

[0019] A first limiting ring, two first limiting rings are fixed at intervals on the pen tip, and the limiting sleeve is located between the two first limiting rings.

[0020] As a preferred embodiment of this utility model, the outer diameter of the first limiting ring is equal to the outer diameter of the limiting sleeve.

[0021] As a preferred embodiment of this utility model, anti-slip grooves are evenly distributed on the outer wall of the limiting sleeve.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] In this invention, by twisting the limiting sleeve, the limiting sleeve presses against the inclined surface of the locking pin. At this time, the locking pin moves toward the inside of the pen tip and presses the pen refill, locking the pen refill. The press cap cannot be pressed at this time, which avoids the pen refill extending or retracting into the pen tip due to accidental operation, thus improving the user experience. In particular, it avoids the problem of the pen tip being easily damaged by the pen refill accidentally extending out of the pen tip during carrying, and improves the safety of carrying the press pen.

[0024] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the pen tip in this utility model;

[0028] Figure 3 This utility model Figure 2 A magnified schematic diagram of the locking mechanism in the diagram;

[0029] Figure 4 This is a schematic diagram of the isometric structure of the pen tip in this utility model.

[0030] In the diagram: 1. Pen barrel; 2. Pen refill; 21. Bevel; 3. Pen tip; 31. Through hole; 32. First limiting ring; 4. Press cap; 5. Locking mechanism; 51. Locking pin; 52. Mounting plate; 53. Fixing rod; 54. Second limiting ring; 55. Return spring; 56. Limiting sleeve; 561. Anti-slip groove. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-4 The present invention provides the following technical solution: an automatic press pen refill locking device, including a pen barrel 1, a pen refill 2 disposed in the pen barrel 1, a pen tip 3 disposed at the tail end of the pen barrel 1 by means of threaded engagement, and a pressing cap 4 disposed at the head end of the pen barrel 1. The pen tip of the pen refill 2 is extended or retracted into the pen tip 3 by pressing the pressing cap 4. The pen refill 2 has an inclined surface 21. The device also includes a locking mechanism 5, wherein the locking mechanism 5 includes: a locking pin 51, a mounting plate 52, a second limiting ring 54, a return spring 55, and a limiting sleeve 56.

[0033] Furthermore, by Figures 1-3As shown, in this embodiment, the locking pin 51 faces the inclined surface 21. A through hole 31 is machined on the pen tip 3 for the locking pin 51 to pass through, and the protruding end face of the locking pin 51 is inclined. The mounting plate 52 is fixed to the inner wall of the pen tip 3 by the fixing rod 53, and the locking pin 51 passes through the mounting plate 52. The second limiting ring 54 is fixed on the locking pin 51. The reset spring 55 is sleeved on the locking pin 51 and is located between the mounting plate 52 and the second limiting ring 54. The limiting sleeve 56 is installed on the outside of the pen tip 3 by threaded engagement. With the above scheme, when in use, the pen tip of the pen core 2 is extended or retracted into the pen tip 3 by pressing the pressing cap 4, and the user can write by holding the pen tip 3.

[0034] When the tip of the pen refill 2 extends or retracts into the pen head 3, the limiting sleeve 56 is rotated. Since the limiting sleeve 56 is installed on the outside of the pen head 3 by means of threaded engagement, the rotational force of the limiting sleeve 56 is converted into the linear movement of the limiting sleeve 56, causing the limiting sleeve 56 to apply force to the inclined surface of the locking pin 51. The inclined surface generates a component force that pushes the locking pin 51 toward the inside of the pen head 3 until the end of the locking pin 51 abuts against the inclined surface 21 of the pen refill 2, locking the pen refill 2. At this time, the return spring 55 is in a contracted state. Because of the restriction of the locking pin 51, the pressing cap 4 cannot be pressed, which can keep the pen refill 2 stable in the extended or retracted state, avoiding the pen refill 2 extending or retracting into the pen head 3 due to misoperation, improving the user experience. In particular, it avoids the problem of the pen tip being easily damaged by the pen refill 2 accidentally extending into the pen head 3 during carrying, and improves the safety of carrying the press pen.

