Refill sleeve, refill and pressing type pen
By using an elastic refill cover in a push-type pen, the problem of refill shaking is solved and a stable writing effect of the pen tip is achieved.
Patent Information
- Application Number
- CN202422864685.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-11-22
AI Technical Summary
The refill of the existing snap-action pen tends to shake when the refill is ejected, which affects the writing effect.
A hollow cylindrical refill sleeve is designed, which has an elastic support section and a guide part. It forms a radial compression fit with the core outlet hole of the pen barrel to reduce shaking, and adapts to manufacturing process errors through elastic contact between the elastic support section and the inner wall of the core outlet hole.
It improves the stability of the pen tip, reduces shaking, and improves writing effect.
Smart Images
Figure CN223395966U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of writing tools, in particular to a refill sleeve, a refill and a push-type writing tool. Background Art
[0002] A push-type pen is a pen that can control the pen tip (i.e. the front end of the pen core) to extend or retract from the front end of the pen barrel by pressing an operating button at the rear end of the pen. This type of pen usually includes a pen barrel, a pen core, a spring, a telescopic locking mechanism, an operating button and other components. A core outlet hole is provided at the front end of the pen barrel, and the pen core, spring and telescopic locking mechanism are housed in the pen barrel. The operating button is set at the rear end of the pen barrel, and the spring is set at the front end of the pen core to drive the pen core to reset backward. The telescopic locking mechanism is set at the rear end of the pen core and cooperates with the operating button to drive the pen core to move in the core-out direction and maintain it, or to unlock the pen core so that it can be driven by the spring to move in the core-retracting direction.
[0003] Traditional refills suitable for these push-action pens typically consist of a nib and an ink tube. The nib includes a writing core and a connector. The connector connects between the writing core and the ink tube, supporting the writing core and transferring ink. The connector typically has a conical structure, with a connector and an annular flange at its rear end. The connector engages with the front end of the ink tube's inner bore, the rear end of the annular flange engages with the front end of the ink tube, and the front end of the annular flange typically engages and supports the spring.
[0004] In order to avoid interference between the nib and the pen holder, ensure that the nib can move smoothly, and also to avoid errors caused by limitations in the manufacturing process, the diameter of the core hole at the front end of the pen holder is usually designed to be much larger than the width of the nib. This also leads to a large gap between the nib and the inner wall of the core hole (generally refers to the gap between the connecting seat and the inner wall of the core hole) when the core is ejected in the existing push-type pen. This makes the nib of the pen easily shake to a large extent when writing, affecting the writing effect. Summary of the Invention
[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a refill cover which can prevent the front end of the refill of a push-type writing instrument from shaking when the refill is in the ejected state.
[0006] The refill sleeve of the present invention is a cylindrical structure with a hollow interior. The refill sleeve has an inner hole for accommodating a refill adapter. The front and rear ends of the refill sleeve are both provided with through holes connected to the inner hole. The through holes are used to be sleeved on the outside of the refill adapter and can form a radial limit fit therewith. The front portion of the refill sleeve has an elastic support section. The elastic support section has an elastic deformation ability to shrink radially inward toward the refill. The elastic support section can be inserted into the refill hole of the pen shaft as the refill moves and form a radial compression fit with the inner wall of the refill hole, thereby reducing the gap between the inner wall of the refill hole and the pen tip, reducing the shaking of the pen tip, and improving the stability of the pen tip when writing, thereby improving the writing effect. In addition, since there is elastic compression contact between the refill sleeve and the inner wall of the refill hole, it can play an adaptive role to overcome the influence of manufacturing process errors.
[0007] Furthermore, the outer side of the rear end of the pen core sleeve has an annular flange protruding outward in all directions, and the annular flange is used to abut and cooperate with the spring that drives the pen core to return backward.
[0008] Furthermore, the front part of the refill cover also has a conical guide portion, which is located in front of the elastic support section. When the refill cover moves in the core-out direction, the guide portion guides the elastic support section of the refill cover to be inserted into the core-out hole of the pen shaft, avoiding jamming and making the core-out smoother.
[0009] Furthermore, the guide portion is a conical surface or an arcuate surface arranged on the outer side of the front end of the refill sleeve, which has a simple structure and is convenient for production and processing.
