CN220290191U - Touch pen and electronic equipment - Google Patents

Abstract

The utility model discloses a touch pen and an electronic device, wherein the touch pen comprises: the shell is of a pen-shaped structure, and an opening is formed in the front end of the shell; the pen point mechanism is arranged on the central axis in the shell, the front end of the pen point mechanism extends out of the opening, and the pen point mechanism can move back and forth along the central axis of the shell; the piezoresistor sensor comprises a flexible circuit board, a piezoresistor film, a positive electrode and a negative electrode; the mainboard is installed in the casing, and piezoresistor sensor and mainboard electric connection. High processing efficiency and low cost. In addition, the piezoresistor film adopts a convex structure, so that the detection precision of the nib pressure is improved. The positive electrode and the negative electrode are arranged at the bottom of the piezoresistor film with the convex structure, one side of the convex structure can not be extruded, the piezoresistor film can not deform under the state of no external force, and the detection range and the service life of the stress of the touch pen can be improved.

Description

Touch pen and electronic equipment

Technical Field

The present utility model relates to the field of touch control, and in particular, to a stylus and an electronic device.

Background

The initial state of the touch pen is a prepressing state, an initial resistance value is needed, meanwhile, the existence of force can be detected as soon as pressure is generated, the detection of slight force is needed to be very sensitive, the touch pen with the built-in piezoresistor sensor is currently arranged on the market, the pen point of the touch pen is directly abutted to the piezoresistor sensor through the connecting post, when the pen point is stressed, the connecting post extrudes the piezoresistor sensor, the piezoresistor sensor is stressed to generate resistance value change, the detection requirement of the slight writing force of the touch pen is met, and the thickness distinction of writing lines is realized through the difference of the pressure.

The existing stylus has the following defects: the built-in piezoresistor sensor adopts a three-layer structure of an upper electrode, a pressure sensitive layer and a lower electrode, three-layer paster processing is needed, the cost is high, the processing efficiency is low, the detection sensitivity of the piezoresistor sensor is low, the detection range is small, and the service life is short.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a touch pen and electronic equipment, which can solve the problems of high cost, low processing efficiency, low detection sensitivity, small detection range and short service life of the conventional touch pen.

According to an embodiment of the first aspect of the utility model, the stylus comprises a shell, wherein the shell is of a pen-shaped structure, and an opening is formed in the front end of the shell; the pen point mechanism is arranged on the central axis in the shell, the front end of the pen point mechanism extends out of the opening, and the pen point mechanism can move back and forth along the central axis of the shell; the piezoresistor sensor comprises a flexible circuit board, a piezoresistor film, a positive electrode and a negative electrode, wherein the positive electrode and the negative electrode are arranged on the flexible circuit board, the piezoresistor film is covered on the flexible circuit board and is respectively attached to the positive electrode and the negative electrode at the bottom, the middle area of the piezoresistor film is outwards protruded, and the tail end of the pen point mechanism is abutted to the protruded area of the piezoresistor film; and the main board is arranged in the shell, and the positive electrode and the negative electrode of the piezoresistor sensor are respectively and electrically connected with the main board.

The touch control pen provided by the embodiment of the first aspect of the utility model has at least the following beneficial effects:

according to the utility model, when the nib mechanism is stressed, the piezoresistor film is extruded in a backward movement mode, the stress of the piezoresistor sensor is changed through the movement of the nib mechanism, the resistance is changed along with the stress, and the main board judges the stress of the nib mechanism according to the sensed resistance change, so that the writing change is realized. The piezoresistor sensor that adopts in this application all sets up positive electrode and negative electrode in piezoresistor film bottom, adopts bilayer structure promptly on flexible circuit board, can reduce the time of one deck paster, and machining efficiency is high and with low costs. In addition, the piezoresistor film adopts a convex structure, the convex structure is easier to rebound relative to a plane structure, the original position is restored, the zeroing effect of the touch pen is better, and the detection precision of the nib pressure is improved. In addition, the positive electrode and the negative electrode are arranged at the bottom of the piezoresistor film with the convex structure, one side of the convex structure is not extruded, the piezoresistor film is not deformed under the condition without external force, and the detection range and the service life of the stress of the touch pen can be improved.

