A push automatic release pen
By designing a self-locking component for the press-to-release pen, the problem of ink leakage caused by the pen cap falling off is solved, achieving safe storage of the pen tip and convenient use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DELI GROUP CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-05-29
AI Technical Summary
Existing ballpoint pens or gel pens are prone to ink leakage and contamination of items inside bags when carried, as the pen cap may fall off and expose the pen tip.
A press-activated automatic release pen was designed, which adopts a self-locking buckle assembly, including a switch clip and a self-locking buckle housing. The pen barrel and pen cap are locked and unlocked by an elastic element, and the pen barrel and pen cap are separated by a one-button press.
It enables safe storage of the pen tip when not in use, preventing the pen cap from falling off. When in use, it can be unlocked with one click, making it easy to operate and preventing ink leakage.
Smart Images
Figure CN224296894U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of stationery, and more specifically to a press-to-release pen. Background Technology
[0002] There are generally two types of ballpoint pens or gel pens in the current technology: one is an automatic pen, where the nib retracts automatically when the cap is pressed; the other is a non-automatic pen, where the cap and barrel are plugged in and the nib is stored in the cap. Both types of pens can protect the nib. However, with non-automatic pens, when the cap and barrel are plugged in and the pen is placed in a bag and squeezed, the cap can easily fall off accidentally, exposing the nib. This allows the ink from the refill to leak from the nib, staining the inside of the bag and the items inside. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a press-to-release pen. When the pen is not in use, the pen tip can be stored in the pen cap along with one end of the pen barrel and locked in place, and the pen cap is not easy to fall off. When the pen is needed, pressing the pen cap with one button can unlock the pen barrel and separate the pen barrel from the pen cap, making the operation convenient and safe.
[0004] The technical solution of this utility model is to provide a press-activated automatic release pen, including a pen barrel with a pen cap at one end and a pen tip located inside the pen cap at the end of the pen barrel. A self-locking assembly is provided inside the pen cap, comprising a switch clamp and a self-locking housing. The switch clamp is slidably disposed within the self-locking housing, and an elastic element is disposed between the switch clamp and the self-locking housing. The self-locking housing has a locking position and an unlocking position for limiting the switch clamp. Pressing the switch clamp with the pen tip causes the switch clamp to slide into the self-locking housing and compress the elastic element. The elastic element rebounds, pushing the switch clamp to slide in the opposite direction into the locking or unlocking position. A snap-fit connector is elastically connected to the switch clamp, and a snap-fit groove is provided on the pen barrel. When the switch clamp is limited to the locking position, the snap-fit connector is located inside the self-locking housing and is compressed by the self-locking housing, snapping into the snap-fit groove. When the switch clamp is limited to the unlocking position, the snap-fit connector extends out of the self-locking housing and rebounds, disengaging from the snap-fit groove.
[0005] Compared with existing technologies, the automatic release pen of this invention has the following advantages: When the pen is not in use, the pen tip is retracted into the pen cap, and the pen tip is pressed against the switch clamp and then released. The locking connector then enters the self-locking housing and is compressed and locked into the locking groove. The elastic element rebounds, limiting the switch clamp to the locked position and keeping the locking connector locked in the locking groove. That is, the pen is locked by the self-locking assembly, and the pen cap is not easy to fall off. When the pen is to be used, the pen cap is pressed with one button, that is, the pen tip is pressed against the switch clamp again and then released. The switch clamp leaves the locked position and enters the unlocked position under the rebound of the elastic element and is limited. The locking connector extends out of the self-locking housing and rebounds out of the locking groove and remains in this state. That is, the pen is unlocked. At this time, the pen can be taken out from the pen cap and used. The pen cap can be automatically released from the pen with one button press, which is convenient and safe to operate.
[0006] Preferably, the switch clamp is provided with a sliding buckle, one end of which is rotatably connected to the switch clamp, and the other end is provided with a first protrusion. The self-locking housing is provided with end-to-end sliding tracks, with both the locking and unlocking positions located on these tracks. The first protrusion is slidably connected to the tracks and can slide along the tracks into the locking or unlocking positions. The sliding of the first protrusion along the tracks allows the sliding buckle to rotate relative to the switch clamp. This structure allows the switch clamp to slide and extend smoothly and without obstruction within the self-locking housing. The end-to-end sliding tracks facilitate the elastic element's rebound, pushing the switch clamp into the locking or unlocking positions alternately, thus enabling the pen to be easily locked or unlocked with a single press.
