Patent Description:
In some electronic products, such as commercial intelligent interactive boards, or electronic blackboards for teachers and students, for convenience, a stylus is provided on a side of an apparatus body, and the stylus may be used to write on a screen surface of a commercial intelligent interactive board or an electronic blackboard, thereby completing interactive functions such as writing between the user and the apparatus.

In order for the intelligent interactive board or electronic blackboard to perceive a state of the stylus being picked up and put back by the user from the side of the body of the intelligent interactive board or electronic blackboard and then entering a corresponding writing or other interactive state, a connection status between the stylus and the apparatus body needs to be detected stably and effectively. <CIT> discloses a retractable fang attachment structure for an improved attachment of a stylus to a computing device when not in use, the stylus of which may comprise magnets that cooperate with magnets in the computing device to magnetically secure the stylus to the device, and a retractable interlock that may automatically extend from the stylus when it is in proximity of the computing device, wherein the interlock is received in a receptacle of the computing device providing an improved attachment through the mechanical interaction of the interlock and the receptacle.

According to the present disclosure, a device according to independent claim for detecting a fixation of a stylus and an intelligent interactive board is provided, which can stably and effectively detect a state of the stylus.

According to an aspect of the present disclosure, a device for detecting a fixation of a stylus is provided, which includes a first support, a switch assembly, a magnet assembly and an elastic assembly. The switch assembly is arranged on the first support; a side of the magnet assembly being away from the first support is used to adsorb the stylus; the switch assembly includes a micro switch, the micro switch includes a triggering button, the triggering button is arranged facing the magnet assembly, and the magnet assembly includes a triggering part; the magnet assembly is movably connected with the first support, and the elastic assembly is arranged at a movable joint between the magnet assembly and the first support. When the device for detecting the fixation of the stylus detects the stylus, the magnet assembly is away from the first support under an action of an adsorption force of the stylus, and the triggering part does not contact with the triggering button; when the device for detecting the fixation of the stylus does not detect the stylus, the elastic assembly causes the magnet assembly and the first support to be in a bonding state, and the triggering part contacts with the triggering button.

Therefore, the device for detecting the fixation of the stylus according to the present disclosure can stably and effectively detect the state of the stylus.

According to another aspect of the present disclosure, an intelligent interactive board is further provided, which includes a frame, a stylus and the above-mentioned detection device, the device for detecting the fixation of the stylus is arranged inside the frame, the first support of the device for detecting the fixation of the stylus is fixedly connected with the frame, at least a part of the frame is formed with an installing part, and the stylus is placed on the installing part.

According to the present disclosure, a device for detecting a fixation of a stylus and an intelligent interactive board is provided. The device for detecting the fixation of the stylus according to the present disclosure includes a first support, a switch assembly, a magnet assembly and an elastic assembly, the switch assembly is arranged on the first support; the side of the magnet assembly being away from the first support is used to adsorb the stylus; the switch assembly includes a micro switch, the micro switch includes a triggering button, the triggering button is arranged facing the magnet assembly, and the magnet assembly includes a triggering part; the magnet assembly is movably connected with the first support, and the elastic assembly is arranged at a movable joint between the magnet assembly and the first support. When the device for detecting the fixation of the stylus detects the stylus, the magnet assembly is away from the first support under an action of an adsorption force of the stylus, and the triggering part does not contact with the triggering button; when the device for detecting the fixation of the stylus does not detect the stylus, the elastic assembly causes the magnet assembly and the first support to be in a bonding state, and the triggering part contacts with the triggering button. The device for detecting the fixation of the stylus according to the present disclosure can detect the state of the stylus stably and effectively.

Hereinafter, the technical solutions in the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, but not all examples.

Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present disclosure. In the case of no conflict, the following embodiments and features in the embodiments may be combined with each other.

In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the referred device or elements must have certain orientations, be constructed and operated in certain orientations, and thus, they should not be construed as limiting the present disclosure.

In the present disclosure, terms such as "installation", "connection with", "connection" and "fixation" should be interpreted in a broad sense, for example, it may be a fixed connection or a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediary, it may be the internal communication of two elements or the interaction relationship between two elements. Those skilled in the art may understand the specific meanings of the above terms in the present disclosure according to specific situations.

It should be noted that in the description of the present disclosure, the terms "first" and "second" are only used to describe different components conveniently, and should not be understood as indicating or implying a sequence relationship, relative importance, or implicitly indicating the number of technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features.

In some electronic products, such as commercial intelligent interactive boards, or electronic blackboards for teachers and students, for convenience, a stylus is provided on a side of the device body, and the stylus may be used on the screen surface of commercial display apparatuses or learning machines for being written, so as to complete interactive functions such as writing between the user and the apparatus, and in order to allow the intelligent interactive board or electronic blackboard to perceive a state of the stylus being picked up and put back by the user from the side of the body of the intelligent interactive board or electronic blackboard, and then entering a corresponding writing or other interactive state, a connection status between the stylus and the apparatus body needs to be detected stably and effectively.

