CN114201063A - Elastic sheet, pressure sensing assembly and touch pen - Google Patents

Abstract

The invention provides a spring plate, a pressure sensing assembly and a touch pen. The shell fragment establishes the body, supports body and connector including pasting, pastes and establishes the body and have the first hole of dodging, supports and holds the body interval and set up in pasting one side of establishing the body, and the body is established with pasting respectively at the both ends of connector and supports and hold the body coupling, and the connector is established the body for pasting and is followed the first axial protrusion of dodging the hole. The pressure sensing assembly comprises the elastic sheet; the touch pen comprises the pressure sensing component. The deformation area and the deformation length of the elastic sheet are large, and the elastic sheet is favorable for preventing plastic deformation caused by stress concentration.

Description

Elastic sheet, pressure sensing assembly and touch pen

Technical Field

The invention relates to the technical field of touch pens, in particular to an elastic sheet, a pressure-sensitive assembly and a touch pen.

Background

And a pressure sensing component is arranged on part of the touch pen so as to detect the pressure at the pen point of the touch pen, thereby adjusting the thickness degree of the handwriting of the touch pen. The stylus usually includes nib, main shaft, shell fragment and sensor, and the nib is connected in the tip of main shaft, and the main shaft with wear to establish the shell fragment, the main shaft can drive the shell fragment and move together, strain sensor then pastes and establishes on the shell fragment, strain sensor detects the deformation volume of shell fragment.

However, in the using process of the stylus, the elastic sheet may have a stress concentration phenomenon, and the stress concentration may cause local plastic deformation of the elastic sheet; compared with elastic deformation, plastic deformation can cause the elastic sheet to be incapable of resetting normally, so that the pressure-sensitive component or the touch pen can not be used normally.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the spring plate which can prevent local plastic deformation caused by stress concentration of the spring plate.

The invention also provides a pressure sensing assembly with the elastic sheet.

The invention also provides a touch control pen with the pressure sensing assembly.

The elastic sheet according to the embodiment of the first aspect of the invention comprises: the sticking body is provided with a first avoidance hole; the propping bodies are arranged on one side of the sticking body at intervals; the connector, both ends respectively with paste establish the body with support and hold the body coupling, the connector for paste establish the body and follow the axial protrusion in first dodging the hole.

The elastic sheet provided by the embodiment of the invention at least has the following beneficial effects: the sticking body of the elastic sheet can surround the periphery of the main shaft, and the deformation length and the deformation area of the sticking body are larger, so that the stress concentration of the elastic sheet is favorably reduced, and the elastic sheet is prevented from generating plastic deformation due to the stress concentration.

According to some embodiments of the present invention, the attaching body includes an installation portion and a first fixing portion, the first fixing portion has the first avoiding hole, the first fixing portion is connected to an outer edge of the installation portion, and the first fixing portion protrudes toward a direction close to the abutting body with respect to the installation portion.

According to some embodiments of the invention, the attaching body has a notch, the notch is communicated with the first avoiding hole, and the notch enables the supporting body to have two ends separated from each other along the circumferential direction of the first avoiding hole.

According to some embodiments of the invention, the support body further has a second avoidance hole, an axis of the first avoidance hole and an axis of the second avoidance hole are collinear, and a diameter of the second avoidance hole is smaller than the first avoidance hole.

According to a second aspect of the present invention, a pressure sensitive component comprises: the shrapnel of the embodiment of the first aspect; the sticking body is connected with the bracket; the main shaft penetrates through the inside of the bracket, the main shaft penetrates through the first avoidance hole, the main shaft and the abutting body abut against one side surface of the abutting body facing the attaching body, and the hole wall of the first avoidance hole and the main shaft are arranged at intervals; the sensor comprises a strain gauge, and the strain gauge is attached to the attaching body.

