Pressing pen with self-locking function
By introducing a self-locking function and a linked clip extension and retraction structure into the push-button pen, the problem of contamination and damage caused by accidental extension of the pen tip is solved, enabling the pen to be safely carried and conveniently used in a bag.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU AIHAO PEN TRADE CO LTD
- Filing Date
- 2025-04-16
- Publication Date
- 2026-05-12
AI Technical Summary
When existing push-button pens are placed in a bag, the button is easily squeezed, causing the pen tip to extend accidentally, contaminating the items in the bag and damaging the pen tip.
A self-locking push-button pen was designed. Through the cooperation of the transmission rod and the limiting component, the pen tip is self-locked when it is in the retracted state to prevent accidental extension by pressing. It also links the pen clip's retraction and extension structure to ensure that the pen tip is not easily damaged.
It effectively prevents the pen tip from accidentally protruding inside the bag, protects the items inside the bag from contamination, avoids damage to the pen tip, and allows for convenient storage and retrieval of the pen clip, improving ease of use.
Smart Images
Figure CN224224803U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a push-button pen with a self-locking function. Background Technology
[0002] Existing push-button pens typically include components such as a pen barrel, a refill, a telescopic locking mechanism, a button, a spring, and a clip. The refill and telescopic locking mechanism are located inside the pen barrel and are linked to the refill and button. The spring is located between the front end of the refill and the pen barrel. The telescopic locking mechanism usually includes a front tooth component, a rear tooth component, and a guide rail located on the inner wall of the pen barrel. The guide rail, the front tooth component, and the rear tooth component form a locking engagement. By alternately pressing the button, the refill can be driven to extend from the front end of the pen barrel and remain in the extended state, or driven to retract into the pen barrel. A clip is usually provided on the side of the pen barrel for easy attachment to clothing or books.
[0003] When existing push-button pens are carried in a bag, the button may be squeezed by other items in the bag, causing the pen tip to protrude and contaminate other items in the bag, such as paper and clothing. At the same time, the pen tip may also be damaged during friction and collision with other items, affecting the writing function. Utility Model Content
[0004] In order to overcome the shortcomings of the prior art, this utility model provides a push-button pen with a self-locking function, which can lock when the pen is in the retracted state to prevent the pen tip from being accidentally extended due to pressing.
[0005] This utility model discloses a self-locking push-button pen, comprising a pen barrel, a pen refill, a button, a transmission rod, a spring, and a telescopic locking mechanism. The button is movably disposed at the rear end of the pen barrel. The pen refill and the transmission rod are movably disposed within the pen barrel. The telescopic locking mechanism is connected between the rear end of the pen refill and the front end of the transmission rod. The rear end of the transmission rod is connected to the button. The spring rests between the pen refill and the pen barrel. The transmission rod can be driven to rotate by the button. A partition is provided in the inner cavity of the pen barrel at the rear side corresponding to the telescopic locking mechanism. The partition has a through groove that movably passes through the transmission rod. The transmission rod includes a limiting part disposed on its side. When the transmission rod is in a specified rotation position, its limiting part can pass through the through groove in the front-back direction. When the transmission rod is in other rotation positions, the limiting part and the partition form a limiting engagement in the front-back direction, preventing the transmission rod from moving forward. When the transmission rod is in the specified rotation position, the button can be pressed alternately to alternately extend and retract the pen tip. During this process, the force of pressing drives the pen tip forward, and the elastic force of the spring drives the pen tip backward. When the pen is in the retracted state, the transmission rod can be rotated by pressing the button to other rotation positions. This causes the limiting part and the partition to form a limiting engagement, preventing the transmission rod from being pressed forward and thus preventing the pen tip from being pressed out. When placed in a bag, it is less likely to be accidentally pressed out, protecting other items in the bag from ink contamination and protecting the pen tip (i.e., the front end of the pen tip) from damage.