According to some embodiments of the utility model, the pen point mechanism comprises a pen point and a conductive rod, the conductive rod is arranged on the central axis of the shell, the pen point is arranged at the opening, the front end of the conductive rod extends out of the opening and is fixedly connected with the pen point so as to drive the conductive rod to move back and forth through the pressing of the pen point, and the tail end of the conductive rod is abutted with the front end of the piezoresistor sensor.

According to some embodiments of the utility model, a deformable support is further disposed in the housing, the support is mounted in the housing, the end of the pen point mechanism is fixedly connected with the support for deforming the support through back and forth movement, and the piezoresistor sensor is attached to a support post of the support.

According to some embodiments of the utility model, the pen point mechanism comprises a pen point and a conductive rod, the conductive rod is arranged on the central axis of the shell, the pen point is arranged at the opening, the front end of the conductive rod extends out of the opening and is fixedly connected with the pen point so as to drive the conductive rod to move back and forth through the pressing of the pen point, and the tail end of the conductive rod is fixedly connected with the support.

According to some embodiments of the utility model, the conductive rod is wrapped with a tubular shielding piece, the tubular shielding piece moves synchronously with the conductive rod, and the tubular shielding piece is fixedly connected with the bracket.

According to some embodiments of the utility model, a screw hole is formed in the middle of the bracket, and the bracket is fixedly connected with the tubular shielding piece through a bolt.

According to some embodiments of the utility model, the bracket is a U-shaped bracket.

According to some embodiments of the utility model, the positive electrode and the negative electrode are both metal coils with a net structure, and the metal coils of the positive electrode and the negative electrode are staggered at the bottom of the varistor film.

According to some embodiments of the utility model, the pen cap is used for being sleeved at the front end of the shell to protect the pen point mechanism.

An electronic device according to an embodiment of the second aspect of the present utility model includes a tablet device and the stylus described above.

According to the utility model, when the pen point mechanism is stressed, the force applied to the piezoresistor sensor is changed through the movement of the pen point mechanism, the resistance change is generated, and the main board judges the force applied to the pen point mechanism according to the sensed resistance change, so that the writing change is realized. The piezoresistor sensor that adopts in this application all sets up positive electrode and negative electrode in piezoresistor film bottom, adopts bilayer structure promptly on flexible circuit board, can reduce the time of one deck paster, and machining efficiency is high and with low costs. In addition, the piezoresistor film adopts a convex structure, the convex structure is easier to rebound relative to a plane structure, the original position is restored, the zeroing effect of the touch pen is better, and the detection precision of the nib pressure is improved. In addition, the positive electrode and the negative electrode are arranged at the bottom of the piezoresistor film with the convex structure, one side of the convex structure is not extruded, the piezoresistor film is not deformed under the condition without external force, and the detection range and the service life of the stress of the touch pen can be improved.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic diagram illustrating an internal structure of a first stylus according to an embodiment of the present utility model;

FIG. 2 is a schematic front view of a piezoresistive sensor according to an embodiment of the present utility model;

FIG. 3 is a schematic side view of a piezoresistive sensor according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of the installation of the positive and negative electrodes and flexible circuit board in a piezoresistive sensor;

FIG. 5 is a schematic diagram illustrating an internal structure of a second stylus according to an embodiment of the utility model;

fig. 6 is a schematic diagram illustrating an external structure of a first stylus according to an embodiment of the utility model.

Reference numerals:

the pen comprises a housing 100, an opening 110, a pen point mechanism 200, a pen point 210, a conductive rod 220, a tubular shielding member 230, a shielding ring 240, a bracket 300, a bolt 310, a piezoresistor sensor 400, a flexible circuit board 410, a piezoresistor film 420, a positive electrode 430, a negative electrode 440 and a fixed bracket 500.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus 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 utility model.

In the description of the present utility model, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed 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 utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1, a stylus includes a housing 100, a pen point mechanism 200, a piezoresistor sensor 400 and a main board, wherein the housing 100 has a pen-shaped structure, which is used for conveniently holding and protecting internal components, and an opening 110 is provided at the front end of the housing 100; the nib mechanism 200 is mounted on a central axis in the housing 100, the front end of the nib mechanism 200 protrudes out of the opening 110, and the nib mechanism 200 can move back and forth along the central axis of the housing 100. The tip of the nib mechanism 200 is connected with the piezoresistor sensor 400, when the nib mechanism 200 writes on the touch screen, the front end of the nib mechanism 200 is extruded to move backwards, when the force is reduced, the nib mechanism 200 stretches forwards and returns, the piezoresistor sensor 400 is deformed through the forward and backward movement, the main board is installed in the shell 100, and the piezoresistor sensor 400 is electrically connected with the main board. The resistance can change when the piezoresistor sensor 400 is stressed, and the mainboard converts an analog signal fed back by the piezoresistor sensor 400 into a digital signal and recognizes the digital signal, so that the interaction state of the touch pen and a host end is changed, the feedback of different writing forces can be realized, and further different writing effects are realized, for example, the size distinction of writing lines is realized according to the different writing forces.