<FIG> is a schematic diagram of a partial structure of a display apparatus. As shown in <FIG>, the existing commercial display apparatus includes a frame <NUM>, a support <NUM>, a Hall sensor <NUM>, a magnet <NUM> and a stylus <NUM>, where the support <NUM> is locked on the frame <NUM>, and the support <NUM> is made of a magnetic material. The magnet <NUM> is fixed on the support <NUM> by attractive force, the Hall sensor <NUM> is fixed on the support <NUM>, and the Hall sensor <NUM> is located on a side of the magnet <NUM> being away from the stylus <NUM>, and the stylus <NUM> is attracted in a stylus positioning slot <NUM> on the frame <NUM> of the whole machine by magnetic force, the Hall sensor <NUM> is used to detect an adsorption state between the stylus <NUM> and the stylus positioning slot <NUM>, so that the commercial display apparatus enters a corresponding writing or other interactive state.

However, when detecting an adsorption state between the stylus and the stylus positioning slot through the above structure, there are the following defects. Firstly, due to the use principle of the Hall sensor, when the Hall sensor is installed in real time, an accurate value of an external magnetic field that can be monitored needs to be determined, resulting in multiple debugging, which leads to the limitation of the development of the above structure and slows down a processing efficiency of electronic apparatuses. Secondly, the Hall sensor mainly detects a magnetic field, and when an external magnetic field also exists, the external magnetic field may easily interfere with the detection of the existing magnetic field by the Hall sensor, resulting in inaccurate signal feedback of the Hall sensor.

Therefore, the present disclosure provides a device for detecting a fixation of a stylus and an intelligent interactive board, which can overcome the above-mentioned defects.

The present disclosure will be described in detail below in conjunction with the accompanying drawings and optional embodiments.

<FIG> is a schematic structural diagram of a device for detecting a fixation of a stylus according to an embodiment of the present disclosure. <FIG> is another schematic structural diagram of a device for detecting a fixation of a stylus according to an embodiment of the present disclosure. <FIG> is a schematic cross-sectional view of the device for detecting the fixation of the stylus in <FIG>. <FIG> is a schematic cross-sectional view of the device for detecting the fixation of the stylus in <FIG>.

According to an embodiment of the present disclosure, a device for detecting a fixation of a stylus is provided, which may be arranged on an electronic apparatus, such as embedded in a housing of the electronic apparatus, so as to detect whether a stylus <NUM> is fixed at a preset position of the electronic apparatus. The electronic apparatus may be a commercial display panel or other apparatuses requiring a stylus.

As shown in <FIG>, the device for detecting the fixation of the stylus includes components such as a first support <NUM>, a switch assembly <NUM>, a magnet assembly <NUM>, and an elastic assembly <NUM>. A side of the magnet assembly <NUM> being away from the first support <NUM> is used to place and adsorb the stylus <NUM>; the switch assembly <NUM> includes a micro switch <NUM>, the micro switch <NUM> includes a triggering button, the triggering button is arranged facing the magnet assembly <NUM>, and the magnet assembly includes a triggering part <NUM>, so that the micro switch <NUM> may be used to send a detection signal when being triggered; the magnet assembly <NUM> is movably connected with the first support <NUM>, and the elastic assembly <NUM> is arranged at a movable joint between the magnet assembly <NUM> and the first support <NUM>. When the device for detecting the fixation of the stylus detects the stylus <NUM>, the magnet assembly <NUM> is away from the first support <NUM> under an action of an adsorption force of the stylus <NUM>, and the triggering part <NUM> does not contact with the triggering button (this case may correspond to a button releasing state), and thus, the device for detecting the fixation of the stylus detects that the stylus <NUM> is in an adsorption state; when the device for detecting the fixation of the stylus does not detect the stylus <NUM>, the elastic assembly <NUM> causes the magnet assembly <NUM> and the first support <NUM> to be in a bonding state, and the triggering part <NUM> contacts with the triggering button, and correspondingly, the device for detecting the fixation of the stylus detects that the stylus <NUM> is in a detaching state.

When the stylus <NUM> is in the adsorption state, the stylus <NUM> is fixed on the device for detecting the fixation of the stylus or on the electronic apparatus. When the stylus <NUM> is in the detaching state, the stylus <NUM> detaches from the electronic apparatus and may perform writing and other operations.

It should be noted that the micro switch <NUM> may include a transmission mechanism and an action reed. Specifically, when the magnet assembly <NUM> abuts against the micro switch <NUM>, the force generated by the magnet assembly <NUM> acts on the action reed through the transmission mechanism, so that a fixed contact and a movable contact at an end of the micro switch <NUM> are quickly connected. When the magnet assembly <NUM> leaves the micro switch <NUM>, the force on the transmission mechanism disappears, and then the force on the action reed disappears, which promotes the fixed contact and the moving contact at the end of the micro switch <NUM> to disconnetct quickly. The transmission mechanism may be a structure such as a button, a lever, a roller, etc. Herein, no specific limitation is imposed on the transmission mechanism.

In some of the optional embodiments of the present disclosure, at least a part of the magnet assembly <NUM> is magnetic, and the stylus <NUM> has a built-in iron core, so that mutual attraction between the magnet assembly <NUM> and the stylus <NUM> may be realized, and further the stylus <NUM> may be located in a placement position.

In some other implementations, the stylus <NUM> may also have a built-in magnetic member, such as a magnet that is consistent with the extending direction of the stylus <NUM>, and magnetically adsorb the magnet assembly <NUM> through the magnet. Herein, there is no limitation on the type of the magnetic member.