The pressure-sensitive component provided by the embodiment of the invention has the following beneficial effects: this pressure sense subassembly can realize writing the detection of pressure, and the deformation length and the deformation area of its shell fragment are great, thereby difficult emergence stress concentration takes place plastic deformation, and the pressure sense of pressure sense subassembly detects stability higher, and life is longer.

According to some embodiments of the invention, the elastic piece is provided with a plurality of elastic pieces, the elastic pieces are arranged along the axial direction of the main shaft at intervals, and the abutting body is arranged between the elastic pieces and the abutting body; the auxiliary part is provided with a third avoiding hole, the main shaft penetrates through the third avoiding hole, the main shaft is abutted against one side, facing the elastic sheet, of the auxiliary part, and the outer edge of the auxiliary part is connected with the support.

According to some embodiments of the invention, the auxiliary element comprises a plurality of connecting arms, the connecting arms are arranged at intervals along the circumference of the main shaft, and one end of each connecting arm, which is far away from the main shaft, is connected with the bracket.

According to some embodiments of the invention, the included angle between two adjacent connecting arms is a distribution angle, and any two distribution angles are the same.

According to some embodiments of the invention, the outer edge of the auxiliary member has a second fixing portion protruding in the axial direction of the main shaft.

The touch pen according to the third aspect of the invention comprises the pressure-sensitive component of the second aspect.

The pressure-sensitive component provided by the embodiment of the invention has the following beneficial effects: according to the touch pen, the elastic sheet is not easy to generate plastic deformation due to stress concentration, the writing effect stability of the touch pen is good, and the service life of the touch pen is long.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

fig. 1 is a schematic view of a spring plate according to an embodiment of the invention;

FIG. 2 is a schematic view of the spring plate of FIG. 1 at another angle;

FIG. 3 is a front view of the mounting portion of the spring plate of FIG. 1;

FIG. 4 is a schematic diagram of the strain gauge sensor attached to the spring plate in FIG. 1;

FIG. 5 is a schematic view of a pressure sensing assembly according to an embodiment of the present invention;

FIG. 6 is an exploded view of the pressure sensing assembly of FIG. 5;

FIG. 7 is a schematic view of the fit among the spindle, the spring plate and the auxiliary member;

FIG. 8 is a schematic view of the internal structure of the pressure sensing assembly of FIG. 5;

fig. 9 is a rear view of an auxiliary element according to an embodiment.

Reference numerals: 100-elastic sheet, 101-attaching body, 102-connecting body, 103-abutting body, 104-mounting part, 105-first fixing part, 106-first avoiding hole, 107-second avoiding hole, 301-notch, 401-strain sensor, 501-pressure sensing component, 502-bracket, 505-second fixing part, 506-main shaft, 601-auxiliary part and 901-connecting arm.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 and fig. 2, the invention provides a spring plate 100, wherein the spring plate 100 includes an attaching body 101, a supporting body 103 and a connecting body 102. The pasting body 101 is provided with a first avoiding hole 106, the propping bodies 103 are arranged at one side of the pasting body 101 at intervals, two ends of the connecting body 102 are respectively connected with the propping bodies 103 and the pasting body 101, and the connecting body 102 protrudes along the axial direction of the first avoiding hole 106 relative to the pasting body 101.

Referring to fig. 4 and 7, the strain gauge sensor 401 is attached to the attaching body 101, the first avoiding hole 106 allows the main shaft 506 of the stylus to pass through, and an axial end surface or a shoulder of the main shaft 506 can abut against the abutting body 103. The outer edge of the pasting body 101 can be fixedly connected with the bracket 502, the main shaft 506 can move relative to the bracket 502, and one end of the main shaft 506 is connected with the pen point; when the pen point is pressed by the screen, the main shaft 506 moves to push the supporting body 103 to move in a direction away from the pasting body 101, and since the outer edge of the pasting body 101 is fixed relative to the support 502, the pasting body 101 deforms, and the output signal of the strain sensor 401 changes along with the deformation of the pasting body 101.

