Patent Description:
In general, a terminal board, of which another name is a terminal block, is provided with an input terminal to connect electric wires with a partition wall in between and to carry an electric current, and output terminals are coupled to respective ends of the electric wires to be connected and fixed to the input terminal of the terminal block via a fixing screw so that an electric current is applied.

Document <CIT> describes a conductor connection device that interposes a flat washerlike pressure sensor between a bolt and one of the bearing surface of the conductor that allows a coupling bolt to apply pressure in the sensor while maintaining the connection between terminals.

For example, <CIT> discloses a terminal board for connecting an electric wire of one touch type, wherein through an output terminal fixing screw, an output terminal coupled to an end of the electric wire is connected to an input terminal, the input terminal being bent with a central partition wall in the middle and being fixed to a terminal block via an input terminal fixing screw. In the terminal board for connecting the electric wire, an upper moving piece above the input terminal and a lower moving piece below the input terminal are fastened by the output terminal fixing screw and assembled and fixed. In the meantime, an upper spring is provided between the upper moving piece and the input terminal, and also, a lower spring is provided between the lower moving piece and the terminal block. Accordingly, as the output terminal fixing screw pushes, the upper moving piece and the lower moving piece are elastically moved with respect to the input terminal fixed in position.

As another example, <CIT> discloses an electric wire terminal connection board including: a power distribution board having an upper surface on which a terminal mounting board is formed protruding; a conductive plate coupled to an upper surface of the terminal mounting board, and having an upper part in which a recess is formed so that an electrode terminal is mounted therein; and a cover coupled to an upper part of the conductive plate and fastened covering the electrode terminal.

In this way, in general, a terminal allowing an electric wire to be connected to carry an electric current places an electric wire of which a jacket is removed, namely, a conductor of a cable, between a lower conductive plate and an upper conductive plate, and tightens a fixing screw at the upper conductive plate, thereby maintaining a stable coupling state.

That is, in the terminal, the upper conductive plate is moved in the direction of the lower conductive plate by the clamping force of the fixing screw, and the electric wire, namely, the cable, is thus pressed and fixed. Accordingly, the clamping force of the fixing screw changes the coupling state of the cable, and the stably formed clamping force of the fixing screw achieves the stable coupling state of the cable.

However, there is a phenomenon that an external impact or vibration on the conventional terminal causes the fixing screw to be loosen little by little. Thus, the space between the lower conductive plate and the upper conductive plate is further increased, and the electric wire, namely, the conductor of the cable, is unstably coupled between the upper conductive plate and the lower conductive plate, resulting in a fire caused by Joule heating.

The present disclosure has been made keeping in mind the above problems occurring in the related art, wherein in a terminal for connecting an electric wire, in other words, a cable, a fixing screw is loosened by an external impact, etc. and a contact area between a conductor of the electric wire cable and the terminal is reduced, resulting in a problem of the occurrence of a fire caused by Joule heating, in the related art;.

The present disclosure is directed to providing a system for measuring terminal connection or disconnection and pressure by using a pressure sensor and a method for measuring terminal connection or disconnection and pressure, wherein the pressure sensor is provided to measure the pressure between a pair of terminals for fixing and connecting a cable and a clamping force of a coupling bolt is easily determined by using the pressure sensor, so that when the clamping force of the coupling bolt is weakened because of an external impact, etc., it is easy to perform maintenance, thus preventing a fire caused by Joule heating.

To achieve the desired objective as described above, the present disclosure provides a system for measuring terminal connection or disconnection and pressure by using a pressure sensor, the system including: a lower terminal through which a first coupling hole is formed on a first side thereof, the first coupling hole corresponding to an installation hole formed in a base frame of an electronic device; the pressure sensor of which a lower part is coupled to an upper part of the lower terminal on a second side thereof; an upper terminal through which a second coupling hole is formed on a first side thereof and a fastening hole is formed on a second side thereof, the second coupling hole corresponding to the first coupling hole and the fastening hole being at a position corresponding to the pressure sensor; a coupling bolt coupled into the installation hole of the base frame by screw-type engagement, passing through the second coupling hole of the upper terminal and the first coupling hole of the lower terminal; and a pressure bolt coupled into the fastening hole of the upper terminal by screw-type engagement, and configured to apply pressure to the pressure sensor.

In addition, the present disclosure may further include: a controller configured to receive pressure information measured from the pressure sensor; and a display configured to receive the pressure information from the controller and display the pressure information.

