Low-noise pressing type pen
By placing the spring on the back of the pen holder and placing it on the outside of the refill ink tube, combined with the design of the refill support member and spring sleeve, the problem of noise and shaking of the refill in the movement of the refill is solved, and the further improvement is achieved Stable refill movement.
Patent Information
- Application Number
- CN202421074180.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-16
AI Technical Summary
The existing push-type pens are prone to noise and jitter during the extension and retraction movement of the refill, mainly due to the lateral deformation and unstable driving caused by the pre-tensioning configuration of the spring between the front end of the refill and the pen holder.
The spring driving the retracted movement of the refill is arranged at the back of the pen holder and is placed on the outside of the ink tube of the refill. Through the design of the refill support member and spring sleeve, the gap between the spring and the ink tube of the refill is reduced. , improve the stability and force application of springs, reduce noise and jitter.
It effectively reduces the noise and jitter of the refill during telescopic movement, improves the working stability of the spring, does not require modification of the existing refill structure, and is adapted to conventional refills for easy replacement.
Smart Images
Figure CN222246647U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a low-noise pressing type writing tool. Background Art
[0002] In the prior art, a push-type writing instrument, such as an automatic ballpoint pen, uses a pressing method to achieve the extension and retraction of the pen core. It generally includes components such as a pen barrel, a pen core, a spring, a button, and a telescopic locking mechanism. The pen core, spring, and telescopic locking mechanism are built into the inner side of the pen barrel. The spring is arranged between the front end of the pen core and the pen barrel, and the telescopic locking mechanism is arranged between the front end of the button and the rear end of the pen core. The extension movement of the pen core relies on the pushing force when the hand presses the button, and the retraction movement of the pen core relies on the elastic force when the spring is reset. By pressing and releasing the button, the front end of the pen core can be switched to extend forward or retract backward from the core outlet hole.
[0003] The spring is usually pre-tightened and arranged between the front end of the pen core and the pen barrel. Since the rear end of the pen core is usually fixed and the front end of the pen core is floating, and there is a large gap between the spring and the front end of the pen core and between the spring and the inner hole wall of the pen barrel, the front end of the pen core is prone to deflection when it is extended, and the spring is prone to lateral deformation when it is compressed by the pen core. The spring is prone to noise and jitter when it is squeezed. Summary of the invention
[0004] The utility model provides a low-noise push-type pen, wherein a spring for driving a pen core to retract is arranged at the rear of the pen, and when the pen core is operated to retract, there is less noise and vibration.
[0005] The utility model provides a low-noise push-type writing tool, comprising a pen holder, a pen core arranged in the pen holder axially and movable along the pen holder, and a telescopic locking mechanism and a spring which are linked with the pen core to realize telescopic movement. The rear part of the pen core comprises a straight-cylindrical ink tube, a pen core supporting component is linked between the telescopic locking mechanism and the rear end of the pen core, the pen core supporting component is movable in the pen holder axially, the spring is sleeved on the ink tube of the pen core and abuts between the pen holder and the pen core supporting component, the spring is used to drive the pen core supporting component to move backward, and when the telescopic locking mechanism drives the pen core to move in the extending direction, the pen core is pushed to move through the pen core supporting component, and the spring is compressed to store energy at the same time; when the telescopic locking mechanism drives the pen core to move in the retracting direction, the pen core is pushed to move through the pen core supporting component by the spring.
[0006] The spring for driving the retraction movement of the pen core is arranged at the rear of the pen shaft and is sleeved on the outside of the pen core ink tube. The gap between the spring and the pen core ink tube is relatively small and relatively uniform. In addition, since the rear end of the pen core is the supporting end, it is not easy to shake relative to the front end of the pen core. The spring is more stably stressed during compression deformation and is not easy to produce lateral deformation. It is not easy to produce noise and jitter when squeezed. In addition, this improvement method does not require changes to the existing pen core structure, can be adapted to pen cores of conventional structure, and is more conducive to the replacement and use of pen cores.
[0007] Furthermore, a sliding contact is formed between the side of the core support component and the inner hole wall of the pen barrel, which can reduce the shaking of the core support component, thereby improving the force coordination effect between the core support component and the spring, and further reducing the possibility of noise and shaking when the spring is working.