According to the elastic sheet 100, the attaching body 101 can surround the periphery of the main shaft 506, the deformation length and the deformation area of the attaching body 101 are large, deformation generated by displacement of the main shaft 506 can be uniformly distributed on the large elastic sheet 100, and therefore stress concentration of the elastic sheet 100 can be reduced, and plastic deformation of the elastic sheet 100 due to stress concentration is prevented.

Under the condition that the abutting body 103 is arranged, the main shaft 506 does not need to abut against the abutting body 101, and the side face of the abutting body 101 for abutting against the strain sensor 401 does not need to reserve an area for abutting against the main shaft 506, so that the area of the abutting body 101 for abutting against the strain sensor 401 is increased, and the installation convenience and the installation firmness of the strain sensor 401 are improved.

Referring to fig. 1 and 2, in some embodiments, the mounting body 101 includes a mounting portion 104 and a first fixing portion 105. The first avoiding hole 106 is formed in the mounting portion 104, and a surface of the mounting portion 104 opposite to the supporting body 103 is used for attaching the strain gauge sensor 401. Attaching the strain gauge sensor 401 to the side of the attachment body 101 opposite to the abutting body 103 can reduce the convenience of mounting the strain gauge sensor 401, because if the strain gauge sensor 401 is attached to the side of the attachment body 101 facing the abutting body 103, the connecting body 102 and the abutting body 103 will hinder the mounting of the strain gauge sensor 401 to a certain extent. The first fixing portion 105 is connected to an outer edge of the mounting portion 104, and the first fixing portion 105 protrudes in an axial direction of the first avoiding hole 106 relative to the mounting portion 104. The first fixing portion 105 may be formed to protrude in the axial direction of the first avoiding hole 106, and the first fixing portion 105 may be formed to protrude in a direction toward the abutting body 103, or the first fixing portion 105 may be formed to protrude in a direction away from the abutting body 103. Referring to fig. 5, the first fixing portion 105 is used for being fixedly connected (e.g., welded) to the bracket 502, and the area of the connecting surface between the elastic sheet 100 and the bracket 502 can be increased by disposing the first fixing portion 105, so as to improve the connection convenience and connection firmness between the elastic sheet 100 and the bracket 502.

If the main shaft 506 abuts against the second avoiding hole 107 through the shaft shoulder thereof, the abutting body 103 further has the second avoiding hole 107, and the axis of the second avoiding hole 107 is collinear with the axis of the first avoiding hole 106. The second avoiding hole 107 is also provided for the spindle 506 to pass through, and with reference to fig. 1, 7 and 8, in some embodiments, a shoulder of the spindle 506 abuts against one side of the abutting body 103 facing the attaching body 101, accordingly, the attaching body 101 is closer to a pen point relative to the abutting body 103, and the first avoiding hole 106 needs to be larger than the second avoiding hole 107 to ensure that the spindle 506 can pass through the second avoiding hole 107 smoothly (a gap is provided between a hole wall of the first avoiding hole 106 and an outer periphery of the spindle 506).

Referring to fig. 1 and 3, in some embodiments, the attaching body 101 has a notch 301 (the notch 301 may be specifically disposed on the mounting portion 104), the notch 301 is communicated with the first avoidance hole 106, and the notch 301 is disposed such that the attaching body 101 has two ends spaced apart from each other along the circumferential direction of the first avoidance hole 106. The arrangement is convenient for processing and production of the elastic sheet 100; moreover, under the same external force acting on the abutting body 103, compared with the arrangement of the attaching body 101 in a ring shape (i.e. without the notch 301), the arrangement of the notch 301 is beneficial to increase the deformation amount of the attaching body 101, thereby improving the sensitivity of the pressure-sensitive component 501.