Specifically, referring to fig. 2 to 4, the piezoresistive sensor 400 in the present utility model includes a flexible circuit board 410, a piezoresistive film 420, a positive electrode 430 and a negative electrode 440, wherein the positive electrode 430 and the negative electrode 440 are disposed on the flexible circuit board 410, the piezoresistive film 420 covers the flexible circuit board 410 and is respectively attached to the positive electrode 430 and the negative electrode 440 at the bottom, and the middle area of the piezoresistive film 420 protrudes outwards.

The piezoresistor sensor that adopts in this application all sets up positive electrode and negative electrode in piezoresistor film bottom, adopts bilayer structure promptly on flexible circuit board, can reduce the time of one deck paster, and machining efficiency is high and with low costs. In addition, the piezoresistor film adopts a convex structure, the convex structure is easier to rebound relative to a plane structure, the original position is restored, the zeroing effect of the touch pen is better, and the detection precision of the nib pressure is improved. In addition, the positive electrode and the negative electrode are arranged at the bottom of the piezoresistor film with the convex structure, one side of the convex structure is not extruded, the piezoresistor film is not deformed under the condition without external force, and the detection range and the service life of the stress of the touch pen can be improved.

Specifically, the pen point mechanism 200 in the present application includes a pen point 210 and a conductive rod 220, the conductive rod 220 is mounted on a central axis of the housing 100, the pen point 210 is mounted at the opening 110, and a front end of the conductive rod 220 extends out of the opening 110 and is fixedly connected with the pen point 210 so as to drive the conductive rod 220 to move back and forth through pressing of the pen point 210. In this embodiment, the stylus specifically includes two structures, referring to fig. 1, which is an internal structure diagram of a first stylus, where the end of the conductive rod 220 in the first stylus is abutted to the front end of the piezoresistive sensor 400 through the fixing bracket 500, the front end of the fixing bracket 500 is configured as a clamping groove structure to clamp the end of the conductive rod 220, and the rear end of the fixing bracket 500 is configured as a planar structure and abutted to one surface of the protrusion of the piezoresistive film 420 in the piezoresistive sensor 400, so that force transmission is achieved by directly extruding the protrusion of the piezoresistive film 420 in the piezoresistive sensor 400 through the end of the conductive rod 220. When the stylus is a capacitive stylus, the pen point 210 and the conductive rod 220 are used as TX electrodes, a shielding ring 240 is arranged on the periphery of the conductive rod 220, the RX electrodes are arranged outside the shielding ring 240, and the TX electrodes are not interfered by external signals and RX signals through the shielding ring 240.

In the touch pen of the first embodiment, the nib 210 directly presses the piezo-resistive sensor 400 through the conductive rod 220, so that the structure is simple, the production and assembly are convenient, but the piezo-resistive sensor 400 is easy to damage due to the direct pressing of the conductive rod 220, the service life is short, and the range of the variation of the resistance of the piezo-resistive sensor 400 pressed is small, so that the detection range of the slight writing force of the touch pen is not large, and the range of the thickness of lines can be small.

To solve this problem, referring to fig. 5, a second stylus structure according to the present utility model includes a deformable support 300 disposed in a housing 100. In this embodiment, the stand 300 is made of a metal frame, and is deformable and not easy to break, the stand 300 is installed in the housing 100, the end of the pen point mechanism 200 is fixedly connected with a pillar on one side of the stand 300, when the pen point mechanism 200 writes on the touch screen, the front end of the pen point mechanism 200 is extruded to move backward, when the force is reduced, the pen point mechanism 200 extends forward and returns, and the stand 300 is deformed by the forward and backward movement; the piezoresistor sensor 400 is attached to a support column at the other side of the support 300, the resistance of the piezoresistor sensor 400 is changed through deformation of the support 300, the main board is installed in the shell 100, and the piezoresistor sensor 400 is electrically connected with the main board. The resistance can change when the piezoresistor sensor 400 is stressed, and the mainboard converts an analog signal fed back by the piezoresistor sensor 400 into a digital signal and recognizes the digital signal, so that the interaction state of the touch pen and a host end is changed, the feedback of different writing forces can be realized, and further different writing effects are realized, for example, the size distinction of writing lines is realized according to the different writing forces.