[0007] Preferably, the slide rail includes a second buckle slide rail arranged diagonally from top to bottom, a third buckle slide rail arranged diagonally from bottom to top, a fourth buckle slide rail arranged diagonally from top to bottom, and a first buckle slide rail arranged diagonally from bottom to top. The second buckle slide rail, the third buckle slide rail, the fourth buckle slide rail and the first buckle slide rail are connected sequentially to form a closed loop. The locking position is located at the bottom end of the second buckle slide rail, and the unlocking position is located at the bottom end of the first buckle slide rail. This structure features a specific slide configuration. The first latch slide is located below the second, third, and fourth latch slides. The bottom and top ends of the first latch slide connect to the bottom end of the fourth latch slide and the top end of the second latch slide, respectively. The first protrusion is initially located within the first latch slide. To lock the pen, the pen tip presses down on the switch clamp and then releases it. The first protrusion slides upward along the first latch slide to the top end of the second latch slide. Then, the elastic element rebounds and pushes the switch clamp, causing the first protrusion to slide along the second latch slide into the locked position. To unlock the pen, the pen tip presses down on the switch clamp and then releases it. The first protrusion slides upward along the third latch slide to the top end of the fourth latch slide. Then, the elastic element rebounds and pushes the switch clamp, causing the first protrusion to slide downward along the fourth latch slide until it reaches the unlocked position at the bottom end of the first latch slide. Subsequent locking and unlocking operations follow the same pattern.
[0008] Preferably, the inner wall of the self-locking housing is provided with an upper protrusion and a lower protrusion. The lower sidewall of the lower protrusion forms the upper sidewall of the first latch slide, and the upper sidewall of the lower protrusion and the lower sidewall of the upper protrusion respectively form the lower and upper sidewalls of the second, third, and fourth latch slides. This structure is simple and easy to manufacture. The upper and lower protrusions are located on the inner wall of the self-locking housing, facilitating the insertion of the first protrusion into the slide and preventing it from easily dislodging.
[0009] Preferably, a second protrusion is provided below the first protrusion on the sliding buckle. When the first protrusion is located at the uppermost end of the second buckle slide or the uppermost end of the fourth buckle slide, the second protrusion is limited by the upper side wall of the fourth buckle slide. This structure avoids the sliding buckle from sliding too far upward or rotating too much, which could prevent the first protrusion from smoothly entering the second or fourth buckle slide.
[0010] Preferably, the switch clamp is provided with a buckle hole, and the wall of the buckle hole is provided with a first support surface and a limiting step surface. The limiting step surface is higher than the first support surface, and the first support surface and the limiting step surface correspond to the upper and lower ends of the first buckle slide, respectively. The lower end of the sliding buckle is provided with a limiting post, which is inserted into the buckle hole. The side of the limiting post is provided with a second convex curved surface and a limiting surface. The second convex curved surface is rotatably fitted on the first support surface, and the limiting surface is fitted on the limiting step surface. The limiting step surface limits the sliding buckle to rotate towards one side of the limiting step surface. With this structure, the sliding buckle can only rotate a small angle towards one side of the first support surface. That is, the first convex post can only slide towards the upper end of the first buckle slide within the first buckle slide to ensure that it can enter the second buckle slide, and can only make a small swing, to avoid the first convex post failing to reach the uppermost end of the second buckle slide due to the sliding buckle rotating too much.
[0011] Preferably, the lower end of the sliding buckle has a first convex curved surface on the front side of the limiting post, and the switch clamp has a concave curved surface on the front side of the buckle hole. The first convex curved surface can rotatably fit within the concave curved surface. This structure facilitates the rotation of the sliding buckle.
[0012] Preferably, a second support surface is provided on the side wall of the switch clamp, and the sliding buckle is slidably engaged with the side wall on the back side of the first protrusion on the second support surface. With this structure, the second support surface supports the sliding buckle on the side wall on the back side of the first protrusion, preventing the first protrusion from disengaging from the slide rail.
[0013] Preferably, the switch clamp is provided with a pen tip hole and a spring hole, both of which communicate with the buckle hole. The pen tip passes through the pen tip hole from bottom to top and contacts the limiting surface, while one end of the elastic element passes through the spring hole from top to bottom and contacts the limiting post. With this structure, the forces of the pen tip and the elastic element are directly applied to the sliding buckle, making the sliding buckle more sensitive.