[0008] Furthermore, the front end of the refill support member is provided with a slot which is plugged and fixed with the rear end of the ink tube of the refill, which has a simple structure and is easy to install, so that the refill support member and the refill are reliably connected together.
[0009] Furthermore, a first annular step surface is provided at the rear of the inner hole of the pen shaft, and the two ends of the spring respectively form abutment cooperation with the first annular step surface and the front end of the pen core supporting member, so that the structure is compact and the spring works more reliably.
[0010] Furthermore, an annular positioning groove is provided on the front end and / or the first annular step surface of the pen core support member, and the end of the spring is embedded in the annular positioning groove for positioning, thereby preventing the end of the spring from lateral deviation and making the spring work more reliable.
[0011] Furthermore, a spring sleeve is arranged between the front end of the pen core and the pen shaft, and the spring sleeve is arranged between the inner hole wall of the pen shaft and the side of the front end of the pen core. A second annular step surface is arranged at the front end of the pen core, and a third annular step surface is arranged at the front part of the inner hole of the pen shaft. The axial ends of the spring sleeve are respectively abutted and limited with the second annular step surface and the third annular step surface.
[0012] The setting of the spring sleeve can keep the front end of the pen core in a centered position, so that the front end of the pen core is not easily deflected during the telescopic movement. When the pen core is extended, the spring sleeve will be compressed and deformed, and when the pen core is retracted, the spring sleeve will recover its deformation. Since the gap between the spring sleeve and the pen core and between the spring sleeve and the inner hole wall of the pen shaft is small, the spring sleeve is not easy to produce lateral deformation during the compression process, and is not easy to produce shaking and abnormal noise.
[0013] Furthermore, a conical hole wall is provided adjacent to the third annular step surface at the front of the inner hole of the pen shaft, and a conical matching surface for contacting and matching with the conical hole wall is provided at the front end of the spring sleeve. The spring sleeve is not easy to shake due to the guiding matching between the conical hole wall at the front of the inner hole of the pen shaft and the conical matching surface at the front end of the spring sleeve, and the front end of the pen core is more stable.
[0014] Further, the spring sleeve comprises a circular inner peripheral wall and a circular outer peripheral wall, and a plurality of V-shaped notches are arranged at intervals along the axial direction on opposite sides of the spring sleeve, and the V-shaped notches on both sides of the spring sleeve are arranged in a staggered distribution along the axial direction. In another preferred embodiment, the spring sleeve can be a spiral structure.
[0015] Furthermore, the spring sleeve is made of plastic material, which is more conducive to the production and processing of the spring sleeve, and will not generate large noise even when it is squeezed and rubbed against the inner hole wall of the pen holder during compression. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a structural diagram of an embodiment of the utility model;
[0017] Figure 2 It is an exploded view of an embodiment of the utility model;
[0018] Figure 3 A cross-sectional view of an embodiment of the utility model;
[0019] Figure 4 for Figure 3 A magnified view of part A;
[0020] Figure 5 for Figure 3 A magnified view of part B;
[0021] Figure 6 This is a structural diagram of a refill support component according to an embodiment of the utility model;
[0022] Figure 7 This is a structural diagram of a spring sleeve according to an embodiment of the utility model. DETAILED DESCRIPTION
[0023] The implementation of the low-noise click-type writing tool of the utility model is as follows: Figure 1-7As shown, it includes a pen barrel 1, a pen core 2 movably arranged in the pen barrel 1 along the axial direction of the pen barrel 1, a button 7 movably arranged at the rear end of the pen barrel 1, and also includes a telescopic locking mechanism 3 and a spring 4 that are linked to the pen core 2 to achieve telescopic movement. The rear part of the pen core 2 includes a straight cylindrical ink tube 21. A pen core supporting member 5 is linked between the front end of the telescopic locking mechanism 3 and the rear end of the pen core 2. The rear end of the telescopic locking mechanism 3 is linked to the button 7. The pen core supporting member 5 moves in the pen barrel 1 along the axial direction of the pen barrel 1. The spring 4 is sleeved on the ink tube 21 of the pen core 2. 1 and abuts between the pen holder 1 and the core support member 5. The spring 4 is used to drive the core support member 5 to move backward. When the retractable locking mechanism 3 drives the core 2 to move in the extending direction, it pushes the core 2 forward through the core support member 5, and compresses the spring 4 to store energy. When the retractable locking mechanism 3 drives the core 2 to move in the retracting direction, the spring 4 pushes the core 2 to move through the core support member 5. The retractable locking mechanism 3 is relatively common in existing push-type writing tools such as automatic ballpoint pens, and its specific structure and principle are not repeated here.
