Pressure-sensitive electronic pen with overvoltage protection

Abstract

An embodiment of the present invention discloses a pressure-sensitive electronic pen with overvoltage protection, which includes a pen body, a pressure sensor, a pen tip core rod, a pressure-bearing block, a pressure rod, and an elastic member. The pressure-bearing block is fixedly arranged inside the pen body, the pressure rod is correspondingly arranged in front of the pressure sensor, both ends of the elastic member are respectively connected to the pressure rod and the pen tip core rod, and a limiting portion is arranged at the end of the pen tip core rod, and the limiting portion is spaced from the pressure-bearing block by a preset distance. In the present invention, the writing pressure is transmitted to the pressure sensor through the elastic member. When the pressure is too large, the elastic member is compressed, and the pen tip core rod is blocked by the pressure-bearing block to prevent the pressure sensor from being damaged. The structure is simple, the assembly is convenient, and the cost is low. In addition, in the present invention, the pen tip core rod is limited by the pressure-bearing block to prevent the pen tip core rod from shaking during writing, thereby improving the writing feel.

Description

Technical Field

[0001] The present invention relates to the field of electronic pens, and particularly to a pressure-sensitive electronic pen with overvoltage protection. Background Art

[0002] Among existing electronic pens, many have a pressure sensing function, the purpose of which is to detect the pressure exerted on the pen tip when the user writes and feedback this pressure to the corresponding electronic device to achieve functions such as changing the thickness of the line.

[0003] Among existing pressure-sensitive electronic pens, some do not have an overvoltage protection function, and their pressure sensors are easily damaged; some have an overvoltage protection function, but the overvoltage protection structure is complex, the assembly cost is high, and the pen tip is prone to shaking during writing, affecting the writing feel. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a pressure-sensitive electronic pen with overvoltage protection to simplify the structure and reduce the cost.

[0005] To solve the above technical problem, an embodiment of the present invention provides a pressure-sensitive electronic pen with overvoltage protection, which includes a pen body, a pressure sensor, and a pen tip core rod, and further includes a pressure-bearing block, a pressure rod, and an elastic member. The pressure-bearing block is fixedly arranged in the pen body, the pressure rod is correspondingly arranged in front of the pressure sensor, both ends of the elastic member are respectively connected to the pressure rod and the pen tip core rod, and a limiting portion is arranged at the end of the pen tip core rod, and the limiting portion is spaced from the pressure-bearing block by a preset distance.

[0006] Further, a guiding hole is arranged in the pressure-bearing block, and a guiding column corresponding to be located in the guiding hole is arranged at the end of the pen tip core rod.

[0007] Further, a limiting column corresponding to be located in the guiding hole is arranged at the front end of the pressure rod.

[0008] Further, a preloading spring is further included, and the preloading spring acts on the pen tip core rod to apply a backward preloading force to the pen tip core rod.

[0009] Further, the elastic member is a return spring piece.

[0010] Further, the pressure-bearing block is arranged in the middle of the return spring piece.

[0011] Further, a main bracket arranged in the pen body is further included, and the pressure-bearing block is fixedly arranged on the main bracket.

[0012] The beneficial effects of the present invention are as follows: The present invention transmits the writing pressure to the pressure sensor through the elastic member. When the pressure is too large, the elastic member is compressed, and the pen tip core rod is blocked by the pressure-bearing block to prevent the pressure sensor from being damaged. The structure is simple, the assembly is convenient, and the cost is low; in addition, the present invention limits the pen tip core rod through the pressure-bearing block to prevent the pen tip core rod from shaking during writing and improves the writing feel. Brief Description of the Drawings

[0013] Figure 1 is a cross-sectional structure diagram of the pressure-sensitive electronic pen with overvoltage protection according to an embodiment of the present invention.

[0014] Figure 2 is an internal structure diagram of the pressure-sensitive electronic pen with overvoltage protection according to an embodiment of the present invention.

[0015] Figure 3 is a three-dimensional structure diagram of the elastic member according to an embodiment of the present invention.

[0016] Figure 4 is a three-dimensional structure diagram of the pressure-bearing block according to an embodiment of the present invention.

[0017] Figure 5 is a three-dimensional structure diagram of the nib core rod according to an embodiment of the present invention.

[0018] Figure 6 is a three-dimensional structure diagram of the pressure rod according to an embodiment of the present invention.

[0019] Description of the Reference Numerals in the Drawings

[0020] Pen body 1, pressure sensor 2, nib core rod 3, pressure-bearing block 4, pressure rod 5, elastic member 6, limiting portion 7, guiding hole 8, guiding column 9, limiting column 10, preloading spring 11, main bracket 12. Detailed Embodiments

[0021] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0022] In the embodiments of the present invention, if there are directional indications (such as up, down, left, right, front, back...), they are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0023] In addition, in the present invention, the descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features.

