A detachable stylus tip for a capacitive stylus

Abstract

The utility model discloses a kind of detachable pen head for capacitor pen, it is related to pen head technical field, including conductive pen head, elastic member, pen head connecting sleeve, pen barrel main body, connecting sleeve end cover and clamping assembly;The first end of the pen head connecting sleeve is detachably connected with the pen barrel main body, the second end of the pen head connecting sleeve is fixedly connected with the connecting sleeve end cover;The conductive pen head is arranged in the elastic member, and one end of the conductive pen head extends to the inside of the pen head connecting sleeve and abuts with conductive contact piece, in the present application, the cooperation structure design of clamping assembly (clamping block, clamping groove) and elastic member, both can realize the quick disassembly and assembly of conductive pen head (without the aid of tool), and the pre-tightening force of elastic member can keep the continuous abutment of conductive pen head and conductive contact piece, guarantee the stable conduction of electric signal in touch process, simplify the replacement operation step simultaneously, effectively reduce the use and maintenance cost of capacitor pen.

Description

Technical Field

[0001] This utility model relates to the field of pen tip technology, and in particular to a detachable pen tip for a capacitive pen. Background Technology

[0002] Most capacitive pen tips on the market currently use an integrated or simple snap-on structure, which has the following drawbacks:

[0003] Firstly, the capacitive pen requires complete replacement of the entire pen after the integrated pen tip wears out, resulting in higher usage costs.

[0004] Secondly, the connection structure of some detachable pen tips is complex, requiring tools for disassembly, making the operation cumbersome.

[0005] Third, some detachable pen tips lack a stable elastic pre-tightening structure, and the contact between the conductive pen tip and the internal circuit is prone to loosening, resulting in intermittent or malfunctioning touch signals;

[0006] Meanwhile, most detachable pen tips lack a sealed design at the connection gaps, allowing dust and liquids to easily penetrate and affect the lifespan of the capacitive pen. Utility Model Content

[0007] Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this utility model provides a detachable pen tip for capacitive pens, solving the technical problems of high replacement costs for integrated capacitive pen tips, cumbersome operation of detachable tips, easy interruption of touch signals, and lack of sealing in connection gaps leading to easy intrusion of dust or liquids.

[0009] Technical solution

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A detachable pen tip for a capacitive pen includes a conductive pen tip, an elastic element, a pen tip connecting sleeve, a pen body, a connecting sleeve end cap, and a snap-fit ​​assembly. A first end of the pen tip connecting sleeve is detachably connected to the pen body, and a second end of the pen tip connecting sleeve is fixedly connected to the connecting sleeve end cap. The conductive pen tip passes through the elastic element, with one end extending into the pen tip connecting sleeve and abutting against a conductive contact. Both ends of the elastic element elastically abut against the stepped structure of the conductive pen tip and the inner wall of the connecting sleeve end cap, respectively. The snap-fit ​​assembly is disposed in a snap-fit ​​mating area A between the connecting sleeve end cap and the conductive pen tip. The snap-fit ​​assembly includes a snap-fit ​​block disposed on the outside of the conductive pen tip and a snap-fit ​​groove disposed on the inside of the connecting sleeve end cap. The snap-fit ​​block and the snap-fit ​​groove engage to achieve detachable assembly of the conductive pen tip and the pen tip connecting sleeve.

[0012] Preferably, the elastic element is a return spring, which is coaxially sleeved on the outside of the conductive pen tip, and the inner diameter of the return spring is adapted to the outer diameter of the rod of the conductive pen tip. A limiting protrusion is provided on the inner sidewall of the snap-fit ​​groove, and a matching limiting groove is provided on the sidewall of the snap-fit ​​block corresponding to the limiting protrusion. The limiting protrusion and the limiting groove are fitted together to restrict the circumferential rotation of the conductive pen tip relative to the connecting sleeve end cap.

[0013] Preferably, the conductive contact is fixedly disposed inside the pen tip connecting sleeve near one end of the pen body. One end of the conductive contact is in contact with the conductive pen tip for electrical communication, and the other end of the conductive contact is used for electrical connection with the circuit module inside the pen body. A sealing ring is provided at the connection position between the pen tip connecting sleeve and the pen body. The inner sidewall of the sealing ring fits against the outer sidewall of the pen tip connecting sleeve, and the outer sidewall of the sealing ring fits against the inner sidewall of the pen body to achieve sealing of the connection gap.

[0014] Preferably, an auxiliary return spring is also provided in the snap-fit ​​groove. One end of the auxiliary return spring is fixedly connected to the bottom of the snap-fit ​​groove, and the other end elastically abuts against the end face of the snap-fit ​​block to assist the snap-fit ​​block in disengaging from the snap-fit ​​groove. The conductive pen tip is made of conductive silicone material, and the conductive contact is made of conductive copper alloy material.