The stylus structure of fig. 5 is provided with a deformable support 300 between the nib mechanism 200 and the piezo-resistive sensor 400, when the nib mechanism 200 is stressed, the deformable support 300 is driven to deform, the piezo-resistive sensor 400 attached to the support column of the support 300 changes resistance, and the main board determines the stress of the nib mechanism 200 according to the sensed resistance change. This application increases a deformable support 300 between nib mechanism 200 and piezoresistor sensor 400, and piezoresistor sensor 400 responds to the atress size of nib through deformation, avoids the direct butt piezoresistor sensor 400 of nib mechanism 200, can improve life to piezoresistor sensor 400 is greater through the resistance change scope that deformation produced, and the detection scope of the slight writing force of stylus is greater, and the line thickness scope that can realize when writing through the stylus is greater.

Specifically, the pen point mechanism 200 includes a pen point 210 and a conductive rod 220, and a front bracket is provided at the front end of the housing 100 for supporting the pen point mechanism 200. The front bracket is internally provided with a cavity for wrapping the conductive rod 220, the conductive rod 220 can move back and forth along the cavity, the conductive rod 220 is arranged on the central axis of the shell 100, the pen point 210 is arranged at the opening 110, the front end of the conductive rod 220 extends out of the opening 110 and is fixedly connected with the pen point 210, the pen point 210 and the conductive rod 220 can also be integrally formed, the tail end of the conductive rod 220 is fixedly connected with the bracket 300, the conductive rod 220 is driven to move backwards when the pen point 210 is pressed and stressed, the bracket 300 is driven to deform, and when the stress of the pen point 210 is reduced, the conductive rod 220 and the pen point 210 are pushed to move forwards by the resilience force of the bracket 300.

Specifically, in this application, the stylus is a capacitive pen, so the housing 100 is further provided with TX electrodes and RX electrodes, the TX electrodes and the RX electrodes are respectively connected to the motherboard, the nib 210 is used as the TX electrodes, the conductive rod 220 and the nib 210 are made of conductive materials, and the TX electrodes and the RX electrodes are respectively connected to the motherboard, so as to realize the basic function of the capacitive pen.

In order to realize signal shielding, the outer side of the conductive rod 220 is wrapped with a tubular shielding member 230, the rx electrode is arranged outside the tubular shielding member 230, isolation of the transmitted signal and the received signal is realized, the tubular shielding member 230 and the conductive rod 220 move synchronously, and the tubular shielding member 230 is fixedly connected with the bracket 300.

Specifically, the bracket 300 in the present application is a U-shaped bracket, a screw hole is provided in the middle of the bracket 300, and the bracket 300 is fixedly connected with the tubular shielding member 230 through a bolt 310. The two sides of the U-shaped bracket are respectively provided with a pillar, the piezoresistor sensor 400 is attached to the pillar far away from the pen point 210, when the pillar is deformed, the piezoresistor sensor 400 attached to the pillar changes in resistance, and the resistance is transmitted to the main board through the flexible circuit board 410.

In this embodiment, the flexible circuit board 410 is also called FPC board, and is a flexible circuit board, the varistor film 420 is made of a pressure-sensitive material, and the resistance of the material changes when the material is subjected to an external force. Such a material is generally composed of conductive particles arranged alternately with each other, and when pressure is applied from the outside, the conductive particles are in contact with each other, are pressed and moved, and the like, thereby affecting the resistance value inside the whole material. Referring to fig. 4, the positive electrode 430 and the negative electrode 440 in the present application are metal coils of a mesh structure, and the metal coils of the positive electrode 430 and the negative electrode 440 are alternately arranged at the bottom of the varistor film 420. It should be understood that the metal coils of the positive electrode 430 and the negative electrode 440 are not connected to each other, and the piezo-resistor is used as a power consumer in the sensor circuit, and in this embodiment, the positive and negative electrodes are in contact with the piezo-resistor film 420 in a mesh form, and the power consumer is divided into a plurality of power consumers, so that the sensitivity of pressure detection can be further improved.