[0006] Furthermore, it also includes a pen clip. The side of the pen barrel has an opening communicating with its inner cavity. The pen clip includes a connecting end that is movably inserted into the inner cavity of the pen barrel along the opening. The connecting end includes a socket hole. The transmission rod is movably inserted into the socket hole. The transmission rod can be driven by the button to move forward relative to the connecting end. The inner walls of the opposite sides of the socket hole are provided with protrusions. Both sides of the transmission rod are provided with guide slopes that slide and engage with the two protrusions respectively. Preferably, the protrusions have arc-shaped contact surfaces to improve the sliding contact effect with the guide slopes. When the transmission rod moves forward at a predetermined rotational position, it drives the pen clip to move closer to the pen barrel via a set of cooperating protrusions and guide slopes, thereby retracting the pen clip. When the transmission rod moves backward at a predetermined rotational position, it drives the pen clip to move away from the pen barrel via another set of cooperating protrusions and guide slopes, thereby releasing the pen clip. This enables the linkage between the retraction and extension of the pen clip and the extension and retraction of the pen refill, allowing the pen clip to retract when writing and to extend for use when not writing. The partition is located on the front side of the corresponding pen clip connection end.
[0007] Furthermore, the transmission rod includes a rod body, with a first convex wall protruding outward on one side of the rod body and a second convex wall protruding outward on the other side of the rod body. The two guide inclined surfaces are respectively formed by the rear end face of the first convex wall and the front end face of the second convex wall. When the transmission rod moves backward, the rear end face of the first convex wall and one of the protrusions cooperate to bear force. When the transmission rod moves forward, the front end face of the second convex wall and the other protrusion cooperate to bear force.
[0008] Furthermore, the through groove includes a base hole and two notches symmetrically connected on both sides of the base hole. The base hole cooperates with the rod body to guide movement. The two notches are respectively engaged with the first convex wall and the second convex wall and are movably inserted. The rod body has a cylindrical outer circumferential surface, and notches are correspondingly provided on both sides of the rod body. The first convex wall and the second convex wall are respectively provided in the notches on both sides of the rod body. The base hole is circular. The base hole and the outer circumferential surface of the rod body form a movement and rotational cooperation in the front-back direction, which improves the movement effect of the transmission rod relative to the pen barrel and makes the transmission rod less prone to tilting, shaking and jamming.
[0009] Furthermore, the limiting part is composed of a first convex wall. The front end face of the first convex wall and the rear side of the partition cooperate to limit the movement of the transmission rod. The first convex wall can be used to push the pen clip to move, and can also cooperate with the partition to limit the movement, which helps to simplify the structure.
[0010] Furthermore, the telescopic locking mechanism includes a front tooth component, a rear tooth component, and a guide rail disposed on the inner wall of the pen barrel. The front tooth component, the rear tooth component, and the guide rail form a connection that allows them to move back and forth relative to the pen barrel but prevents them from rotating relative to the pen barrel. The rear end of the pen refill abuts against the front tooth component. The front end of the transmission rod includes a connecting post. The connecting post and the rear tooth component form a limiting connection in the front-back direction and a connection that allows them to rotate relative to each other. The rear tooth component and the partition form a limiting connection in the front-back direction.
[0011] When the button is pressed, the transmission rod pushes the rear toothed component forward. As the rear toothed component moves forward, it pushes the front toothed component forward. As the front toothed component moves forward, it pushes the pen tip forward. When the front toothed component disengages from the circumferential restriction of the guide rail (i.e., disengages from the front end of the guide rail), the engagement between the front and rear toothed components drives the front toothed component to rotate. When the button is released, the front toothed component is driven by the spring to move backward and rotates when it comes into contact with the front end of the guide rail. When the guide rail and the front toothed component's groove are misaligned, it can engage with the front end of the guide rail to limit the pen tip and keep it in the extended state. Pressing and releasing the button again drives the front toothed component to rotate, aligning the guide rail and the front toothed component's groove, releasing the limit between the front toothed component and the front end of the guide rail, and then using the spring to drive the pen tip back into the pen barrel.