[0014] Preferably, the switch clamp is provided with a sliding protrusion, and the self-locking housing is provided with a clamp slide rail. The sliding protrusion is slidably connected within the clamp slide rail. When the switch clamp slides within the self-locking housing, the clamp slide rail guides and limits the sliding protrusion. This structure prevents the switch clamp from detaching from the self-locking housing and also facilitates control of the extension and retraction distance of the switch clamp relative to the self-locking housing, i.e., controlling the distance the pen tip presses on the switch clamp. Attached Figure Description
[0015] Figure 1 This is a cross-sectional view of the press-to-release pen of this utility model.
[0016] Figure 2 for Figure 1 A magnified view of region A in the middle.
[0017] Figure 3This is an exploded view of the press-and-release pen of this utility model.
[0018] Figure 4 This is a front view of the switch clip in the automatic release pen of this utility model.
[0019] Figure 5 This is a schematic diagram of the back structure of the switch clip in the press-to-release pen of this utility model.
[0020] Figure 6 This is a schematic diagram of the external structure of the self-locking outer shell in the press-to-release pen of this utility model.
[0021] Figure 7 This is a schematic diagram of the internal structure of the self-locking outer shell in the press-to-release pen of this utility model.
[0022] Figure 8 This is a schematic diagram of the sliding buckle in the press-and-release pen of this utility model.
[0023] As shown in the figure: 1. Pen barrel; 1-1. Snap-fit groove; 1-2. Pen tip; 2. Pen cap; 3. Pen cap; 4. Self-locking buckle assembly; 5. Switch clamp; 5-1. Snap-fit connector; 5-2. Pen tip hole; 5-3. Spring hole; 5-4. Buckle hole; 5-5. Limiting step surface; 5-6. First support surface; 5-7. Concave curved surface; 5-8. Second support surface; 5-9. Sliding protrusion; 5-10. Sliding surface; 6. Spring; 7. Self-locking buckle housing; 7-1. Clamp sliding cavity. 7-2, Clip-on connector limiting frame; 7-3, Spring seat; 7-4, Clamp slide rail; 7-5, First buckle slide rail; 7-6, Second buckle slide rail; 7-7, Locking position; 7-8, Third buckle slide rail; 7-9, Fourth buckle slide rail; 7-10, Unlocking position; 8, Sliding buckle; 8-1, First protrusion; 8-2, Second protrusion; 8-3, First convex surface; 8-4, Limiting post; 8-5, Limiting surface; 8-6, Second convex surface; 9, Upper protrusion; 10, Lower protrusion. Detailed Implementation
[0024] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.
[0025] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.
[0026] It should also be understood that the terms "comprising," "having," "including," and "containing," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. Furthermore, when expressions such as "...at least one" appear after a list of listed features, they modify the entire listed feature, not individual elements in the list.
[0027] like Figures 1 to 3 As shown, the automatic release pen of this utility model includes a pen barrel 1, a pen cap 2 at one end of the pen barrel 1, a pen tip 1-2 located at the end of the pen barrel 1 inside the pen cap 2, and a retaining groove 1-1 around the pen barrel 1 near the pen tip 1-2; a pen cap 3 is provided at the top of the pen cap 2, and a self-locking assembly 4 is provided inside the pen cap 2. The self-locking assembly 4 includes a switch clamp 5 and a self-locking housing 7. The tail end of the self-locking housing 7 is embedded in the pen cap 3 and limited by the pen cap 3. The switch clamp 5 is slidably disposed inside the self-locking housing 7 and an elastic spring 6 is provided between it and the self-locking housing 7. When the pen tip 1-2 presses the switch clamp 5, the switch clamp 5 can slide and retract into the self-locking housing 7 and compress the elastic spring 6.
[0028] like Figure 4 and Figure 5 As shown, the switch chuck 5 is provided with a buckle hole 5-4. The wall of the buckle hole 5-4 is provided with a first support surface 5-6 and a limiting step surface 5-5, and the limiting step surface 5-5 is higher than the first support surface 5-6. The two side walls of the switch chuck 5 parallel to the buckle hole 5-4 are sliding surfaces 5-10. A snap-fit connector 5-1 is elastically connected to the same end of the two sliding surfaces 5-10 of the switch chuck 5. A second support surface 5-8 is provided on one side wall of the switch chuck 5 perpendicular to the buckle hole 5-4, and a sliding protrusion 5-9 is provided on the other side wall of the switch chuck 5 perpendicular to the buckle hole 5-4. The two ends of the switch chuck 5 are respectively provided with a pen tip hole 5-2 communicating with the buckle hole 5-4 and a spring hole 5-3 communicating with the buckle hole 5-4. The pen tip hole 5-2 is located between the two snap-fit connectors 5-1. A concave curved surface 5-7 is also provided on the front side of the buckle hole 5-4 of the switch chuck 5. A sliding buckle 8 is provided inside the buckle hole 5-4.