[0010] Furthermore, a plurality of through grooves are evenly distributed along the circumference of the elastic support section. The provision of the through grooves can improve the elastic deformation effect of the elastic support section inward in the radial direction. Improving the elastic deformation effect is also beneficial to preventing jamming between the refill sleeve and the core outlet hole, thereby improving the core shrinkage effect.
[0011] Furthermore, the front end of the refill sleeve has a convex wall extending radially inward, and the through hole at the front end of the refill sleeve is opened at the center of the convex wall. The convex wall can cooperate with the connecting seat to form radial support for it, thereby reducing its radial shaking.
[0012] Furthermore, a plurality of protrusions are circumferentially distributed on the inner wall of the through hole at the front end of the refill sleeve to improve the abutment and fit effect with the connecting seat and reduce the influence of machining accuracy errors.
[0013] The utility model also provides a pen core used in a push-type pen, which is not prone to shaking when the pen is in a core-out state.
[0014] The pen core of the utility model comprises a pen tip and an ink tube. The pen tip comprises a writing core and a connecting seat. The connecting seat is connected between the writing core and the ink tube. In addition, the pen core sleeve is sleeved and fixed on the outer side of the connecting seat.
[0015] The utility model also provides a push-type pen which is not prone to shaking when the pen is in the ejected state.
[0016] The push-type writing instrument of the present invention comprises a pen barrel, a refill arranged on the inner side of the pen barrel, a telescopic locking mechanism, a spring and an operating button arranged on the outer side of the pen barrel, wherein the spring, the refill, the operating button and the telescopic locking mechanism form a linkage cooperation, and by alternately pressing the operating button, the refill can be driven to extend and remain in the refill-out state or to retract into the pen barrel, respectively. The refill comprises a nib and an ink tube, the nib comprises a writing refill and a connecting seat, the connecting seat is connected between the writing refill and the ink tube, the pen barrel comprises a refill-out hole, and further comprises the above-mentioned refill sleeve, the refill sleeve is sleeved on the outer side of the connecting seat at the front end of the refill, and forms a limiting cooperation with the pen barrel to prohibit the refill sleeve from moving backward relative to the refill and prohibiting radial relative movement. The spring is arranged between the pen barrel and the refill sleeve, and the refill sleeve is pressed and maintained at the front end of the refill by the spring, so that the refill sleeve and the refill can achieve synchronous telescopic movement, and the elastic supporting section of the refill sleeve and the refill-out hole of the pen barrel form a radially pressing cooperation.
[0017] Furthermore, the inner end of the core outlet hole has a guide cone surface, which can guide the pen core sleeve to be inserted into the core outlet hole to reduce jamming.
[0018] The beneficial effects of the utility model are: simple structure, easy assembly, and when the core is out of the core, it is located between the inner wall of the core hole and the core connecting seat, which can limit and support the pen tip in the radial direction, reduce the shaking of the pen tip, and thus improve the writing effect of the pen. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural diagram of a refill sleeve according to an embodiment of the present utility model;
[0020] Figure 2 A cross-sectional view of a refill sleeve according to an embodiment of the present invention;
[0021] Figure 3 This is a disassembled schematic diagram of the refill sleeve, spring, and refill of an embodiment of the utility model;
[0022] Figure 4 This is a schematic diagram of the assembly of the refill sleeve and the refill according to an embodiment of the utility model;
[0023] Figure 5 This is a partial schematic diagram of an embodiment of the utility model in a core-retracted state;
[0024] Figure 6 This is a partial schematic diagram of an embodiment of the present invention in a core-out state;
[0025] Figure 7 It is a partial cross-sectional view of an embodiment of the utility model in a core-retracted state;
[0026] Figure 8 It is a partial cross-sectional view of an embodiment of the present invention in the core-out state. DETAILED DESCRIPTION
[0027] Taking a push-type pen as an example, the specific structure of the push-type pen of the embodiment of the present invention is as follows: Figure 1-8 As shown, it includes a pen body 1, a refill 2 arranged on the inner side of the pen body 1, a telescopic locking mechanism (not shown), a spring 3 and an operating button (not shown) arranged on the outer side of the pen body 1, wherein the spring 3 is arranged between the front end of the refill 2 and the pen body 1, and is used to drive the refill 2 to move in the retracting direction. The spring 3, the refill 2, the operating button and the telescopic locking mechanism form a linkage cooperation. By alternately pressing the operating button, the refill 2 can be driven to extend and remain in the refill-out state or to retract into the pen body 1. The specific structure and implementation principle of the spring 3, the refill, the operating button and the telescopic locking mechanism belong to the well-known technology and are not repeated here. The refill 2 includes a nib and an ink tube 21. The nib includes a writing core 22 and a connecting seat 23. The connecting seat 23 is connected between the writing core 22 and the ink tube 21. The pen body 1 includes a core outlet hole 10.