[0024] The spring 4 for driving the retracting movement of the pen core 2 is arranged at the rear of the pen body 1 and sleeved on the outside of the pen core ink tube 21. The gap between the spring 4 and the pen core ink tube 21 is relatively small and relatively uniform. Figure 4 And because the rear end of the ink tube 21 of the refill 2 is the supporting end (supported and fixed with the refill supporting member 5), it is not easy to shake relative to the front end of the refill 2, and the spring 4 is more stably stressed during compression deformation, and is not easy to produce lateral deformation, and is not easy to produce noise and jitter when squeezed. In addition, this improvement method does not require changes to the existing refill structure, can be adapted to refills of conventional structure, and is more conducive to the replacement and use of the refill 2.
[0025] The side of the refill support member 5 and the inner hole wall of the pen barrel 1 form a sliding contact fit, which can reduce the shaking of the refill support member 5, thereby also improving the force matching effect between the refill support member 5 and the spring 4, further reducing the possibility of noise and shaking generated by the spring 4 when working.
[0026] In this embodiment, if Figure 6 As shown, the refill support member 5 includes a base 51 and a rubber ring 52 arranged on the outer peripheral surface of the base 51. The setting of the rubber ring 52 can reduce the requirements for tolerance matching between components, improve the sliding contact effect between the refill support member 5 and the refill support member 5, and make the refill support member 5 less likely to shake. In addition, the rubber ring 52 can also provide damping, slow down the movement speed of the refill support member 5 and the refill 2, thereby reducing the impact of the refill 2 during retraction movement, reducing noise, and making it less likely for the ink in the refill 2 to overflow or be unevenly distributed.
[0027] The front end of the refill support member 5 is provided with a slot 53 which is plugged and fixed with the rear end of the ink tube 21 of the refill 2. The slot 53 is provided with a positioning rib 54 which can clamp and position the ink tube 21 of the refill 2. The structure is simple and the installation is convenient, so that the refill support member 5 and the refill 2 are reliably connected together.
[0028] A first annular step surface 11 is provided at the rear of the inner hole of the pen barrel 1, and the two ends of the spring 4 are respectively abutted against the first annular step surface 11 and the front end of the pen core support member 5, which has a compact structure and is easy to install, making the spring 4 work more reliably.
[0029] The front end of the refill support member 5 is provided with an annular positioning groove 55, and the rear end of the spring 4 is embedded in the annular positioning groove 55 to prevent the end of the spring 4 from lateral displacement, so that the spring 4 works more reliably. In other embodiments, an annular positioning groove that is embedded in the front end of the spring 4 can also be provided on the first annular step surface 11.
[0030] A spring sleeve 6 is arranged between the front end of the pen core 2 and the pen body 1. The spring sleeve 6 is padded between the inner hole wall of the pen body 1 and the front end side of the pen core 2. A second annular step surface 22 is arranged at the front end of the pen core 2. A third annular step surface 12 is arranged at the front part of the inner hole of the pen body 1. The axial ends of the spring sleeve 6 are respectively abutted and limited with the second annular step surface 22 and the third annular step surface 12.
[0031] The setting of the spring sleeve 6 can keep the front end of the pen core 2 in a centered position, so that the front end of the pen core 2 is not easily deflected during the telescopic movement. When the pen core 2 is extended, the spring sleeve 6 will be compressed and deformed, and when the pen core 2 is retracted, the spring sleeve 6 will recover its deformation accordingly. Since the gap between the spring sleeve 6 and the pen core 2 and between the spring sleeve 6 and the inner hole wall of the pen shaft 1 is small, the spring sleeve 6 is not easy to produce lateral deformation during the compression process, and is not easy to produce shaking and abnormal noise.
[0032] It should be noted that the spring sleeve 6 only serves to support and limit the front end of the pen core 2, so that the front end of the pen core 2 is not easily deflected. Although the spring sleeve 6 will also provide a backward elastic force for the pen core 2 when compressed, this elastic force is mainly used for the deformation reset of the spring sleeve 6, and the backward power of the pen core 2 relies on the spring 4.