[0029] like Figure 8As shown, the lower end of the sliding buckle 8 is provided with a limiting post 8-4, which is inserted into the buckle hole 5-4. The side of the limiting post 8-4 is provided with a second convex curved surface 8-6 and a limiting surface 8-5. The second convex curved surface 8-6 is rotatably fitted on the first support surface 5-6, and the limiting surface 8-5 is fitted on the limiting step surface 5-5. The limiting step surface 5-5 limits the rotation of the sliding buckle 8 towards one side of the limiting step surface 5-5. The pen tip 1-2 passes through the pen tip hole 5-2 from bottom to top and contacts the limiting surface 8-5. The lower end of the sliding buckle 8 is provided with a first convex curved surface 8-3 on the front side of the limiting post 8-4. The first convex curved surface 8-3 is rotatably fitted within the concave curved surface 5-7. The sliding buckle 8 has a first protrusion 8-1 on the front side of the limiting post 8-4, and a second protrusion 8-2 is provided below the first protrusion 8-1; the sliding buckle 8 is located on the side wall of the back side of the first protrusion 8-1 and slides on the second support surface 5-8.
[0030] like Figure 6 and Figure 7 As shown, the self-locking housing 7 has a collet sliding cavity 7-1 inside, and a snap-fit connector limiting frame 7-2 at the end of the self-locking housing 7. The left and right sidewalls of the collet sliding cavity 7-1 are respectively slidably engaged with the two sliding surfaces 5-10 of the switch collet 5. When the snap-fit connector 5-1 slides into the self-locking housing 7 along with the switch collet 5, the snap-fit connector limiting frame 7-2 compresses the snap-fit connector 5-1, causing the snap-fit connector 5-1 to snap into the snap-fit groove 1-1. The self-locking housing 7 has a spring seat 7-3 inside, with one end of the spring 6 sleeved on the spring seat 7-3 and the other end passing through the spring hole 5-3 and contacting the limiting post 8-4. The rear inner sidewall of the self-locking housing 7 has a collet slide rail 7-4, and a sliding protrusion 5-9 is slidably connected in the collet slide rail 7-4. When the switch collet 5 slides in the self-locking housing 7, the collet slide rail 7-4 guides and limits the sliding protrusion 5-9.
[0031] The inner front wall of the self-locking housing 7 is provided with an upper protrusion 9 and a lower protrusion 10 arranged vertically. The upper protrusion 9 and the lower protrusion 10 form a second buckle slide 7-6 arranged diagonally from top to bottom, a third buckle slide 7-8 arranged diagonally from bottom to top, a fourth buckle slide 7-9 arranged diagonally from top to bottom, and a first buckle slide 7-5 arranged diagonally from bottom to top. The lower side wall of the lower protrusion 10 forms the upper side wall of the first buckle slide 7-5. The upper side wall of the lower protrusion 10 and the lower side wall of the upper protrusion 9 respectively form the second buckle slide 7-6. The lower and upper sidewalls of the third and fourth buckle slides 7-8 and 7-9, respectively, and the second, third, and fourth buckle slides 7-6, 7-8, 7-9, and first buckle slide 7-5 are sequentially connected to form a closed loop slide. The first buckle slide 7-5 is located below the second, third, and fourth buckle slides 7-6 and 7-9. The lowest and highest points of the first buckle slide 7-5 are connected to the lowest point of the fourth buckle slide 7-9 and the highest point of the second buckle slide 7-6, respectively. The first support surface 5-6 and the limiting step surface 5-5 correspond to the upper and lower points of the first buckle slide 7-5, respectively.
[0032] The first protrusion 8-1 is slidably connected to the slide rail. The lowermost end of the second buckle slide rail 7-6 is set as the locking position 7-7, and the lowermost end of the first buckle slide rail 7-5 is set as the unlocking position 7-10. When the pen tip 1-2 presses the switch clip 5, the switch clip 5 slides into the self-locking housing 7 and compresses the spring 6. At the same time, the first protrusion 8-1 slides in the slide rail. The spring 6 rebounds and pushes the first protrusion 8-1 into the locking position 7-7 or the unlocking position 7-10, thus limiting the switch clip 5.