[0024] Please refer to Figures 1 to 6 , the pressure-sensitive electronic pen with overvoltage protection according to the embodiment of the present invention includes a pen body, a pressure sensor, a nib core rod, a pressure-bearing block, a pressure rod, and an elastic member.

[0025] The pressure-bearing block is fixedly arranged inside the pen body. The pressing rod is correspondingly arranged in front of the pressure sensor. Both ends of the elastic member are respectively connected to the pressing rod and the nib core rod. A limiting portion is arranged at the end of the nib core rod, and there is a preset distance between the limiting portion and the pressure-bearing block. The preset distance is very small, so that a very small gap is reserved between the limiting portion and the pressure-bearing block. Preferably, there is also a certain gap between the pressing rod and the pressure-bearing block.

[0026] During writing, the writing pressure received by the nib core rod is transmitted to the elastic member, and the elastic member then transmits it to the pressure sensor through the pressing rod. During normal writing, the elastic member will not be compressed and deformed. When the writing pressure is too large, the elastic member is compressed, the limiting portion of the nib core rod contacts the front end of the pressure-bearing block, and the nib core rod is blocked and limited by the pressure-bearing block to prevent the pressing rod from damaging the pressure sensor; when the nib core rod is released, the elastic member returns to its original state and continues to transmit the writing pressure.

[0027] As an implementation manner, a guiding hole is arranged in the pressure-bearing block, and a guiding column corresponding to be located in the guiding hole is arranged at the end of the nib core rod. The guiding hole matches the guiding column (the guiding column is inserted into the guiding hole from the front end), and limits the axial movement of the nib core rod, which can prevent the nib core rod from shaking during writing.

[0028] As an implementation manner, a limiting column corresponding to be located in the guiding hole is arranged at the front end of the pressing rod (the limiting column is inserted into the guiding hole from the rear end). The limiting column matches the guiding column, and limits the axial movement of the pressing rod, which can prevent the pressing rod from shaking during writing, improve the accuracy of the pressing rod transmitting pressure, and improve the pressure sensing accuracy.

[0029] As an implementation manner, the pressure-sensitive electronic pen with overpressure protection further includes a preloading spring. The preloading spring acts on the nib core rod and applies a backward preloading force to the nib core rod. The preloading spring keeps the pressing rod in continuous contact with the pressure sensor, improves the sensitivity of pressure sensing, and at the same time pre-compresses the nib core rod to prevent the nib core rod from being loose before or during writing, and improves the writing feel.

[0030] As an implementation manner, the elastic member is a clip spring piece. The clip spring piece is convenient to assemble, makes the overall structure more compact, and can also better transmit the writing pressure.

[0031] As an implementation manner, the pressure-bearing block is arranged in the middle of the clip spring piece.

[0032] As an implementation manner, the pressure-sensitive electronic pen with overpressure protection further includes a main bracket arranged inside the pen body. The pressure-bearing block can be fixedly arranged on the main bracket by glue.

[0033] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalent scope.

Claims

1. A pressure-sensitive electronic pen with overvoltage protection, comprising a pen body, a pressure sensor, and a pen tip core rod, characterized in that, It further includes a pressure-bearing block, a pressure rod, and an elastic member. The pressure-bearing block is fixedly arranged inside the pen body. The pressure rod is correspondingly arranged in front of the pressure sensor. Two ends of the elastic member are respectively connected to the pressure rod and the nib core rod. A limiting portion is arranged at the end of the nib core rod, and the limiting portion is spaced from the pressure-bearing block by a preset distance; During writing, the writing pressure received by the nib core rod is transmitted to the elastic member, and the elastic member then transmits it to the pressure sensor through the pressure rod; during normal writing, the elastic member will not be compressed and deformed; When the writing pressure is too large, the elastic member is compressed, the limiting portion of the nib core rod contacts the front end of the pressure-bearing block, and the nib core rod is blocked and limited by the pressure-bearing block to prevent the pressure rod from damaging the pressure sensor; when the nib core rod is released, the elastic member returns to its original state and continues to transmit the writing pressure; A guiding hole is arranged inside the pressure-bearing block, and a guiding post corresponding to and located inside the guiding hole is arranged at the end of the nib core rod; A limiting post corresponding to and located inside the guiding hole is arranged at the front end of the pressure rod.

2. The pressure-sensitive electronic pen with overvoltage protection according to claim 1, wherein It further includes a preloading spring, and the preloading spring acts on the nib core rod to apply a backward preloading force to the nib core rod.

3. The pressure-sensitive electronic pen with overvoltage protection according to claim 1, characterized in that The elastic member is a return spring piece.

4. The pressure-sensitive electronic pen with overvoltage protection according to claim 1, characterized in that, The pressure-bearing block is arranged in the middle of the return spring piece.

5. The pressure-sensitive electronic pen with overvoltage protection according to claim 1, characterized in that, It further includes a main bracket arranged inside the pen body, and the pressure-bearing block is fixedly arranged on the main bracket.

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