<FIG> is a schematic diagram of force analysis of a device for detecting a fixation of a stylus according to an embodiment of the present disclosure. <FIG> is a schematic diagram of force analysis of another device for detecting a fixation of a stylus according to an embodiment of the present disclosure.

It should be noted that an attractive force generated by the stylus on the magnet assembly <NUM> is F1, a pressure generated by the micro switch <NUM> on the magnet assembly <NUM> is F2, a friction force generated between the magnet assembly <NUM> and the micro switch <NUM> is F4, and an elastic force generated by the elastic assembly <NUM> on the first support <NUM> is F3.

Specifically, in the device for detecting the fixation of the stylus according to this embodiment, during the process of placing the stylus <NUM> to the placement position, that is, during the process of the stylus <NUM> approaching the magnet assembly <NUM>, due to the mutual attraction between the magnet assembly <NUM> and the stylus <NUM>, and F1+F2>F4+2F3 at this time, the magnet assembly <NUM> moves away from the first support <NUM>, so that the magnet assembly <NUM> leaves a position where it abuts against the micro switch <NUM>. During the process of removing the stylus <NUM> from the placement position, that is, during the process of the stylus <NUM> being away from the magnet assembly <NUM>, under the elastic force of the elastic assembly <NUM>, and F1+F2<F4+2F3 at this time, and thus, the magnet assembly <NUM> and the first support <NUM> are close to each other, at least part of the magnet assembly <NUM> abuts against and triggers the micro switch <NUM>. During this process, the pressing and releasing of the magnet assembly <NUM> relative to the micro switch <NUM> is realized, so that the conversion between the electrical signals "<NUM>" and "<NUM>" is realized, and the use state of the stylus <NUM> is detected.

<FIG> is a schematic diagram of a three-dimensional structure of a first support in a device for detecting a fixation of a stylus according to an embodiment of the present disclosure. <FIG> is a schematic diagram of another three-dimensional structure of a first support in a device for detecting a fixation of a stylus according to an embodiment of the present disclosure. <FIG> is a schematic diagram of a three-dimensional structure of a second support in a device for detecting a fixation of a stylus according to an embodiment of the present disclosure.

As shown in <FIG>, in an optional implementation of this embodiment, the first support <NUM> has a first support body <NUM> and a first protrusion <NUM> connected to the first support body <NUM>, the magnet assembly <NUM> includes a second supports <NUM>, and the first protrusion <NUM> protrudes towards the second support <NUM>; the second support <NUM> has a second support body <NUM> and a second protrusion <NUM>, the second protrusion <NUM> protrudes towards the first support <NUM>, and the first protrusion <NUM> is movably connected to the second protrusion <NUM>; the elastic assembly <NUM> includes an elastic member <NUM>, and a first end of the elastic member <NUM> abuts against an end of the second protrusion <NUM>, a second end of the elastic member <NUM> abuts against the end of the first protrusion <NUM>, under an elastic force of the elastic member <NUM>, the end of the first protrusion <NUM> moves towards the second support <NUM>, the end of the second protrusion <NUM> moves towards the first support <NUM>, and the first support <NUM> and the second support <NUM> approach to each other.

Specifically, during the process of removing the stylus <NUM> from the placement position, that is, during the process of the stylus <NUM> moving away from the magnet assembly <NUM>, due to the existence of a part of structures in the second support <NUM> (such as the second protrusion <NUM>) extending to a side of the first support <NUM> being away from the second support <NUM>, or the existence of a part of the structure in the first support <NUM> extending to a side of the second support <NUM> being away from the first support <NUM>, the elastic force of the elastic member <NUM> promotes the corresponding parts of the second protrusion <NUM> and the first support <NUM> to move in opposite directions, so that the first support <NUM> and the second support <NUM> are close to each other, and therefore, at least part of the second support <NUM> abuts against the micro switch <NUM>, and detection of the state where the stylus <NUM> is at the placement position is realized.

It should be noted that, in order to process and manufacture the device for detecting the fixation of the stylus according to this embodiment, in this embodiment, both the first support <NUM> and the second support <NUM> are plastic parts that are easy to form.

Based on the different ways of fixing the elastic member <NUM> by the first support <NUM> and the second support <NUM>, correspondingly, the first support <NUM> and the second support <NUM> have different optional structures, which allows the elastic members <NUM> to have different installation and connection methods. Hereinafter, examples are taken for illustration.

In an optional installation method of an elastic member, the first protrusion <NUM> has a first through hole <NUM>, and the first through hole <NUM> passes through the first protrusion <NUM> and communicates with an inner cavity <NUM>; and the end of the second protrusion <NUM> extends from the first through hole <NUM> to a side of the first support body <NUM> being away from the second support body <NUM>.

Thus, due to the existence of the first through hole <NUM>, the second protrusion <NUM> in the second support <NUM> may extend from one side of the first support <NUM> to the other side. When the two ends of the elastic member <NUM> respectively abut against or connected to the second protrusion <NUM> and the first support <NUM> in other ways, the first support <NUM> and the second support <NUM> may approach to each other by the elastic force of the elastic member <NUM> itself.

At this time, an annular gap may be formed between the second protrusion <NUM> and the first through hole <NUM>. Optionally, the elastic member <NUM> is sleeved on an outer wall of the second protrusion <NUM>, and is positioned axially in a gap between an inner wall of the first through hole <NUM> and the outer wall of the second protrusion <NUM>.