[0015] The beneficial effects of the technical solutions provided in this application include at least the following:

[0016] In this new invention, the cooperative structure design of the snap-fit ​​component (snap-fit ​​block, snap-fit ​​groove) and the elastic element enables quick disassembly and assembly of the conductive pen tip (without the aid of tools), and the pre-tightening force of the elastic element maintains continuous contact between the conductive pen tip and the conductive contact, ensuring stable conduction of electrical signals during touch control. At the same time, it simplifies the replacement operation steps and effectively reduces the usage and maintenance costs of the capacitive pen. Attached Figure Description

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is a structural diagram of the entire utility model;

[0019] Figure 2 This is a structural diagram of the main body of the pen barrel of this utility model;

[0020] Figure 3 This is a structural diagram of the pen tip connecting sleeve of this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged view of the structure at point A.

[0022] Legend: 1. Auxiliary reset spring; 2. Limiting protrusion; 3. Snap-fit ​​groove; 4. Snap-fit ​​block; 5. Connecting sleeve end cap; 6. Conductive contact; 7. Conductive pen tip; 8. Elastic element; 9. Sealing ring; 10. Pen tip connecting sleeve; 11. Pen body. Detailed Implementation

[0023] This application provides a detachable pen tip for a capacitive pen, which effectively solves the technical problems of existing capacitive pen tips, such as high replacement cost of integrated structure, cumbersome operation of detachable structure, easy interruption of touch signal, and lack of sealing of connection gaps leading to easy intrusion of dust or liquid.

[0024] Example

[0025] like Figure 1 - Figure 4 As shown, the technical solution in this application aims to effectively solve the technical problems of existing capacitive pen tips, such as high replacement cost of integrated structure, cumbersome operation of detachable structure, easy interruption of touch signal, and lack of sealing of connection gaps leading to easy intrusion of dust or liquid. The overall idea is as follows:

[0026] To address the problems existing in the prior art, this utility model provides a detachable pen tip for a capacitive pen. The detachable pen tip for a capacitive pen disclosed in this embodiment is used to achieve convenient disassembly and replacement of the pen tip and stable touch control. Its structure and assembly process are as follows:

[0027] Component composition and structural details

[0028] This pen tip mainly includes: a conductive pen tip 7, an elastic element 8, a pen tip connecting sleeve 10, a pen body 11, a connecting sleeve end cap 5, a conductive contact element 6, a sealing ring 9, and a snap-fit ​​assembly (including a snap-fit ​​block 4, a snap-fit ​​groove 3, a limiting protrusion 2, and an auxiliary reset spring 1).

[0029] The connection relationships of each component are as follows:

[0030] Pen body 11 and pen tip connecting sleeve 10: The two are connected by a threaded detachable connection. A sealing ring 9 is fitted at the connection position. The sealing ring 9 fits the outer wall of the pen tip connecting sleeve 10 and the inner wall of the pen body 11 at the same time, so as to achieve dustproof and liquid-proof sealing of the connection gap.

[0031] Pen tip connecting sleeve 10 and connecting sleeve end cap 5: The connecting sleeve end cap 5 is fixed to the end of the pen tip connecting sleeve 10 by interference fit, together forming the receiving cavity of the pen tip.

[0032] Conductive pen tip 7 and elastic element 8: The elastic element 8 is coaxially sleeved on the rod of the conductive pen tip 7. The rod of the conductive pen tip 7 has a stepped structure. One end of the elastic element 8 abuts against the step, and the other end abuts against the inner wall of the connecting sleeve end cap 5.

[0033] Conductive contact 6: It is fixed inside the pen tip connecting sleeve 10 near one end of the pen body 11. One end of it is electrically connected to the circuit module inside the pen body 11, and the other end abuts against the end of the rod of the conductive pen tip 7 to ensure electrical conduction.

[0034] Snap-fit ​​assembly: A snap-fit ​​block 4 is integrally formed on the outer side of the snap-fit ​​mating area A—the conductive pen tip 7. A snap-fit ​​groove 3 is correspondingly opened on the inner side of the connecting sleeve end cap 5. A limiting protrusion 2 is provided on the inner wall of the snap-fit ​​groove 3, and a matching limiting groove is provided on the side wall of the snap-fit ​​block 4. The two fit together to restrict the circumferential rotation of the conductive pen tip 7. An auxiliary reset spring 1 is also fixed at the bottom of the snap-fit ​​groove 3, and its other end abuts against the end face of the snap-fit ​​block 4.

[0035] The conductive contact 6 is fixed to the corresponding mounting position inside the pen tip connecting sleeve 10;

[0036] The elastic element 8 is fitted onto the rod of the conductive pen tip 7, so that one end of the elastic element abuts against the stepped structure of the conductive pen tip.

[0037] Insert the conductive pen tip with the elastic element into the end cap 5 of the connecting sleeve, align the snap-fit ​​block 4 with the snap-fit ​​groove 3 and push it in until the snap-fit ​​block and the snap-fit ​​groove are engaged and the limiting protrusion 2 is embedded in the limiting groove (at this time, the elastic element and the auxiliary reset spring 1 are both in a pre-compressed state).