[0035] In addition, when it is necessary to move the pen refill 2, the limiting sleeve 56 is rotated in the opposite direction to move the limiting sleeve 56 away from the locking pin 51. At this time, the reset spring 55 releases its elastic force to reset the locking pin 51. The locking pin 51 moves away from the pen refill 2, and the pen tip 2 can continue to be extended or retracted by pressing the pressing cap 4.

[0036] It should be noted that the inclined surface 21 on the pen refill 2 is only an exemplary description of this utility model and is not intended to limit this utility model, because in real life, not all pen refills 2 have an inclined surface 21. Some pen refills 2 have a stepped structure (because the diameter of the pen tip is smaller than the diameter of the refill rod). Such pen refills 2 can still be locked using the locking mechanism 5.

[0037] Preferably, Figures 1-3 As shown, as an optional embodiment, in this embodiment, multiple sets of locking mechanisms 5 are evenly distributed along the circumference. After adopting the above scheme, when in use, multiple sets of locking mechanisms 5 realize multi-point clamping, eliminate single-point stress concentration, prevent the pen core 2 from tilting or rotating, and improve the safety of the press pen.

[0038] The radial force of multiple locking pins 51 automatically calibrates the pen refill axis, preventing eccentric wear between the pen refill 2 and the pen tip 3, thus improving the safety of the pen refill 2.

[0039] Preferably, by Figures 1-3 As shown in this embodiment, the mounting plate 52 is fixed to the inner wall of the pen tip 3 by four diagonally distributed fixing rods 53. With the above solution, the four points form a statically determinate structure during use, which at the same time constrains the translation, rotation and tilt of the mounting plate 52, avoids the locking pin 51 from getting stuck due to the deformation of the mounting plate 52, and reduces local stress concentration.

[0040] Preferably, by Figures 1-3 As shown, in this embodiment, the outer wall of the locking pin 51 abuts against the inner wall of the through hole 31. After adopting the above solution, when in use, the outer wall of the locking pin 51 and the inner wall of the through hole 31 are interference fit (such as H7 / p6) with an interference amount of 0.01-0.03mm, or transition fit (such as H7 / k6) to ensure the stability of the locking pin 51 installation.

[0041] Preferably, by Figures 1-3 As shown in this embodiment, the locking pin 51 is a square rod-shaped structure and the through hole 31 is a square hole. With the above solution, the square design can effectively prevent the locking pin 51 from rotating or shaking in the through hole 31 during use, and further improve the stability of the locking pin 51.

[0042] Preferably, by Figures 1-4 As shown, this embodiment also includes: a first limiting ring 32, two first limiting rings 32 fixed at intervals on the pen tip 3, and a limiting sleeve 56 located between the two first limiting rings 32. With the above scheme, when in use, the two first limiting rings 32 are used to limit the movement range of the limiting sleeve 56 to ensure the safety of the limiting sleeve 56.

[0043] Preferably, by Figures 1-4 As shown in this embodiment, the outer diameter of the first limiting ring 32 is equal to the outer diameter of the limiting sleeve 56. After adopting the above solution, when the user holds the pen tip 3, a "stepless integrated grip surface" is formed on the outside of the pen, making the grip more comfortable and preventing any discomfort.

[0044] Preferably, by Figures 1-4 As shown, in this embodiment, anti-slip grooves 561 are evenly distributed on the outer wall of the limiting sleeve 56. After adopting the above scheme, when in use, the anti-slip grooves 561 are annular, axial or grid-shaped, and are evenly distributed along the circumference of the outer wall of the limiting sleeve 56 (such as a set of annular grooves every 120°, or an axial groove every 5mm), with a groove depth of 0.1-0.3mm and a groove width of 0.5-1mm.

[0045] The anti-slip groove 561 makes the pen tip 3 more stable for the user, avoiding the phenomenon of "slipping forward and backward".

[0046] Components not described in detail in this article are existing technologies.

[0047] The working principle and usage process of this utility model: The pen tip locking device of the automatic pressing pen of this utility model allows the pen tip 2 to extend or retract into the pen head 3 by pressing the pressing cap 4 during use, and the user can write by holding the pen head 3.