[0012] When combined with the pen clip's retraction and extension mechanism, pressing the button alternately can achieve the following: pushing the pen tip out and keeping it in the extended state, with the front tooth component and the transmission rod both in a forward position, keeping the pen clip close to the pen barrel, thus retracting the pen clip; or driving the pen tip back and keeping it in the retracted state, while the transmission rod being in a rearward position, it can also keep the pen clip away from the pen barrel, thus extending the pen clip.
[0013] In addition to achieving the above effects, the connecting column and the rear tooth component form a limiting fit in the front-to-back direction, and the rear tooth component and the partition form a limiting fit in the front-to-back direction, which prevents the transmission rod and the button from coming off backward along the pen barrel.
[0014] Furthermore, the rear tooth component includes a central hole, and the connecting post includes an annular groove that fits into the inner edge of the central hole, enabling both relative rotation and a limiting fit along the length direction. A protrusion is provided at the annular groove, and a movable groove is provided at the inner edge of the central hole. The protrusion is limited at both ends of the movable groove along the circumferential direction, allowing circumferential movement within the limited range of the movable groove. Based on the circumferential limiting fit between the rear tooth component and the pen barrel via the guide rail, the cooperation of the protrusion and the movable groove can limit the rotation angle of the transmission rod relative to the pen barrel, facilitating the user's rotation operation. At the same time, when combined with the pen clip retraction structure, it can prevent the transmission rod from excessively rotating and jamming.
[0015] Furthermore, when the protrusion engages with one end of the movable groove along the circumferential direction for limiting the movement, the transmission rod is in a predetermined rotational position; when the protrusion engages with the other end of the movable groove along the circumferential direction for limiting the movement, the transmission rod is in other rotational positions, facilitating user operation.
[0016] Furthermore, the front tooth component includes a central hole, through which it is sleeved on the connecting post and can move back and forth and rotate along the connecting post. The front end of the connecting post is provided with an anti-disengagement part that cooperates with the front tooth component, which can keep the front tooth component and the transmission rod connected together. When the user removes and replaces the pen refill from the front end of the pen barrel, the front tooth component will not come off forward along the pen barrel, making it convenient to replace the pen refill.
[0017] Furthermore, the pen and button are equipped with alignment marks to indicate the locked and unlocked status, making it easy for users to intuitively determine the current locked status.
[0018] The beneficial effects of this utility model are: the push-button pen of this utility model has a self-locking function, which can lock when the pen is in the retracted state to prevent the pen tip from being accidentally extended due to pressing. In a further defined scheme, it can also realize the retraction and extension of the pen clip while driving the pen tip to extend and retract. Attached Figure Description
[0019] Figure 1 This is a structural diagram of an embodiment of the present utility model;
[0020] Figure 2 This is a partial cross-sectional view of an embodiment of the present invention in the pen clip retracted state (corresponding to the pen refill extended state);
[0021] Figure 3 This is a partial cross-sectional view of an embodiment of the present invention in the pen clip extended state (corresponding to the pen retracted state);
[0022] Figure 4 This is a partial cross-sectional view of an embodiment of the present invention in the pen clip extended state (corresponding to the pen retracted state);
[0023] Figure 5 This is a cross-sectional view of an embodiment of the present invention in the pen clip extended state (corresponding to the pen retracted state);
[0024] Figure 6 This is a cross-sectional view of an embodiment of the present invention in the self-locking state (corresponding to the pen clip extended and the pen retracted state);
[0025] Figure 7 This is an exploded view of the transmission rod, front tooth component, rear tooth component, and pen clip according to an embodiment of the present utility model.