Referring to fig. 5 to 8, the present invention further provides a pressure-sensitive assembly 501, in which the pressure-sensitive assembly 501 includes a bracket 502, a spindle 506, a strain gauge sensor 401, and the spring plate 100 in the above embodiments. The stylus pen is generally provided with a pen holder and a pen point, one end of the main shaft 506 is used for connecting the pen point, and an electrical connection component such as a pogo pin (pogo pin) can be arranged inside the main shaft 506. The bracket 502 is sleeved outside the main shaft 506, the pen holder is fixedly connected with the bracket 502, and the pen holder is sleeved outside the bracket 502. The spindle 506 penetrates through the first avoiding hole 106 of the spring plate 100 and abuts against the abutting body 103 of the spring plate 100, and the strain sensor 401 is attached to the attaching body 101. When the pen point is pressed by the screen, the main shaft 506 moves to push the supporting body 103 to move in a direction away from the pasting body 101, and since the pasting body 101 and the support 502 are relatively fixed, the pasting body 101 deforms, and the output signal of the strain sensor 401 changes according to the deformation of the pasting body 101. This pressure is felt subassembly 501 can realize writing the detection of pressure, and the deformation length and the deformation area of its shell fragment 100 are great, thereby difficult emergence stress concentration takes place plastic deformation, and pressure is felt subassembly 501's stability is higher, and life is longer.

Referring to fig. 6-8, in some embodiments, the pressure sensing assembly 501 further comprises an auxiliary 601. The auxiliary 601 is elastic, the main shaft 506 penetrates through the auxiliary 601, the auxiliary 601 and the spring plate 100 are arranged at intervals along the axial direction of the main shaft 506, and the abutting body 103 is located between the auxiliary 601 and the attaching body 101; one side of the auxiliary 601 facing the spring 100 abuts against the main shaft 506, and the outer edge of the auxiliary 601 is connected with the bracket 502. In fig. 8, the auxiliary member 601 abuts against a shoulder of the main shaft 506; however, the shoulder abutting against the auxiliary 601 and the shoulder abutting against the abutting body 103 belong to two different shoulders of the main shaft 506.

The auxiliary piece 601 can be arranged under the condition that the main shaft 506 is long, the auxiliary piece 601 and the elastic sheet 100 can jointly adjust the coaxiality between the main shaft 506 and the support 502, the risk of the deflection of the main shaft 506 is reduced, and therefore the detection accuracy of the pressure sensing assembly 501 is guaranteed. In addition, when the main shaft 506 moves, the central area of the auxiliary 601 is also pushed to move, so that the auxiliary 601 is deformed. For example, in fig. 8, the spindle 506 moves backward when receiving pressure from the pen tip. The elastic force generated by the auxiliary element 601 needing to be reset has a certain limiting effect on the movement of the main shaft 506, and the phenomenon that the deformation of the elastic sheet 100 exceeds the elastic limit of the elastic sheet 100 due to overlong axial movement amplitude of the main shaft 506 during writing is prevented.

For a stylus with the pressure sensing component 501, based on the shape of the elastic sheet 100 and the fixing manner of the elastic sheet 100, the elastic sheet 100 is not uniformly stressed in all directions, and the writing effect thereof is usually different in all directions. "anisotropy" specifically refers to: after the axis of the stylus itself is rotated by a certain angle with a certain state as a reference, the writing effects of the stylus will be different in the two previous and subsequent times. Referring to fig. 9, in order to reduce the anisotropy of the stylus, in some embodiments, the auxiliary element 601 includes a plurality of connecting arms 901, one ends of the connecting arms 901 close to the main shaft 506 are connected to each other, the connecting arms 901 are spaced apart along the circumference of the main shaft 506, and one ends of the connecting arms 901 far from the main shaft 506 are connected to the bracket 502. The arrangement can increase the number of connection points between the circumferential auxiliary part 601 and the bracket 502 along the main shaft 506, improve the stress uniformity of the auxiliary part 601 in each direction, and reduce the difference of each direction of the stylus. In order to further reduce the anisotropic difference of the stylus, the plurality of connecting arms 901 may be uniformly distributed along the circumferential direction of the main shaft 506; specifically, along the circumferential direction of the main shaft 506, an included angle between two adjacent connecting arms 901 is a distribution angle, the number of the distribution angles is the same as that of the connecting arms 901, and any two distribution angles are the same. Taking fig. 9 as an example, for the auxiliary element 601 provided with three connecting arms 901, the angle value of the included angle between any two adjacent connecting arms 901 is β.