[0033] When the first protrusion 8-1 is located at the uppermost end of the second buckle slide 7-6 or the uppermost end of the fourth buckle slide 7-9, the second protrusion 8-2 is limited by the upper side wall of the fourth buckle slide 7-9. The sliding of the first protrusion 8-1 along the slide allows the sliding buckle 8 to rotate relative to the switch clamp 5, but the sliding buckle 8 can only rotate towards one side of the first support surface 5-6, that is, the second convex curved surface 8-6 rotates on the first support surface 5-6.
[0034] When the pen is not in use, the pen tip of the pen barrel 1 is retracted into the pen cap 2. The first protrusion 8-1 is initially located in the first buckle slide 7-5. After the pen tip 1-2 presses down on the switch clip 5 and is released, the first protrusion 8-1 will slide upward along the first buckle slide 7-5 to the top of the second buckle slide 7-6. At this time, the snap-fit connector 5-1 is located in the self-locking housing 7 and is compressed and snapped into the snap-fit groove 1-1. Then the spring 6 rebounds and pushes the switch clip 5. The first protrusion 8-1 will slide along the second buckle slide 7-6 into the locking position 7-7 and be limited in the locking position 7-7, so that the snap-fit connector 5-1 is kept in the state of being snapped into the snap-fit groove 1-1. That is, the pen barrel 1 is locked by the self-locking buckle assembly 4, and the pen cap is not easy to fall off.
[0035] When you want to use the pen, press the pen cap with one button, which means that the pen tip 1-2 presses the switch clip 5 again and then releases it. The first protrusion 8-1 leaves the locking position 7-7 and slides upward along the third clip slide 7-8 to the top of the fourth clip slide 7-9. Then the spring 6 rebounds and pushes the switch clip 5. The first protrusion 8-1 will slide downward along the fourth clip slide 7-9 until it enters the unlocking position 7-10 at the bottom of the first clip slide 7-5 and is limited in the unlocking position 7-10. The latch 5-1 extends out of the self-locking housing 7 and rebounds out of the latch groove 1-1 and remains in this state, that is, the pen barrel 1 is unlocked. At this time, you can take out the pen barrel from the pen cap and use the pen. In this way, the pen cap can be automatically released from the pen barrel with one button.
[0036] Based on the length of the pen tip, when the pen tip 1-2 press switch clamp 5 is set to 6 mm, the locking connector 5-1 retracts into the self-locking outer shell 7 and is compressed and locked into the locking groove 1-1.
[0037] The above are merely specific embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Any modifications or equivalent substitutions to this utility model without departing from its spirit and scope should be covered within the protection scope of the claims of this utility model.
Claims
1. A press-activated automatic release pen, comprising a pen barrel (1), a pen cap (2) provided at one end of the pen barrel (1), and a pen tip (1-2) located at the end of the pen barrel (1) located inside the pen cap (2); characterized in that, A self-locking assembly (4) is provided inside the pen cap (2). The self-locking assembly (4) includes a switch clamp (5) and a self-locking housing (7). The switch clamp (5) is slidably disposed inside the self-locking housing (7) and an elastic element is disposed between the switch clamp (7) and the self-locking housing (7). The self-locking housing (7) is provided with a locking position (7-7) and an unlocking position (7-10) for limiting the switch clamp (5). When the pen tip (1-2) presses the switch clamp (5), the switch clamp (5) can slide into the self-locking housing (7) and compress the elastic element. The elastic element rebounds and pushes the switch clamp. The head (5) slides in the opposite direction into the locking position (7-7) or the unlocking position (7-10); the switch chuck (5) is elastically connected to the snap-fit connector (5-1), and the pen barrel (1) is provided with a snap-fit groove (1-1). When the switch chuck (5) is limited to the locking position (7-7), the snap-fit connector (5-1) is located inside the self-locking housing (7) and is compressed by the self-locking housing (7) and snapped into the snap-fit groove (1-1); when the switch chuck (5) is limited to the unlocking position (7-10), the snap-fit connector (5-1) extends out of the self-locking housing (7) and is disengaged from the snap-fit groove (1-1) due to the rebound.