[0026] Figure 8 This is a structural diagram of the pen clip according to an embodiment of the present invention;
[0027] Figure 9 This is a structural diagram of the transmission rod in an embodiment of the present utility model;
[0028] Figure 10 This is a structural diagram of the pen barrel according to an embodiment of the present utility model. Detailed Implementation
[0029] The structure of the self-locking push-button pen of this utility model embodiment is as follows: Figure 1-10As shown, the device includes a pen barrel 1, a pen refill 2, a button 3, a pen clip 4, a transmission rod 5, and a spring. The button 3 is movably disposed at the rear end of the pen barrel 1. The pen refill 2 and the transmission rod 5 are movably disposed within the pen barrel 1. The spring abuts against the pen refill 2 and the pen barrel 1. The transmission rod 5 is drivingly connected between the button 3 and the pen refill 2, and is used to actuate the button 3 and the pen refill 2. The side of the pen barrel 1 has an opening 11 communicating with its inner cavity 10. The pen clip 4 includes a connecting end 41 that is movably inserted into the inner cavity 10 of the pen barrel 1 along the opening 11. The connecting end 41 includes a socket, and the transmission rod 5 is movably inserted into the socket. The transmission rod 5 can be driven forward relative to the connecting end 41 by the button 3, and can be indirectly driven backward to return to its original position by a spring through the pen refill 2. The inner walls of the opposite sides of the socket are provided with protrusions 42. Both sides of the transmission rod 5 are provided with guide slopes 51 that slide and engage with the two protrusions 42 respectively. Preferably, the protrusions 42 have arc-shaped contact surfaces to improve the sliding contact effect with the guide slopes 51. When the transmission rod 5 moves forward at a predetermined rotational position, it drives the pen clip 4 to move closer to the pen barrel 1 via a set of cooperating protrusions 42 and guide slopes 51, thus retracting the pen clip 4. When the transmission rod 5 moves backward at a predetermined rotational position, it drives the pen clip 4 to move away from the pen barrel 1 via another set of cooperating protrusions 42 and guide slopes 51, thus extending the pen clip 4. This enables the linkage between the retraction and extension movements of the pen clip 4 and the extension and retraction movements of the pen refill 2, allowing the pen clip 4 to retract when writing with the pen. When not writing, the pen clip 4 is released for clamping and use; a partition 12 is provided in the inner cavity 10 of the pen barrel 1 at the front side of the corresponding pen clip 41 connection end; the partition 12 is provided with a through groove that moves through in cooperation with the transmission rod 5; the transmission rod 5 includes a limiting part provided on the side; when the transmission rod 5 is in a specified rotation position, its limiting part can pass through the through groove in the front-back direction; when the transmission rod 5 is in other rotation positions, the limiting part and the partition 12 form a limiting cooperation in the front-back direction, preventing the transmission rod 5 from moving forward.
[0030] The specific structure of transmission rod 5 is as follows: Figure 9 As shown, the transmission rod 5 includes a rod body 52. A first convex wall 531 protrudes outward on one side of the rod body 52, and a second convex wall 532 protrudes outward on the other side of the rod body 52. Two guide inclined surfaces 51 are respectively formed by the rear end face of the first convex wall 531 and the front end face of the second convex wall 532. The two guide inclined surfaces 51 are arranged in parallel. The rod body 52 has a cylindrical outer peripheral surface 521. Notches 522 are provided on both sides of the rod body 52. The first convex wall 531 and the second convex wall 532 are respectively arranged in the notches 522 on both sides of the rod body 52. When the transmission rod 5 moves backward, the rear end face of the first convex wall 531 and one of the protrusions 42 cooperate to bear force. When the transmission rod 5 moves forward, the front end face of the second convex wall 532 and the other protrusion 42 cooperate to bear force.
[0031] like Figure 5 , 6 As shown in Figure 10, the through groove includes a base hole 121 and two notches 122 symmetrically connected on both sides of the base hole 121. The base hole 121 cooperates with the rod body 52 to guide the movement. The two notches 122 are respectively cooperated with the first convex wall 531 and the second convex wall 532 to move through. When the transmission rod 5 is in the specified rotation position, the first convex wall 531 and the second convex wall 532 are in the position aligned with the two notches 122, and can pass normally along the two notches 122. The base hole 121 is circular. The base hole 121 and the outer peripheral surface 521 of the rod body 52 form a movement and rotation cooperation in the front and rear direction, which improves the movement effect of the transmission rod 5 relative to the pen barrel 1 and makes the transmission rod 5 less prone to tilting, shaking and jamming.