In some optional embodiments, the first support body <NUM> has the hollow inner cavity <NUM>, the first through hole <NUM> communicates with the inner cavity <NUM>, and the second protrusion <NUM> may extend into the inner cavity <NUM>.

In some embodiments, the elastic member <NUM> may be a compression spring. It should be noted that, in general, the compression spring is used to push the object at the top of the compression spring from the center to the top, and to push the object at the bottom of the compression spring from the center to the bottom. In the present disclosure, the function of the elastic member <NUM> is to push the magnet assembly <NUM> at a first end of the elastic member <NUM> to a second end of the elastic member <NUM>, and to push the first support <NUM> at a second end of the elastic member <NUM> to a first end of the elastic member <NUM>, therefore, in the present disclosure, the force direction of the magnet assembly <NUM> and the first support <NUM> is opposite to that of the object at both ends of the compression spring in general.

Therefore, in the optional implementation of this embodiment, it is necessary to provide a limiting structure on the magnet assembly <NUM> or the first support <NUM> so as to complete the transformation of the direction of force between the magnet assembly <NUM> and the first support <NUM>.

<FIG> is a schematic diagram of a three-dimensional structure of a stopper in a device for detecting a fixation of a stylus according to an embodiment of the present disclosure.

As shown in <FIG>, <FIG>, <FIG>, <FIG>, in order to complete the transformation of the force direction of the magnet assembly <NUM> and the first support <NUM>, in the optional implementation of this embodiment, the elastic assembly <NUM> further includes a limiting member <NUM>, the limiting member <NUM> is arranged at the end of the second protrusion <NUM>; the limiting member <NUM> includes a limiting body <NUM>, a first clamping part <NUM> and a first stopping part <NUM>; the first clamping part <NUM> is arranged on an end of the limiting body <NUM> facing the second support <NUM>, the first stopping part <NUM> is arranged on an end of the limiting body <NUM> being away from the second support <NUM>, the first end of the first clamping part <NUM> connects with the limiting body <NUM>, the second end of the first clamping part <NUM> extends towards the micro switch <NUM>, the second protrusion <NUM> has a through hole <NUM> communicating with the end of the second protrusion <NUM>, the inner wall of the through hole <NUM> has a stepped surface <NUM>, the first clamping part <NUM> extends into the through hole <NUM>, and the second end of the first clamping part <NUM> abuts against the stepped surface <NUM> to clamp the second protrusion <NUM> with the limiting member <NUM>, so that the force generated by the elastic member <NUM> on the magnet assembly <NUM> may promote the movement of the magnet assembly <NUM> to the side of the first support <NUM>, and further at least part of the magnet assembly <NUM> may collide with the micro switch <NUM>.

In order to improve the quickness of the installation between the limiting member <NUM> and the second support <NUM>, in the embodiment of the present disclosure, the limiting member <NUM> may also be a plastic part that may produce a large amount of deformation, so that not only the fast connection between the limiting member <NUM> and the second support <NUM>, but also the reliable connection between the limiting member <NUM> and the second support <NUM> may be realized.

In some optional embodiments, the limiting body <NUM> is a columnar body, such as a prism or a cylinder, and the first clamping part <NUM> may be an annular plate-shaped member or include a plurality of inclined plates <NUM> arranged at intervals; the first stopping part <NUM> may be a plate-shaped member.

In the optional implementation of this embodiment, the limiting body <NUM> is a quadrangular prism; the limiting body <NUM> has a plurality of first clamping parts <NUM> distributed along its axial direction, and the first clamping parts <NUM> include a plurality of inclined plates <NUM> arranged at intervals, and the inclined plates are connected to the corresponding side wall surface of the limiting body <NUM>, and an interval <NUM> is formed between adjacent inclined plates <NUM>, and in the axial direction of the limiting body <NUM>, of two adjacent first clamping parts <NUM>, the inclined plates <NUM> of one is opposite to the interval <NUM> of the other. In addition, the first clamping part <NUM> on the side close to the first stopping part <NUM> abuts against the stepped surface <NUM>; both end surfaces of the first stopping part <NUM> protrude in a direction being away from the limiting body <NUM>.

It should be noted that the limiting body <NUM>, the first clamping part <NUM> and the first stopping part <NUM> may also have structures of other shapes, and the optional shape of the limiting member <NUM> in other embodiments is not limited herein.

In order to ensure that at least part of the magnet assembly <NUM> may effectively press and release the micro switch <NUM> to realize conversion between electrical signals "<NUM>" and "<NUM>". In the optional implementation of this embodiment, the triggering part <NUM> is located on the second support <NUM>, the triggering part <NUM> is located between the two second protrusions <NUM>, the first support <NUM> has a guiding hole <NUM>, the guiding hole <NUM> is located between the two first protrusions <NUM>, and the guiding hole <NUM> communicates with the first through hole <NUM>, and the end of the triggering part <NUM> may pass through the guiding hole <NUM> and collide with the micro switch <NUM>.

As an optional embodiment, the guiding hole <NUM> is a square hole, and the triggering part <NUM> has a conical structure, and a radial dimension of the triggering part <NUM> gradually decreases from the root to the end.