[0048] When the tip of the pen refill 2 extends or retracts into the pen head 3, the limiting sleeve 56 is rotated. Since the limiting sleeve 56 is installed on the outside of the pen head 3 by means of threaded engagement, the rotational force of the limiting sleeve 56 is converted into the linear movement of the limiting sleeve 56, causing the limiting sleeve 56 to apply force to the inclined surface of the locking pin 51. The inclined surface generates a component force that pushes the locking pin 51 toward the inside of the pen head 3 until the end of the locking pin 51 abuts against the inclined surface 21 of the pen refill 2, locking the pen refill 2. At this time, the return spring 55 is in a contracted state. Because of the restriction of the locking pin 51, the pressing cap 4 cannot be pressed, which can keep the pen refill 2 stable in the extended or retracted state, avoiding the pen refill 2 extending or retracting into the pen head 3 due to misoperation, improving the user experience. In particular, it avoids the problem that the pen tip is easily damaged if the pen refill 2 accidentally extends out of the pen head 3 during carrying, improving the safety of carrying the press pen.

[0049] In addition, when it is necessary to move the pen refill 2, rotate the limiting sleeve 56 in the opposite direction to move the limiting sleeve 56 away from the locking pin 51. At this time, the reset spring 55 releases its elastic force to reset the locking pin 51. The locking pin 51 moves away from the pen refill 2, and the pen tip of the pen refill 2 can continue to be extended out of the pen head 3 by pressing the pressing cap 4.

[0050] This invention, by twisting the limiting sleeve 56, causes the limiting sleeve 56 to press against the inclined surface of the locking pin 51. At this time, the locking pin 51 moves toward the inside of the pen tip and presses against the pen refill 2, locking the pen refill 2. At this time, the pressing cap 4 cannot be pressed, thus avoiding the pen refill 2 from extending or retracting into the pen tip 3 due to accidental operation, improving the user experience. In particular, it avoids the problem of the pen tip being easily damaged if the pen refill 2 accidentally extends out of the pen tip 3 during carrying, thus improving the safety of carrying the press pen.

[0051] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A refill locking device of an automatic pressing pen, comprising a pen barrel (1), a refill (2) arranged in the pen barrel (1), a pen tip (3) arranged at the tail end of the pen barrel (1) by screwing and a pressing cap (4) arranged at the head end of the pen barrel (1), the pen tip (3) of the refill (2) is extended or retracted by pressing the pressing cap (4), a slope (21) is arranged on the refill (2), characterized in that, Also comprising a locking mechanism (5), wherein the locking mechanism (5) comprises: a locking pin (51) facing the inclined surface (21), a through hole (31) is processed on the pen head (3) for the locking pin (51) to pass through, and the end face of the protruding end of the locking pin (51) is an inclined surface; a mounting plate (52) fixed to the inner wall of the pen head (3) by a fixing rod (53), and the locking pin (51) penetrates the mounting plate (52); a No. 2 limiting ring (54) fixed on the locking pin (51); a reset spring (55) sleeved on the locking pin (51) and between the mounting plate (52) and the No. 2 limiting ring (54); a limiting sleeve (56) installed on the outside of the pen head (3) by screwing.

2. The device according to claim 1, wherein: The locking mechanism (5) is equally spaced in the circumferential direction.

3. The device according to claim 1, wherein: The mounting plate (52) is fixed to the inner wall of the pen head (3) by four diagonally distributed fixing rods (53).

4. The device according to claim 1, wherein: The outer wall of the locking pin (51) abuts against the inner wall of the through hole (31).

5. The device according to claim 1, wherein: The locking pin (51) is a square rod structure, and the through hole (31) is a square hole.

6. The device according to claim 1, wherein: Also comprising: a No. 1 limiting ring (32), two No. 1 limiting rings (32) are fixed on the pen head (3) at intervals, and the limiting sleeve (56) is located between the two No. 1 limiting rings (32).

7. A device for locking the cartridge of a ballpoint pen according to claim 6, characterized in that: The outer diameter of the No. 1 limiting ring (32) is equal to the outer diameter of the limiting sleeve (56).

8. The device according to claim 7, wherein: Anti-skid grooves (561) are uniformly distributed on the outer wall of the limiting sleeve (56).

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