[0032] The limiting part is composed of a first convex wall 531. The front end face of the first convex wall 531 and the rear side of the partition 12 cooperate to limit the movement of the transmission rod 5. The first convex wall 531 can be used to push the pen clip 4 to move, and can also cooperate with the partition 12 to limit the movement, which helps to simplify the structure.
[0033] When the pen is in the lead-out position, such as Figure 2 As shown, the transmission rod 5 is in a forward position in the front-to-back direction and in a predetermined rotation position in the circumferential direction (i.e., the first convex wall 531, the second convex wall 532 and the two notches 122 are aligned). The pen clip 4 is retracted, and the first convex wall 531 is located in front of the partition 12.
[0034] When the pen is in the unlocked retracted state, such as Figure 3 , 5 As shown, the transmission rod 5 is in a rearward position in the front-to-back direction and in a predetermined rotation position in the circumferential direction (i.e., the first convex wall 531, the second convex wall 532 and the two notches 122 are aligned). The pen clip 4 is released, and the first convex wall 531 is located behind the partition 12.
[0035] When the pen is in the retracted state, the transmission rod 5 can be rotated by button 3 to switch to the self-locking state, such as... Figure 4 , 6 As shown, the transmission rod 5 is in a rearward position in the front-to-back direction and in other rotational positions in the circumferential direction (i.e., the first convex wall 531, the second convex wall 532, and the two notches 122 are not aligned). When the pen clip 4 is released, the first convex wall 531 is located behind the partition 12. Due to the misalignment of the first convex wall 531 and the notch 122, the first convex wall 531 is blocked by the partition 12 and cannot move forward, thus failing to drive the lead to be ejected. When placed in the bag, it is not easy to accidentally press the lead to be ejected, protecting other objects in the bag from ink contamination and also protecting the pen tip (i.e. the front end of the pen lead 2) from damage.
[0036] In addition to the above-described structure, the pen also includes a telescopic locking mechanism disposed within the pen barrel 1. The telescopic locking mechanism is tractively connected between the pen refill 2 and the transmission rod 5 and is located in front of the partition plate 12. The telescopic locking mechanism includes a front tooth component 61, a rear tooth component 62, and a guide rail 63 disposed on the inner wall of the pen barrel 1. The front tooth component 61, the rear tooth component 62, and the guide rail 63 form a connection that allows them to move back and forth relative to the pen barrel 1 but prevents them from rotating relative to the pen barrel 1. Specifically, this is achieved through the guide grooves disposed on the periphery of the front tooth component 61 and the rear tooth component 62 and the guide rail 63 in a movable fit. The rear end of the pen refill 2 abuts against the front tooth component 61. The front end of the transmission rod 5 includes a connecting post 54, and the rear end of the transmission rod 5 includes a connecting seat that is connected to the button 3. The connecting post 54 and the rear tooth component 62 form a limiting fit in the front-back direction and a relatively rotatable connection fit. The rear tooth component 62 and the partition plate 12 form a limiting fit in the front-back direction.
[0037] When button 3 is pressed, the transmission rod 5 pushes the rear tooth component 62 forward. When the rear tooth component 62 moves forward, it pushes the front tooth component 61 forward. When the front tooth component 61 moves forward, it pushes the pen tip 2 forward. When the front tooth component 61 is disengaged from the circumferential restriction of the guide rail 63 (i.e., disengaged from the front end of the guide rail 63), the engagement between the front tooth component 61 and the rear tooth component 62 drives the front tooth component 61 to rotate. After button 3 is released, the front tooth component 61 is driven by the spring to move backward and rotates when it comes into contact with the front end of the guide rail 63. When the guide rail 63 and the front tooth component 61 are misaligned, the front tooth component 61 can engage with the front end of the guide rail 63 to limit the pen tip 2 to stay in the lead-out state. By pressing and releasing button 3 again, the front tooth component 61 can be driven to rotate again, so that the guide rail 63 and the front tooth component 61 are aligned, releasing the limit between the front tooth component 61 and the front end of the guide rail 63, and then the pen tip 2 is driven by the spring to retract into the pen barrel 1.