In order to limit the axial position of the elastic member <NUM>, a length of the first stopping part <NUM> in the radial direction of the second protrusion <NUM> is greater than a diameter of the second protrusion <NUM>, and the first end of the elastic member <NUM> abuts against the side of the first stopping part <NUM> facing the first clamping part <NUM>, an end of the first protrusion <NUM> has a second stopping part <NUM> protruding inward, and a second end of the elastic member <NUM> abuts against the second stopping part <NUM>. Thus, the axial position of the elastic member <NUM> may be limited, and the stability of the elastic member <NUM> may be improved.

Further, in order to limit the radial position of the elastic member <NUM>, as an optional embodiment, a radial edge of the first stopping part <NUM> protrudes in a direction being away from the micro switch <NUM>, and a first end of the elastic member <NUM> abuts against a region surrounded by the radial edge of the first stopping part <NUM>. Thus, the stability of the elastic member <NUM> may be further improved to prevent the elastic member <NUM> from moving.

In order to further limit the position of the elastic member <NUM>, in this embodiment, the through hole <NUM> and the first through hole <NUM> are both circular holes, and the through hole <NUM> and the first through hole <NUM> are concentrically arranged, thus, it is possible to further effectively limits the position of the elastic member <NUM>.

<FIG> is a schematic diagram of a three-dimensional structure of another first support in a device for detecting a fixation of a stylus according to an embodiment of the present disclosure.

<FIG> is a schematic plan view of another first support in a device for detecting a fixation of a stylus according to an embodiment of the present disclosure. <FIG> is a schematic diagram of a connection relationship between the second support and the elastic member in another device for detecting a fixation of a stylus according to an embodiment of the present disclosure. <FIG> is a schematic diagram of a three-dimensional structure of another second support in a device for detecting a fixation of a stylus according to the embodiment of the present disclosure.

As shown in <FIG>, <FIG>, <FIG>, <FIG>, in another optional installation method of the elastic member <NUM>, a hole or cavity structure may be provided on the second protrusion <NUM>, and the second protrusion <NUM> extends into the cavity structure of the second protrusion <NUM>. Specifically, the second protrusion <NUM> has a second through hole <NUM>, and the second through hole <NUM> passes through an end of the second protrusion <NUM> facing the first support body <NUM>; the first protrusion <NUM> extends into the second through hole <NUM>; a stepped part <NUM> is disposed within the second through hole <NUM>, and the elastic member <NUM> abuts between the end surface <NUM> of the stepped part and the end of the first protrusion <NUM>.

At this time, the first protrusion <NUM> of the first support <NUM> may extend from one side of the second support <NUM> to the other side, that is, part of the structure in the second support <NUM>, such as the stepped part <NUM> will be located on the first support body <NUM> and the first protrusion <NUM>. Correspondingly, similar to the installation method of the former elastic member <NUM>, when the elastic member <NUM> abuts between the stepped part <NUM> and the end of the first protrusion <NUM>, the elastic force of the elastic member <NUM> itself may make the first support <NUM> close to the second support <NUM>.

In order to allow the first protrusion <NUM> to freely pass through the second through hole <NUM> and maintain a stable connection with the elastic member <NUM>, optionally, the first protrusion <NUM> includes at least two elastic supporting columns 12a extending along a length direction of the first protrusion <NUM>, a gap is presented between at least two elastic supporting columns 12a, and the end of the elastic supporting column 12a has an abutting flange <NUM>, and the elastic member <NUM> abuts between the end surface <NUM> of the stepped part and the abutting flange <NUM>.

Thus, during the process of passing through the second through hole <NUM>, the elastic supporting column 12a may be pressed inwardly under the pressure of the hole wall of the second through hole <NUM> or the inner edge of the elastic member <NUM>, so as to pass through the second through hole <NUM> smoothly; and after passing through the second through hole <NUM>, the elastic supporting column 12a expands outward freely, so that the abutting flange <NUM> may reliably abut against the end of the elastic member <NUM>.

In some optional embodiments, the outer contour of the cross-sectional figure of the elastic supporting column 12a along its radial direction is a semi-elliptical outer peripheral contour or a semicircular outer peripheral contour. Herein, there are no specific restrictions on the cross-sectional shape of the elastic supporting column 12a along its radial direction.

As an optional structure, a side of the abutting flange <NUM> facing away from the first support body <NUM> has a chamfer <NUM>; a side of the abutting flange <NUM> facing the first support body <NUM> has an abutting end surface <NUM>. Through the guiding effect of the chamfer <NUM>, the elastic supporting column 12a may be prevented from colliding with structures such as elastic member <NUM> and from advancing when passing through the second through hole <NUM>, and at the same time, the abutting end surface <NUM> of the abutting flange <NUM> may also reliably fix the elastic member <NUM>, thereby facilitating the elastic member <NUM> applying elastic force. The direction of the abutting end surface <NUM> and the length direction of the elastic supporting column 12a may be kept perpendicular to each other.

In order to allow the elastic supporting column 12a to move in a predetermined direction, optionally, the elastic supporting column 12a has a sliding section <NUM>, a radial dimension of the sliding section <NUM> matches an inner edge dimension of the stepped part <NUM>, and a length of the sliding section <NUM> in an axial direction of the first protrusion <NUM> is greater than a sum of a thickness of the stepped part <NUM> and a moving stroke of the second support <NUM> in this axial direction. In this way, the sliding section <NUM> may cooperate with the shape of the second through hole <NUM> to maintain the position of the elastic supporting column 12a in the second through hole <NUM>. At the same time, the sliding section <NUM> has a longer length in the axial direction of the first protrusion <NUM>, which can avoid structural interference and collision when the first support <NUM> and the second support <NUM> move relative to each other, thereby maintaining a smooth moving effect.