In addition, the upper terminal of the present disclosure may include: a body through which the second coupling hole corresponding to the first coupling hole is formed; a bent part formed extending on a side of the body and formed in a shape bent upwards in a direction of the side; and a separation part formed extending on a side of the bent part in a direction of the side, and provided with the fastening hole that is formed at the position corresponding to the pressure sensor and through the separation part.

In addition, the upper terminal of the present disclosure may include: a first reinforcing bead formed thereon between the body and the bent part; and a plurality of second reinforcing beads formed starting from a lower surface of the bent part to a lower surface of the separation part.

In addition, the pressure sensor of the present disclosure may include: a lower insulation of which a lower part is coupled to the upper part of the lower terminal on the second side thereof; a sensor positioned on the lower insulation; and an upper insulation coupled above the lower insulation such that a lower surface of the upper insulation is in contact with the sensor.

In addition, in the present disclosure, the lower insulation may be provided with a lower mounting recess in an upper surface thereof, into which a lower part of the sensor is inserted, and the upper insulation may be provided with an upper mounting recess in the lower surface thereof, into which an upper part of the sensor is inserted.

In addition, in the present disclosure, the lower insulation may be provided with a lower mounting recess in an upper surface thereof, into which the sensor is inserted, and the upper insulation may be coupled as a lower part thereof is inserted into the lower mounting recess.

In addition, to achieve the desired objective as described above, the present disclosure provides a method for measuring terminal connection or disconnection and pressure by using a pressure sensor, the method including: a first step in which the lower terminal is positioned on the base frame of the electronic device, the upper terminal is provisionally coupled above the lower terminal by using the coupling bolt, and the pressure bolt is provisionally coupled to the upper terminal; after the first step, a second step in which a conductor of a cable is positioned between the lower terminal and the upper terminal, the coupling bolt is tightened to cause the upper terminal to be in contact with the conductor of the cable such that pressure applied to the conductor of the cable by clamping force of the coupling bolt is <NUM>, and the pressure bolt is tightened to cause a lower part of the pressure bolt to be in contact with an upper part of the pressure sensor such that pressure applied to the pressure sensor is <NUM>; and after the second step, a third step in which the coupling bolt is tightened to fix the conductor of the cable between the lower terminal and the upper terminal, wherein the coupling bolt is tightened such that pressure caused by the pressure bolt measured by the pressure sensor reaches a preset pressure.

According to the system for measuring terminal connection or disconnection and pressure by using the pressure sensor and the method for measuring terminal connection or disconnection and pressure according to the present disclosure provided as described above, the clamping force of the coupling bolt coupled to a pair of terminals to fix and connect the cable is measured through the pressure sensor and the pressure bolt for pressing the pressure sensor, so that a state of the clamping force of the coupling bolt, specifically, the coupling state of the cable, is easily determined, thus preventing a fire caused by Joule heating from occurring because the clamping force of the coupling bolt is weakened.

In addition, according to the present disclosure, the state of the clamping force of the coupling bolt, that is, the coupling state of the cable through a pair of terminals, can be easily determined, so that when the clamping force of the coupling bolt is weakened, it is easy to perform maintenance for recovering the clamping force of the coupling bolt.

In addition, according to the present disclosure, the clamping force of the coupling bolt, specifically, the pressure applied to the cable by the upper of a pair of terminals, is more easily determined through the controller and the display.

In addition, according to the present disclosure, the pressure sensor is provided, and the pressure bolt is used for generating the pressure corresponding to the clamping force of the coupling bolt by pressing the pressure sensor, thereby facilitating installation.

In addition, according to the present disclosure, a change in the pressure measured by the pressure sensor according to a predetermined rotation angle can be easily determined through a position detection sensor for measuring the rotation angle of the pressure bolt, and accordingly, the coupling bolt is tightened again to a required pressure, whereby the cable can be more easily fixed with a preset clamping force.