It should be noted that, during the use of the piezoresistive sensor 400, the direction of the force is not completely vertical, and the position of the force is not completely centered, so that the piezoresistive film 420 is not easily displaced during the use of the meshed metal coil. However, the conventional varistor film 420 with double-sided electrodes is easily displaced due to the loading of external force without lateral limitation, resulting in uneven stress distribution, which affects the application effect. Of course, a single positive and negative electrode may be used in the present application to save costs.

Wherein, in order to protect the nib 210, the present application further includes a cap detachably sleeved on the front end of the housing 100. Conventional accessory devices such as a Bluetooth module, a battery module and the like can be additionally arranged in the shell 100, and data transmission and power supply can be realized by adopting a mode of connecting the tail ends with data wires.

Referring to fig. 6, an electronic device of the present utility model includes a tablet device and a stylus according to the above embodiments, where the tablet device may be various types of host devices with touch liquid crystal screens, such as a tablet computer, an interactive television, a notebook, a display stand, and so on.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (10)

1. A stylus, comprising:

the shell (100), the shell (100) is of a pen-shaped structure, and an opening (110) is formed in the front end of the shell (100);

the pen point mechanism (200) is arranged on a central axis in the shell (100), the front end of the pen point mechanism (200) extends out of the opening (110), and the pen point mechanism (200) can move back and forth along the central axis of the shell (100);

the piezoresistor sensor (400), the piezoresistor sensor (400) comprises a flexible circuit board (410), a piezoresistor film (420), a positive electrode (430) and a negative electrode (440), wherein the positive electrode (430) and the negative electrode (440) are arranged on the flexible circuit board (410), the piezoresistor film (420) covers the flexible circuit board (410) and is respectively attached to the positive electrode (430) and the negative electrode (440) at the bottom, the middle area of the piezoresistor film (420) protrudes outwards, and the tail end of the pen point mechanism (200) is abutted to the protruding area of the piezoresistor film (420);

and the main board is arranged in the shell (100), and a positive electrode (430) and a negative electrode (440) of the piezoresistor sensor (400) are respectively and electrically connected with the main board.

2. The stylus of claim 1, wherein the pen point mechanism (200) comprises a pen point (210) and a conductive rod (220), the conductive rod (220) is mounted on a central axis of the housing (100), the pen point (210) is mounted at the opening (110), a front end of the conductive rod (220) extends out of the opening (110) and is fixedly connected with the pen point (210) so as to drive the conductive rod (220) to move back and forth through pressing of the pen point (210), and a tail end of the conductive rod (220) is abutted with a front end of the piezoresistor sensor (400).

3. The stylus of claim 1, wherein a deformable support (300) is further disposed in the housing (100), the support (300) is mounted in the housing (100), the tip of the pen point mechanism (200) is fixedly connected to the support (300) for deforming the support (300) by moving back and forth, and the piezo-resistive sensor (400) is attached to a post of the support (300).

4. A stylus according to claim 3, wherein the pen point mechanism (200) comprises a pen point (210) and a conductive rod (220), the conductive rod (220) is mounted on a central axis of the housing (100), the pen point (210) is mounted at the opening (110), a front end of the conductive rod (220) extends out of the opening (110) and is fixedly connected with the pen point (210) so as to drive the conductive rod (220) to move back and forth through pressing of the pen point (210), and a tail end of the conductive rod (220) is fixedly connected with the bracket (300).

5. The stylus of claim 4, wherein the conductive rod (220) is surrounded by a tubular shield (230), the tubular shield (230) moves synchronously with the conductive rod (220), and the tubular shield (230) is fixedly connected with the bracket (300).

6. The stylus of claim 5, wherein a screw hole is provided in the middle of the bracket (300), and the bracket (300) is fixedly connected with the tubular shield (230) through a bolt.

7. A stylus according to claim 3, wherein the holder (300) is a U-shaped holder.

8. The stylus of claim 1, wherein the positive electrode (430) and the negative electrode (440) are both metal coils of a mesh structure, and the metal coils of the positive electrode (430) and the negative electrode (440) are alternately arranged at the bottom of the varistor film (420).

9. The stylus of claim 1, further comprising a cap for covering a front end of the housing (100) to protect the nib mechanism (200).

10. An electronic device comprising a tablet device and a stylus according to any one of claims 1 to 9.