[0038] When the button 3 is pressed alternately, the following actions can be achieved: pushing the pen tip 2 out and keeping it in the extended state, with the front tooth component 61 and the transmission rod 5 both in the forward position, and the pen clip 4 kept in a position close to the pen barrel 1, thus retracting the pen clip 4; or driving the pen tip 2 to retract and keep it in the retracted state, while the transmission rod 5 is in a rearward position, thus keeping the pen clip 4 in a position away from the pen barrel 1, thus releasing the pen clip 4.
[0039] In addition to achieving the above effects, since the connecting post 54 and the rear tooth component 62 form a limiting fit in the front-to-back direction, and the rear tooth component 62 and the partition plate 12 form a limiting fit in the front-to-back direction, this prevents the transmission rod 5 and the button 3 from coming off backward along the pen barrel 1.
[0040] The rear tooth component 62 includes a central hole, and the connecting post 54 includes an annular groove 541 that fits into the inner edge of the central hole of the rear tooth component 62. This allows for relative rotation and also forms a limiting fit along the length direction, enabling the rear tooth component 62 and the transmission rod 5 to move back and forth synchronously.
[0041] A protrusion 542 is provided at the annular groove 541, and a movable groove 621 is provided at the inner edge of the central hole. The protrusion 542 is engaged and limited at both ends of the movable groove 621 along the circumferential direction, and moves circumferentially within the limited range of the movable groove 621. Based on the circumferential limiting engagement between the rear tooth component 62 and the pen barrel 1 through the guide rail 63, the engagement of the protrusion 542 and the movable groove 621 can limit the rotation angle of the transmission rod 5 relative to the pen barrel 1, and avoid the problem of jamming due to excessive rotation of the transmission rod 5.
[0042] When the protrusion 542 engages with one end of the movable groove 621 in the circumferential direction for limiting the movement, the transmission rod 5 is in a predetermined rotational position. When the protrusion 542 engages with the other end of the movable groove 621 in the circumferential direction for limiting the movement, the transmission rod 5 is in other rotational positions, which facilitates user operation.
[0043] The front tooth component 61 includes a central hole. The front tooth component 61 is sleeved on the connecting post 54 through the central hole and can move back and forth and rotate along the connecting post 54. The front end of the connecting post 54 is provided with an anti-disengagement part 543 that cooperates with the front tooth component 61, which can keep the front tooth component 61 and the transmission rod 5 connected together. When the user removes and replaces the pen refill from the front end of the pen barrel 1, the front tooth component 61 will not come out forward along the pen barrel 1, which facilitates the replacement of the pen refill.
[0044] The pen barrel 1 and button 3 are provided with alignment marks (not shown in the figure) to indicate the locked and unlocked states, so that users can intuitively judge the current locked state. For example, an arrow can be set on the button 3, and two alignment lines can be set along the circumference on the rear side of the pen barrel 1. When the arrow of the button 3 is rotated to the two alignment lines, it corresponds to the self-locking and unlocking states respectively.
[0045] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.
Claims
1. A self-locking push-button pen, comprising a pen barrel, a pen refill, a button, a transmission rod, a spring, and a telescopic locking mechanism, wherein the button is movably disposed at the rear end of the pen barrel, the pen refill and the transmission rod are movably disposed within the pen barrel, the telescopic locking mechanism is connected between the rear end of the pen refill and the front end of the transmission rod, the rear end of the transmission rod is connected to the button, and the spring abuts against the pen refill and the pen barrel, characterized in that: The transmission rod can be driven to rotate by a button. A partition is provided in the inner cavity of the pen barrel at the rear side of the corresponding telescopic locking mechanism. A through groove is provided on the partition to cooperate with the transmission rod. The transmission rod includes a limiting part provided on the side. When the transmission rod is in a specified rotation position, its limiting part can pass through the through groove in the front-back direction. When the transmission rod is in other rotation positions, the limiting part and the partition form a limiting cooperation in the front-back direction.