[0033] The front part of the inner hole of the pen holder 1 is adjacently provided with a conical hole wall 13 around the third annular step surface 12, and the front end of the spring sleeve 6 is provided with a conical matching surface 61 that contacts and matches with the conical hole wall 13. The spring sleeve 6 is not easy to shake due to the guiding match between the conical hole wall 13 at the front part of the inner hole of the pen holder 1 and the conical matching surface 61 at the front end of the spring sleeve 6, and the front end of the pen core 2 is also more stable.
[0034] The spring sleeve 6 includes a circular inner peripheral wall 62 and a circular outer peripheral wall 63, which improves the contact and matching effect with the inner hole wall of the pen holder 1, so that the spring sleeve 6 is not easy to interfere with the front end of the pen core 2 when it is compressed and deformed. A plurality of V-shaped notches 64 are arranged at intervals along the axial direction on the opposite sides of the spring sleeve 6. The V-shaped notches 64 on both sides of the spring sleeve 6 are arranged in a staggered distribution along the axial direction. The arrangement of the V-shaped notches 64 can improve the elastic deformation effect of the spring sleeve 6. In other embodiments, the spring sleeve 6 can also adopt a spiral structure.
[0035] The spring sleeve 6 is made of plastic material, which is more conducive to the production and processing of the spring sleeve 6 and does not generate large noise during the compression process.
[0036] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.
Claims
1. A low-noise push-type writing tool, comprising a pen holder, a pen core arranged in the pen holder axially and movably, and also comprising a telescopic locking mechanism and a spring for linking the pen core to realize telescopic movement, and a straight-cylindrical ink tube at the rear of the pen core, characterized in that: A refill support component is provided in linkage between the telescopic locking mechanism and the rear end of the refill. The refill support component moves in the pen shaft along the axial direction of the pen shaft. The spring is sleeved on the ink tube of the refill and abuts between the pen shaft and the refill support component. The spring is used to drive the refill support component to move backward.
2. The low-noise click-action writing tool according to claim 1, characterized in that: The side portion of the core support component and the inner hole wall of the pen barrel form a sliding contact fit.
3. The low-noise click-action writing tool according to claim 1, characterized in that: The front end of the pen core supporting component is provided with a slot which is matched with the rear end of the ink tube of the pen core for insertion and fixing.
4. The low-noise click-action writing tool according to claim 1, characterized in that: A first annular step surface is arranged at the rear of the inner hole of the pen barrel, and the two ends of the spring are respectively in abutment with the first annular step surface and the front end of the pen core supporting component.
5. The low-noise click-action writing tool according to claim 4, characterized in that: An annular positioning groove is arranged on the front end and / or the first annular step surface of the pen core supporting member, and the end of the spring is fitted into the annular positioning groove for positioning.
6. The low-noise click-action writing tool according to claim 1, characterized in that: A spring sleeve is arranged between the front end of the pen core and the pen shaft, and the spring sleeve is arranged between the inner hole wall of the pen shaft and the side of the front end of the pen core. A second annular step surface is arranged at the front end of the pen core, and a third annular step surface is arranged at the front part of the inner hole of the pen shaft. The axial ends of the spring sleeve are respectively abutted and limited with the second annular step surface and the third annular step surface.
7. The low-noise click-type writing tool according to claim 6, characterized in that: A conical hole wall is arranged adjacent to the third annular step surface at the front part of the inner hole of the pen shaft, and a conical matching surface contacting and matching with the conical hole wall is arranged at the front end of the spring sleeve.
8. The low-noise click-type writing tool according to claim 6, characterized in that: The spring sleeve comprises a circular inner peripheral wall and a circular outer peripheral wall. A plurality of V-shaped notches are arranged at intervals along the axial direction on opposite sides of the spring sleeve. The V-shaped notches on the two sides of the spring sleeve are arranged in a staggered distribution along the axial direction.
9. The low-noise click-action writing tool according to claim 6, characterized in that: The spring sleeve is a spiral structure.
10. The low-noise click-type writing tool according to claim 6, characterized in that: The spring sleeve is made of plastic material.