2. The press-to-release pen according to claim 1, characterized in that, A sliding buckle (8) is provided on the switch clamp (5). One end of the sliding buckle (8) is rotatably connected to the switch clamp (5), and the other end is provided with a first protrusion (8-1). A sliding track with the ends connected is provided on the self-locking housing (7). The locking position (7-7) or the unlocking position (7-10) is located on the sliding track. The first protrusion (8-1) is slidably connected to the sliding track and can slide along the sliding track into the locking position (7-7) or the unlocking position (7-10). The sliding of the first protrusion (8-1) along the sliding track can make the sliding buckle (8) rotate relative to the switch clamp (5).
3. The press-to-release pen according to claim 2, characterized in that, The slide rails include a second buckle slide rail (7-6) arranged diagonally from top to bottom, a third buckle slide rail (7-8) arranged diagonally from bottom to top, a fourth buckle slide rail (7-9) arranged diagonally from top to bottom, and a first buckle slide rail (7-5) arranged diagonally from bottom to top. The second buckle slide rail (7-6), the third buckle slide rail (7-8), the fourth buckle slide rail (7-9), and the first buckle slide rail (7-5) are connected in sequence to form a closed loop. The locking position (7-7) is located at the bottom of the second buckle slide rail (7-6), and the unlocking position (7-10) is located at the bottom of the first buckle slide rail (7-5).
4. The press-to-release pen according to claim 3, characterized in that, The inner wall of the self-locking housing (7) is provided with an upper protrusion (9) and a lower protrusion (10). The lower side wall of the lower protrusion (10) forms the upper side wall of the first buckle slide (7-5). The upper side wall of the lower protrusion (10) and the lower side wall of the upper protrusion (9) respectively form the lower and upper side walls of the second buckle slide (7-6), the third buckle slide (7-8), and the fourth buckle slide (7-9).
5. The press-to-release pen according to claim 3, characterized in that, A second protrusion (8-2) is provided below the first protrusion (8-1) on the sliding buckle (8). When the first protrusion (8-1) is located at the uppermost end of the second buckle slide (7-6) or at the uppermost end of the fourth buckle slide (7-9), the second protrusion (8-2) is limited by the upper side wall of the fourth buckle slide (7-9).
6. The press-to-release pen according to claim 5, characterized in that, The switch clamp (5) is provided with a buckle hole (5-4). The buckle hole (5-4) has a first support surface (5-6) and a limiting step surface (5-5) on its wall. The limiting step surface (5-5) is higher than the first support surface (5-6). The first support surface (5-6) and the limiting step surface (5-5) correspond to the upper and lower ends of the first buckle slide (7-5), respectively. The lower end of the sliding buckle (8) is provided with a limiting post (8-4). The limiting post (8-4) is inserted into the buckle hole (5-4). The side of the limiting post (8-4) is provided with a second convex curved surface (8-6) and a limiting surface (8-5). The second convex curved surface (8-6) can be rotatably fitted on the first support surface (5-6). The limiting surface (8-5) is fitted on the limiting step surface (5-5). The limiting step surface (5-5) limits the rotation of the sliding buckle (8) to one side of the limiting step surface (5-5).
7. The press-to-release pen according to claim 6, characterized in that, The lower end of the sliding buckle (8) is provided with a first convex surface (8-3) on the front side of the limiting post (8-4), and the switch clamp (5) is provided with a concave surface (5-7) on the front side of the buckle hole (5-4). The first convex surface (8-3) can be rotatably fitted in the concave surface (5-7).
8. The press-to-release pen according to claim 6, characterized in that, A second support surface (5-8) is provided on the side wall of the switch clamp (5), and the sliding buckle (8) is located on the side wall of the back of the first protrusion (8-1) and slides on the second support surface (5-8).
9. The press-to-release pen according to claim 6, characterized in that, The switch clamp (5) is provided with a pen tip hole (5-2) and a spring hole (5-3) that are both connected to the buckle hole (5-4). The pen tip (1-2) passes through the pen tip hole (5-2) from bottom to top and contacts the limiting surface (8-5). One end of the elastic element passes through the spring hole (5-3) from top to bottom and contacts the limiting post (8-4).
10. The press-to-release pen according to claim 1, characterized in that, The switch chuck (5) is provided with a sliding protrusion (5-9), and the self-locking housing (7) is provided with a chuck slide (7-4). The sliding protrusion (5-9) is slidably connected in the chuck slide (7-4). When the switch chuck (5) slides in the self-locking housing (7), the chuck slide (7-4) guides and limits the sliding protrusion (5-9).