Correspondingly, in an optional manner, a positioning block <NUM> may be provided on the second support <NUM>, and a shape of the positioning block <NUM> may match the gap between the plurality of elastic supporting columns 12a, so as to match the second through hole <NUM> to further position the elastic supporting column 12a.

In this embodiment, there may be two elastic supporting columns 12a, and the two elastic supporting columns 12a are arranged symmetrically. In this way, when an external pressure is applied to the two elastic supporting columns 12a, they may move closer to each other so as to pass through the second through hole <NUM>, and in addition, the elastic supporting columns 12a may be more balanced in force. It may be understood that the number of elastic supporting columns 12a may also be other numbers, such as three, and the plurality of elastic supporting columns 12a are arranged symmetrically or axially symmetrically with respect to the axial direction of the second through hole <NUM> for being balanced in force.

Since an opening of the second through hole <NUM> is provided with the stepped part <NUM>, and in order to ensure the abutting and fixing effect on the elastic member <NUM>, an inner edge dimension of the stepped part <NUM> is smaller than the dimension of the elastic member <NUM> in this direction. At this time, in order to facilitate the installation of the elastic member <NUM>, optionally, the second protrusion <NUM> is provided with an installation groove <NUM>, and the installation groove <NUM> communicates with the second through hole <NUM>, so that the elastic member <NUM> enters into and exits from the second through hole <NUM> through the installation groove <NUM>. Specifically, the installation groove <NUM> is opened on a side wall of the second protrusion <NUM>.

In order to ensure the stability of the magnetic assembly <NUM> during the movement, in this embodiment, the number of elastic assemblies <NUM> is two, and a distribution direction of the two elastic assemblies <NUM> is consistent with an extension direction of the stylus <NUM>, and the number of the second protrusions <NUM> is two, and the second protrusions <NUM> are arranged corresponding to the elastic assemblies <NUM>. Specifically, the two elastic assemblies <NUM> and the two second protrusions <NUM> are axially symmetrical with respect to the center line of the second support <NUM>.

In order to facilitate the connection between the device for detecting the fixation of the stylus and the electronic apparatus, optionally, opposite sides of the first support body <NUM> are respectively provided with a hand buckle <NUM> and a clamping part <NUM>, and the clamping part <NUM> is used to clamp with the housing of the electronic apparatus, the hand buckle <NUM> is used to abut against an end of the housing of the electronic apparatus opposite to the clamping part <NUM>, and at least a part of the hand buckle <NUM> is exposed outside the housing of the electronic apparatus.

In some optional embodiments, the hand buckle <NUM> protrudes from the first support body <NUM>, and the extension direction of the hand buckle <NUM> is consistent with the length direction of the first support body <NUM>, and the hand buckle <NUM> is provided with a fixed hole <NUM>, and the hand buckle <NUM> is detachably connected to the housing of the electronic apparatus through a threaded fastener passing through the fixing hole <NUM>. It should be noted that the hand buckle <NUM> is also connected to the housing of the electronic apparatus in other connection methods, and there is no limitation on the connection method between the hand buckle <NUM> and the housing of the electronic apparatus herein.

Further, in some embodiments, the clamping part <NUM> includes an extension arm <NUM> and a clamping arm <NUM>. The extension arm <NUM> includes a first extending part <NUM> and a second extending part <NUM> connected in sequence. A first end of the first extending part <NUM> is connected to the first support body <NUM>, a second end of the first extending part <NUM> extends in direction being away from the first support body <NUM>, and the extension direction of the first extending part <NUM> is consistent with the height direction of the first support body <NUM>. A first end of the second extending part <NUM> is connected to the second end of the first extending part <NUM>, and a second end of the second extending part <NUM> extends to the side of the first support body <NUM> along its length direction, so that a certain angle is formed between the first extension extending part <NUM> and the second extending part <NUM>. The clamping arm <NUM> includes a first clamping arm <NUM> and a second clamping arm <NUM>. The first clamping arm <NUM> and the second clamping arm <NUM> are connected to the second extending part <NUM>, the first clamping arm <NUM> and the second clamping arm <NUM> are distributed parallel in a height direction of the first support body <NUM>, and the extension directions of the first clamping arm <NUM> and the second clamping arm <NUM> are consistent with the length direction of the first support body <NUM>, and a slot <NUM> is formed between the first clamping arm <NUM> and the second clamping arm <NUM>. The housing of the electronic apparatus may extend into the slot <NUM> and be connected to the clamping part <NUM>.

In order to realize the magnetic adsorption between the magnet assembly <NUM> and the stylus <NUM>, in this embodiment, the magnet assembly <NUM> further includes an adsorbing member <NUM> that may magnetically absorb with the stylus <NUM>. Optionally, the adsorbing member <NUM> may be a magnet or an iron core. When the adsorbing member <NUM> is a magnet, the stylus <NUM> may have a built-in iron core or magnet. When the adsorbing member <NUM> is an iron core, the stylus <NUM> may have a built-in magnet.