[0028] In addition, the push-type writing tool also includes a core sleeve 4, such as Figure 1 、 Figure 4 As shown, the refill sleeve 4 is a hollow cylindrical structure. The refill sleeve 4 has an inner hole 40 for accommodating the refill adapter 23. The front and rear ends of the refill sleeve 4 are both provided with through holes (401, 402) connected to the inner hole 40. The through holes (401, 402) are used to be sleeved on the outside of the refill adapter 23 and can form a radial limit fit therewith (such as Figure 3 、 Figure 7 、 Figure 8 As shown in the state), the front portion of the refill sleeve 4 has an elastic support section 41, which has the elastic deformation ability to contract radially inwardly toward the refill 2. The elastic support section 41 can be inserted into the core hole 10 of the pen shaft 1 when the refill 2 is ejected and form a radially tight fit with the inner wall of the core hole 10 (as shown in the state). Figure 6 、 Figure 8In the state shown, to enhance the elastic deformation effect of the elastic support section 41, a certain gap is left between it and the connecting seat 23. This can reduce the gap between the inner wall of the core outlet hole 10 and the pen tip (i.e., the connecting seat 23), reduce the shaking of the pen tip, and improve the stability of the pen tip during writing, thereby improving the writing effect. In addition, the elastic and pressing contact between the refill sleeve 4 and the inner wall of the core outlet hole 10 can achieve an adaptive effect, thereby overcoming the influence of manufacturing process errors.
[0029] The outer side of the rear end of the refill sleeve 4 has an annular flange 42 protruding outward in all directions. The annular flange 42 is used to abut and cooperate with the spring 3 that drives the refill 2 to return backward. The abutting and cooperating state of the annular flange 42 and the spring 3 is as shown in FIG. Figure 7 、 Figure 8 shown.
[0030] In this embodiment, the refill sleeve 4 is sleeved onto the outside of the connecting seat 23 at the front end of the refill 2 and forms a position-limiting fit with the refill 2 to prevent the refill sleeve 4 from moving backward and radially relative to the refill 2. That is, when the refill 2 moves forward, it also pushes the refill sleeve 4 forward. The spring 3 is disposed between the pen barrel 1 and the refill sleeve 4, and the spring 3 compresses and holds the refill sleeve 4 at the front end of the refill 2, enabling synchronized telescopic movement of the refill sleeve 4 and the refill 2, and facilitating removal and replacement of the refill 2. In other embodiments, the refill sleeve 4 can be directly sleeved and fixed onto the outside of the connecting seat 23 by means of a snap-fit or other method, so that the refill sleeve 4 becomes part of the refill 2.
[0031] In this embodiment, the front portion of the refill sleeve 4 further comprises a tapered guide portion 43, located in front of the elastic support section 41. This guide portion 43 guides the elastic support section 41 of the refill sleeve 4 into the refill outlet 10 of the pen holder 1 as the refill sleeve 4 moves in the direction of refill discharge, thereby preventing any jamming and facilitating smoother refill discharge. The guide portion 43 is a curved surface disposed on the outside of the front end of the refill sleeve 4, offering a simple structure and convenient manufacturing and processing. In other embodiments, a tapered surface may also be employed.
[0032] A guide cone 101 is provided at the inner end of the core outlet hole 10 of the pen body 1. The guide cone 101 can also guide the pen core sleeve 4 to be inserted into the core outlet hole 10 to reduce jamming.