[0038] Secure the end cap 5 of the pen tip connector to the end of the pen tip connector 10;

[0039] Connect the pen tip connecting sleeve 10 to the pen body 11 with threads to ensure that the sealing ring 9 fits and seals, and complete the overall assembly.

[0040] Working principle

[0041] When the capacitive pen is writing, the conductive pen tip 7 contracts into the pen tip connecting sleeve 10 under the pressure of the writing surface, and the elastic element 8 is further compressed to maintain elastic pre-tightness. During this process, the end of the conductive pen tip is always in contact with the conductive contact 6, which electrically connects the conductive pen tip to the circuit module inside the pen body 11, so that the conductive pen tip simulates the electrostatic signal of the human body and realizes the touch operation of the capacitive screen. After the writing pressure disappears, the reset force of the elastic element pushes the conductive pen tip back to the initial position.

[0042] When the conductive pen tip needs to be replaced, press the conductive pen tip 7 into the pen tip connecting sleeve 10 to further compress the auxiliary reset spring 1. At the same time, rotate the conductive pen tip to separate the limiting protrusion 2 from the limiting groove. Pull it outward to remove the conductive pen tip, along with the elastic element 8, from the connecting sleeve end cover 5. After replacing the new conductive pen tip, repeat the above assembly steps to complete the replacement. The operation is convenient and efficient.

[0043] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A detachable pen tip for a capacitive pen, comprising, characterized in that: It includes a conductive pen tip (7), an elastic element (8), a pen tip connecting sleeve (10), a pen body (11), a connecting sleeve end cap (5), and a snap-fit ​​assembly; the first end of the pen tip connecting sleeve (10) is detachably connected to the pen body (11), and the second end of the pen tip connecting sleeve (10) is fixedly connected to the connecting sleeve end cap 5. The conductive pen tip (7) is inserted into the elastic member (8), and one end of the conductive pen tip (7) extends into the pen tip connecting sleeve (10) and abuts against the conductive contact member (6). The two ends of the elastic member (8) are elastically abutted between the stepped structure of the conductive pen tip (7) and the inner wall of the connecting sleeve end cap (5). The snap-fit ​​assembly is disposed in the snap-fit ​​area A between the connecting sleeve end cap (5) and the conductive pen tip (7). The snap-fit ​​assembly includes a snap-fit ​​block (4) disposed on the outside of the conductive pen tip (7) and a snap-fit ​​groove (3) disposed on the inside of the connecting sleeve end cap (5). The snap-fit ​​block (4) and the snap-fit ​​groove (3) engage to realize the detachable assembly of the conductive pen tip (7) and the pen tip connecting sleeve (10).

2. The detachable pen tip for a capacitive pen according to claim 1, characterized in that, The elastic element (8) is a reset spring, which is coaxially sleeved on the outside of the conductive pen tip (7), and the inner diameter of the reset spring is adapted to the outer diameter of the rod of the conductive pen tip (7).

3. A detachable pen tip for a capacitive pen according to claim 2, characterized in that, The inner sidewall of the snap-fit ​​groove (3) is provided with a limiting protrusion (2), and the sidewall of the snap-fit ​​block (4) is provided with a matching limiting groove corresponding to the limiting protrusion (2). The limiting protrusion (2) and the limiting groove are fitted together to restrict the circumferential rotation of the conductive pen tip (7) relative to the connecting sleeve end cap (5).

4. A detachable pen tip for a capacitive pen according to claim 3, characterized in that, The conductive contact (6) is fixedly disposed inside the pen tip connecting sleeve (10) at one end near the pen body (11). One end of the conductive contact (6) is in contact with the conductive pen tip (7) and the other end of the conductive contact (6) is used to electrically connect with the circuit module inside the pen body (11).

5. A detachable pen tip for a capacitive pen according to claim 4, characterized in that, A sealing ring (9) is provided at the connection position between the pen tip connecting sleeve (10) and the pen body (11). The inner wall of the sealing ring (9) is in contact with the outer wall of the pen tip connecting sleeve (10), and the outer wall of the sealing ring (9) is in contact with the inner wall of the pen body (11) to achieve sealing of the connection gap.

6. A detachable pen tip for a capacitive pen according to claim 5, characterized in that, An auxiliary reset spring (1) is also provided in the snap-fit ​​groove (3). One end of the auxiliary reset spring (1) is fixedly connected to the bottom of the snap-fit ​​groove (3), and the other end is elastically abutted against the end face of the snap-fit ​​block (4) to assist the snap-fit ​​block (4) in disengaging from the snap-fit ​​groove (3).

7. A detachable pen tip for a capacitive pen according to claim 6, characterized in that, The conductive pen tip (7) is made of conductive silicone material, and the conductive contact (6) is made of conductive copper alloy material.

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