However, in actual production, a device for detecting a fixation of a stylus is installed on a display apparatus, and the display apparatus may be equipped with a plurality of stylus <NUM>, that is, the actual number of styluses <NUM> may be far more than the device for detecting the fixation of the stylus, and considering the high cost of the magnet, in the implementation of this embodiment, the adsorbing member <NUM> is a magnet, and the stylus <NUM> has a built-in iron core.

As shown in <FIG>, in order to install the adsorbing member <NUM> on the second support <NUM>, in some embodiments, a side of the second support <NUM> being away from the micro switch <NUM> has an installing cavity <NUM>, the installing cavity <NUM> has a top cavity wall <NUM> facing the micro switch <NUM> and a bottom cavity wall <NUM> being away from the micro switch <NUM>, a length direction of the installing cavity <NUM> is perpendicular to a moving direction of the magnet assembly <NUM>, a lateral cavity wall of the installing cavity <NUM> along the length direction has an opening <NUM>, and the adsorbing member <NUM> is installed in the installing cavity <NUM> through the opening <NUM>.

In this way, not only the adsorbing member <NUM> may be installed on the second support <NUM>, but also the adsorbing member <NUM> may be installed in the installing cavity <NUM> in the width direction of the second support <NUM>, so that during the manufacturing process of the second support <NUM>, it may be ensured that the opening direction of the cavity is consistent with the installation direction of the adsorbent <NUM>, so as to prevent the cavity from opening along the length direction of the second support <NUM>, thereby avoiding difficulty during injection molding of the second support <NUM> due to the high depth of the cavity.

In order to realize the reliable connection between the adsorbing member <NUM> and the second support <NUM>, in this embodiment, the bottom cavity wall <NUM> of the installing cavity <NUM> has a second clamping part <NUM>, and the second clamping part <NUM> is used to limit the adsorbing member <NUM> in the installing cavity <NUM>.

In addition, as compared the opening direction of the above-mentioned installing cavity <NUM> with opening along the thickness direction of the second support <NUM>, when the outer wall surface of the bottom cavity wall <NUM> is a main force-bearing surface, the above-mentioned opening direction can prevent the adsorbing member <NUM> from coming off, therefore, the overall reliability of the magnet assembly <NUM> can be improved. Moreover, if the cavity is opened along the thickness direction of the second support <NUM>, considering the convenience of installation, the thickness of the second clamping part <NUM> becomes larger at this time, which will increase the distance between the adsorbing member <NUM> and the built-in iron core of the stylus <NUM>, affecting the magnitude of the absorbing force generated by the adsorbing member <NUM> on the stylus <NUM>, thereby affecting the holding feel of the stylus <NUM> when the stylus <NUM> is taken off.

In the optional implementation of this embodiment, in order to realize the conversion of the micro switch <NUM> between the electrical signals "<NUM>" and "<NUM>", in this embodiment, the switch assembly <NUM> further includes a circuit board <NUM>, the circuit board <NUM> is mounted on the first support <NUM>, the micro switch <NUM> is connected to the circuit board <NUM>, and the micro switch <NUM> is electrically connected to the circuit board <NUM>.

In order to facilitate the installation of the circuit board <NUM> on the first support <NUM>, the device for detecting the fixation of the stylus according to this embodiment further includes a plurality of positioning ribs <NUM>, the plurality of positioning ribs <NUM> are arranged in the inner cavity <NUM>, and the plurality of positioning ribs <NUM> are distributed on both sides of the circuit board <NUM> along the length direction of the first support <NUM>, and ends of the positioning ribs <NUM> extend away from the second support <NUM>. Thereby, the positioning ribs <NUM> can guide the installation of the circuit board <NUM>, so as to realize quick installation between the circuit board <NUM> and the first support <NUM>.

In order to further realize the fast installation between the circuit board <NUM> and the first support <NUM>, the side of the positioning rib <NUM> facing the circuit board <NUM> has a guiding slope <NUM>, and the guiding slope <NUM> extends from a root of the positioning rib <NUM> to an end of the positioning rib <NUM>. In this way, the installation of the circuit board <NUM> may be further guided, and the rapid installation between the circuit board <NUM> and the first support <NUM> can be further realized.

In order to reliably install the circuit board <NUM> on the first support <NUM>, as an optional embodiment, a side of the first support <NUM> being away from the second support <NUM> has two third clamping parts <NUM>, that is, the side of the inner cavity <NUM> being away from the second support <NUM> has two third clamping parts <NUM>, a distribution direction of the two third clamping parts <NUM> is consistent with an extension direction of the cavity bottom of the installing cavity <NUM>, and the two third clamping parts <NUM> are used to limit the circuit board <NUM> within the first support <NUM>.

In order to facilitate the injection molding of the first support <NUM>, in this embodiment, the third clamping part <NUM> is located in the middle of the first support <NUM>, since the touch direction of the first support <NUM> during the molding process is along its height direction, by positioning the third clamping part <NUM> in the middle of the first support <NUM>, it may be ensured that the hole where the third clamping part <NUM> is located coincides with the hole where the micro switch <NUM> is located during the touch process. Compared with the arranging position of other third clamping part <NUM>, the arranging position of the third clamping part <NUM> in this embodiment may not only ensure that the ejection direction of the first support <NUM> is single, but also avoid processing additional hole positions on the first support <NUM>, which ensures the integrity of the first support <NUM> and further improves the reliability of the first support <NUM>. In addition, the mold for manufacturing the first support <NUM> can be made simpler and the manufacturing cost can be saved.