[0033] The elastic support section 41 is provided with a plurality of through grooves 44 evenly distributed along the circumferential direction. The provision of the through grooves 44 can improve the elastic deformation effect of the elastic support section 41 inward in the radial direction. Improving the elastic deformation effect is also beneficial to preventing jamming between the refill sleeve 4 and the core outlet hole 10, thereby improving the core shrinking effect.
[0034] The front end of the refill sleeve 4 has a radially inwardly extending convex wall 45. A through hole 401 located at the front end of the refill sleeve 4 is located at the center of the convex wall 45. The convex wall 45 cooperates with the connecting seat 23 to provide radial support thereto, reducing radial wobbling. The provision of the convex wall 45 also helps maintain a larger gap between the connecting seat 23 and the inner wall of the elastic support section 41, thereby enhancing the elastic deformation effect of the elastic support section 41.
[0035] A plurality of protrusions 46 are circumferentially distributed on the inner wall of the through hole 401 at the front end of the refill sleeve 4 to improve the abutment and fit effect with the connecting seat 23 and reduce the influence of machining accuracy errors.
[0036] The above embodiment is only one preferred embodiment of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.
Claims
1. A refill sleeve, characterized by: It is a cylindrical structure with a hollow interior. The refill sleeve has an inner hole for accommodating the refill connector. The front and rear ends of the refill sleeve are provided with through holes connected to the inner hole. The through holes are used to be sleeved on the outside of the refill connector and can form a radial limit fit with it. The front part of the refill sleeve has an elastic support section. The elastic support section has the elastic deformation ability to shrink radially inward toward the direction of the refill. The elastic support section is used to form a radial compression fit with the inner wall of the core outlet hole of the pen barrel.
2. The refill sleeve according to claim 1, characterized in that: The outer side of the rear end of the pen core sleeve is provided with an annular flange protruding outward in all directions.
3. The refill sleeve according to claim 1, wherein: The front portion of the refill sleeve also has a tapered guide portion, which is located in front of the elastic support section and is used to guide the elastic support section to be inserted into the core outlet hole of the pen holder.
4. The refill sleeve according to claim 3, wherein: The guide portion is a tapered surface or an arcuate surface arranged on the outer side of the front end of the pen core sleeve.
5. The refill sleeve according to claim 1, characterized in that: The elastic support section is provided with a plurality of through grooves evenly distributed along the circumferential direction.
6. The refill sleeve according to claim 1, wherein: The front end of the pen core sleeve is provided with a convex wall extending radially inwards, and the through hole located at the front end of the pen core sleeve is opened at the center of the convex wall.
7. The refill sleeve according to claim 6, characterized in that: A plurality of protrusions are distributed along the circumferential direction on the inner wall of the through hole at the front end of the pen core sleeve.
8. A pen refill comprising a nib and an ink tube, wherein the nib comprises a writing core and a connecting seat, wherein the connecting seat is connected between the writing core and the ink tube, characterized in that: It also includes a refill sleeve as described in any one of claims 1 to 7, wherein the refill sleeve is sleeved and fixed on the outside of the connecting seat.
9. A push-type pen, comprising a pen holder, a pen core arranged inside the pen holder, a telescopic locking mechanism, a spring, and an operating button arranged outside the pen holder, wherein: The spring, the refill, the operating button and the telescopic locking mechanism form a linkage cooperation. The refill includes a pen tip and an ink tube. The pen tip includes a writing refill and a connecting seat. The connecting seat is connected between the writing refill and the ink tube. The pen shaft includes a core outlet hole. It is characterized in that: it also includes a refill sleeve as described in any one of claims 1 to 7, the refill sleeve is sleeved on the outside of the connecting seat at the front end of the refill, and forms a limiting cooperation with the refill to prohibit the refill sleeve from moving backward relative to the refill and prohibiting radial relative movement. The spring is arranged between the pen shaft and the refill sleeve, and the refill sleeve and the refill move synchronously. The elastic support section of the refill sleeve and the core outlet hole of the pen shaft form a radial compression fit.
10. The push-type writing instrument according to claim 9, characterized in that: The inner end of the core outlet hole is provided with a guiding cone surface.