2. A click pen with self-locking function according to claim 1, characterized in that: The device includes a pen clip. The side of the pen barrel has an opening communicating with its inner cavity. The pen clip includes a connecting end that is movably inserted into the inner cavity of the pen barrel along the opening. The connecting end includes a socket hole. A transmission rod is movably inserted into the socket hole. The transmission rod can be driven by the button to move forward relative to the connecting end. The inner walls of the opposite sides of the socket hole are provided with protrusions. Both sides of the transmission rod are provided with guide slopes that slide and engage with the two protrusions respectively. When the transmission rod moves forward at a predetermined rotation position, it drives the pen clip to move closer to the pen barrel through a set of engaging protrusions and guide slopes. When the transmission rod moves backward at a predetermined rotation position, it drives the pen clip to move away from the pen barrel through another set of engaging protrusions and guide slopes. The partition is located at the front side of the corresponding pen clip connecting end.
3. A click pen with self-locking function according to claim 2, characterized in that: The transmission rod includes a rod body, a first convex wall protruding outward on one side of the rod body, and a second convex wall protruding outward on the other side of the rod body. The two guide inclined surfaces are respectively formed by the rear end face of the first convex wall and the front end face of the second convex wall.
4. The click pen with self-locking function according to claim 3, characterized in that: The through groove includes a base hole and two notches symmetrically connected on both sides of the base hole. The base hole cooperates with the rod body for guiding movement. The two notches are respectively engaged with the first convex wall and the second convex wall and are movably inserted. The rod body has a cylindrical outer peripheral surface. Notches are correspondingly provided on both sides of the rod body. The first convex wall and the second convex wall are respectively provided in the notches on both sides of the rod body. The base hole is circular. The base hole and the outer peripheral surface of the rod body form a movement and rotational engagement in the front-back direction.
5. The click pen with self-locking function according to claim 3, characterized in that: The limiting part is composed of a first convex wall, and the front end face of the first convex wall and the rear side of the partition cooperate to limit the movement of the transmission rod.
6. The click pen with self-locking function according to claim 1, characterized in that: The telescopic locking mechanism includes a front tooth component, a rear tooth component, and a guide rail disposed on the inner wall of the pen barrel. The front tooth component, the rear tooth component, and the guide rail form a connection that allows them to move back and forth relative to the pen barrel but prevents them from rotating relative to the pen barrel. The rear end of the pen refill abuts against the front tooth component. The front end of the transmission rod includes a connecting post. The connecting post and the rear tooth component form a limiting connection in the front-back direction and a connection that allows them to rotate relative to each other. The rear tooth component and the partition form a limiting connection in the front-back direction.
7. A click pen with self-locking function according to claim 6, characterized in that: The rear tooth component includes a central hole, and the connecting post includes an annular groove that fits into the inner edge of the central hole; a protrusion is provided in the annular groove, and a movable groove is provided at the inner edge of the central hole; the protrusion is limited at both ends of the movable groove in the circumferential direction and moves circumferentially within the limited range of the movable groove.
8. The click pen with self-locking function according to claim 7, characterized in that: When the protrusion is limited in position by cooperating with one end of the movable slot in the circumferential direction, the transmission rod is in a specified rotational position, and when the protrusion is limited in position by cooperating with the other end of the movable slot in the circumferential direction, the transmission rod is in another rotational position.
9. The click pen with self-locking function according to claim 6, characterized in that: The front tooth component comprises a central hole, the front tooth component is sleeved on the connecting column through the central hole and can move forward and backward and rotate along the connecting column, and the front end of the connecting column is provided with an anti-disengagement part matched with the front tooth component.
10. The click pen with self-locking function according to claim 1, characterized in that: The pen barrel and the button are provided with alignment marks matched with the locking and unlocking states.