Referring to fig. 5 and 7, in some embodiments, the outer edge of the auxiliary 601 has a second fixing portion 505, and the second fixing portion 505 protrudes in the axial direction of the main shaft 506. Similar to the first fixing portion 105, a side of the second fixing portion 505 facing the main shaft 506 is used for fixing connection (e.g., welding) with the bracket 502. The second fixing portion 505 is disposed to increase a connection area between the second fixing portion 505 and the support 502, so as to improve connection convenience and connection firmness between the auxiliary 601 and the support.

The invention also provides a touch pen, which comprises the pressure-sensitive component 501 in the embodiment. The stylus further includes a pen point, a pen holder, and a main board, the pen point is connected to one end of the main shaft 506, and the pen point is exposed outside the pen holder and located at an end of the pen holder. The pressure sensing component 501 may be housed inside the barrel. The main board is accommodated in the pen holder, is electrically connected with the strain gauge sensor 401 (for example, electrically connected through an FPC), and is used for receiving and processing an output signal of the strain gauge sensor 401. The elastic sheet 100 of the touch pen is not easy to generate plastic deformation due to stress concentration, and the touch pen has good writing effect stability and long service life.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims (10)

1. The shell fragment, its characterized in that includes:

the sticking body is provided with a first avoidance hole;

the propping bodies are arranged on one side of the sticking body at intervals;

the connector, both ends respectively with paste establish the body with support and hold the body coupling, just the connector for paste establish the body and follow the axial protrusion in first dodging the hole.

2. The elastic sheet according to claim 1, wherein the attaching body comprises an installation part and a first fixing part, the first fixing part is provided with the first avoiding hole, the first fixing part is connected to the outer edge of the installation part, and the first fixing part protrudes in the axial direction of the first avoiding hole relative to the installation part edge.

3. The elastic piece according to claim 1, wherein the attaching body has a notch, the notch is communicated with the first avoiding hole, and the notch enables the supporting body to have two ends separated from each other along the circumferential direction of the first avoiding hole.

4. An elastic sheet according to claim 1, wherein said abutting body further has a second avoidance hole, and an axis of said first avoidance hole and an axis of said second avoidance hole are collinear.

5. Pressure-sensitive component, its characterized in that includes:

the shrapnel of any one of claims 1 to 4;

the sticking body is connected with the bracket;

the main shaft penetrates through the inside of the support, the main shaft penetrates through the first avoidance hole, and the main shaft and the abutting body abut against one side surface of the abutting body facing the attaching body;

and the strain sensor is attached to the attaching body.

6. The pressure-sensitive assembly according to claim 5, further comprising an auxiliary member, wherein the auxiliary member has elasticity, the auxiliary member and the resilient piece are arranged at an interval in the axial direction of the spindle, and the abutting body is located between the auxiliary member and the abutting body;

the main shaft penetrates through the auxiliary piece, the main shaft is abutted to one side, facing the elastic piece, of the auxiliary piece, and the outer edge of the auxiliary piece is connected with the support.

7. The pressure sensing assembly of claim 6, wherein the auxiliary member comprises a plurality of connecting arms spaced apart along a circumference of the main shaft, and an end of the connecting arm remote from the main shaft is connected to the bracket.

8. The pressure-sensitive component of claim 7, wherein an included angle between two adjacent connecting arms is a distribution angle in a circumferential direction of the main shaft, and any two distribution angles are the same.

9. The pressure sensing assembly of claim 6, wherein the outer edge of the auxiliary member has a second fixing portion protruding in the axial direction of the main shaft.

10. Stylus comprising a pressure sensitive component according to any of claims 5 to 9.

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