However, the device for detecting the fixation of the stylus according to this embodiment is mostly in a flat state during use, that is, the opening <NUM> is vertically upward, under the influence of gravity, in order to prevent changes in the shape of the first support <NUM> and the second support <NUM> which leads to a change in the attractive force of the adsorbing member <NUM> to the stylus <NUM>, in the device for detecting the fixation of the stylus according to this embodiment, there are further a plurality of reinforcing ribs <NUM>, the plurality of reinforcing ribs <NUM> include a first reinforcing rib 6a, a second reinforcing rib 6b and a third reinforcing rib 6c. The first reinforcing rib 6a is arranged on the first support <NUM>, the second reinforcing rib 6b and the third reinforcing rib 6c are arranged on the second support <NUM>. The ends of both the second reinforcing rib 6b and the third reinforcing rib 6c extend towards the first support <NUM>, the second protrusion <NUM> is located between the second reinforcing rib 6b and the third reinforcing rib 6c, and the third reinforcing rib 6c is located on a side of the second support <NUM> close to a center of the second protrusion <NUM>; the end of the first reinforcing rib 6a extends towards the second support <NUM>, and the first reinforcing rib 6a is located on the side of the second reinforcing rib 6b being away from the second protrusion <NUM>. In this way, the strength of the first support <NUM> and the second support <NUM> can be enhanced to ensure that the adsorbing member <NUM> can generate effective attraction to the stylus <NUM>.

The device for detecting a fixation of a stylus according to the present disclosure includes a first support, a switch assembly, a magnet assembly and an elastic assembly, the switch assembly is arranged on the first support; the side of the magnet assembly being away from the first support is used to adsorb the stylus; the switch assembly includes a micro switch, the micro switch includes a triggering button, the triggering button is arranged facing the magnet assembly, and the magnet assembly includes a triggering part; the magnet assembly is movably connected with the first support, and the elastic assembly is arranged at a movable joint between the magnet assembly and the first support. When the device for detecting the fixation of the stylus detects the stylus, the magnet assembly is away from the first support under an action of an adsorption force of the stylus, and the triggering part does not contact with the triggering button; when the device for detecting the fixation of the stylus does not detect the stylus, the elastic assembly causes the magnet assembly and the first support to be in a bonding state, and the triggering part contacts with the triggering button. The device for detecting the fixation of the stylus according to the present disclosure can detect the state of the stylus stably and effectively.

<FIG> is a schematic structural diagram of an intelligent interactive board according to an embodiment of the present disclosure. <FIG> is a schematic diagram of a partial structure of an intelligent interactive board according to an embodiment of the present disclosure. <FIG> is a schematic diagram of a partially enlarged structure at A in <FIG>. <FIG> is a cross-sectional view along a B-B direction of <FIG>. <FIG> is another cross-sectional view along the B-B direction of <FIG>. <FIG> is a schematic diagram of a partially enlarged structure at C in <FIG> is a schematic diagram of a partially enlarged structure at D in <FIG>.

As shown in <FIG>, according to the embodiment of the present disclosure, an intelligent interactive board is further provided, including a frame <NUM>, a stylus <NUM> and the above-mentioned detection device, the device for detecting the fixation of the stylus is arranged inside the frame <NUM>, and the first support <NUM> of the device for detecting the fixation of the stylus is fixedly connected with the frame <NUM>, at least a part of the frame <NUM> is formed with an installing part <NUM>, and the stylus <NUM> is placed on the installing part <NUM>. The optional structure, function, and working principle of the device for detecting the fixation of the stylus have been described in detail in the above-mentioned embodiments, so details will not be repeated herein.

Alternatively, in this embodiment, the installing part <NUM> is a groove recessed toward the magnet assembly <NUM>.

Claim 1:
A device for detecting a fixation of a stylus (<NUM>), comprising:
a first support (<NUM>);
a switch assembly (<NUM>) arranged on the first support;
a magnet assembly (<NUM>) wherein a side of the magnet assembly being away from the first support is used to adsorb the stylus (<NUM>); and
an elastic assembly (<NUM>),
characterized in that
the switch assembly (<NUM>) comprises a micro switch (<NUM>), the micro switch (<NUM>) comprises a triggering button, the triggering button of the micro switch (<NUM>) is arranged facing the magnet assembly (<NUM>), and the magnet assembly (<NUM>) comprises a triggering part (<NUM>); the magnet assembly (<NUM>) is movably connected with the first support (<NUM>), and the elastic assembly (<NUM>) is arranged at a movable joint between the magnet assembly (<NUM>) and the first support (<NUM>);
when the device detects the stylus (<NUM>), the magnet assembly (<NUM>) is away from the first support (<NUM>) under an action of an adsorption force of the stylus (<NUM>), and the triggering part (<NUM>) does not contact with the triggering button;
when the device does not detect the stylus (<NUM>), the elastic assembly (<NUM>) causes the magnet assembly (<NUM>) and the first support (<NUM>) to be in a bonding state, and the triggering part (<NUM>) contacts with the triggering button.