The present disclosure relates to a system for measuring a coupling force of a pair of terminals, namely, a lower terminal <NUM> and an upper terminal <NUM>, for fixing and connecting an electric wire, namely, a cable <NUM>, through a pressure sensor <NUM> so as to easily determine a coupling state of the cable <NUM> fixed between the lower terminal <NUM> and the upper terminal <NUM> and to maintain a stable coupling state, specifically, keep the coupling force of the lower terminal <NUM> and the upper terminal <NUM> stable. More specifically, disclosed is a technology related to a system for measuring terminal connection or disconnection and pressure by using a pressure sensor and to a method for measuring terminal connection or disconnection and pressure, wherein when between the lower terminal <NUM> and the upper terminal <NUM> coupled to a base frame <NUM> of an electronic device through a coupling bolt <NUM>, a conductor covered by the cable <NUM> is fixed by the compressive force of the upper terminal <NUM> and is electrically connected, a pressure bolt <NUM> coupled to the upper terminal <NUM> by screw-type engagement applies pressure to the pressure sensor <NUM> provided at the lower terminal <NUM>, so that the compressive force of the upper terminal <NUM>, specifically, the clamping force of the coupling bolt <NUM> causing the compressive force of the upper terminal <NUM> is easily determined through the pressure bolt <NUM> and the pressure sensor <NUM>, thereby preventing a fire caused by Joule heating that may occur because the coupling bolt <NUM> is loosened as time passes.

In order to achieve the present invention as described above, a system for measuring terminal connection or disconnection and pressure by using a pressure sensor includes: a lower terminal <NUM> through which a first coupling hole <NUM> is formed on a first side thereof, the first coupling hole <NUM> corresponding to an installation hole <NUM> formed in a base frame <NUM> of an electronic device; the pressure sensor <NUM> of which a lower part is coupled to an upper part of the lower terminal <NUM> on a second side thereof; an upper terminal <NUM> through which a second coupling hole <NUM> is formed on a first side thereof and a fastening hole <NUM> is formed on a second side thereof, the second coupling hole <NUM> corresponding to the first coupling hole <NUM> and the fastening hole <NUM> being at a position corresponding to the pressure sensor <NUM>; a coupling bolt <NUM> coupled into the installation hole <NUM> of the base frame <NUM> by screw-type engagement, passing through the second coupling hole <NUM> of the upper terminal <NUM> and the first coupling hole <NUM> of the lower terminal <NUM>; and a pressure bolt <NUM> coupled into the fastening hole <NUM> of the upper terminal <NUM> by screw-type engagement, and configured to apply pressure to the pressure sensor <NUM>.

In addition, the present disclosure includes: a controller <NUM> configured to receive pressure information measured from the pressure sensor <NUM>; and a display <NUM> configured to receive the pressure information from the controller <NUM> and display the pressure information.

In addition, the upper terminal <NUM> of the present disclosure includes: a body <NUM> through which the second coupling hole <NUM> corresponding to the first coupling hole <NUM> is formed; a bent part <NUM> formed extending on a side of the body <NUM> and formed in a shape bent upwards in a direction of the side; and a separation part <NUM> formed extending on a side of the bent part <NUM> in a direction of the side, and provided with the fastening hole <NUM> that is formed at the position corresponding to the pressure sensor <NUM> and through the separation part <NUM>.

In addition, the upper terminal <NUM> of the present disclosure includes: a first reinforcing bead <NUM> formed thereon between the body <NUM> and the bent part <NUM>; and a plurality of second reinforcing beads <NUM> formed starting from a lower surface of the bent part <NUM> to a lower surface of the separation part <NUM>.

In addition, the pressure sensor <NUM> of the present disclosure includes: a lower insulation <NUM> of which a lower part is coupled to the upper part of the lower terminal <NUM> on the second side thereof; a sensor <NUM> positioned on the lower insulation <NUM>; and an upper insulation <NUM> coupled above the lower insulation <NUM> such that a lower surface of the upper insulation <NUM> is in contact with the sensor <NUM>.

In addition, in the present disclosure, the lower insulation <NUM> is provided with a lower mounting recess <NUM> in an upper surface thereof, into which a lower part of the sensor <NUM> is inserted, and the upper insulation <NUM> is provided with an upper mounting recess <NUM> in the lower surface thereof, into which an upper part of the sensor <NUM> is inserted.

In addition, in the present disclosure, the lower insulation <NUM> is provided with a lower mounting recess <NUM> in an upper surface thereof, into which the sensor <NUM> is inserted, and the upper insulation <NUM> is coupled as a lower part thereof is inserted into the lower mounting recess <NUM>.

In order to achieve the present invention as described above, a method for measuring terminal connection or disconnection and pressure by using the pressure sensor includes: a first step in which the lower terminal <NUM> is positioned on the base frame <NUM> of the electronic device, the upper terminal <NUM> is provisionally coupled above the lower terminal <NUM> by using the coupling bolt <NUM>, and the pressure bolt <NUM> is provisionally coupled to the upper terminal <NUM>; after the first step, a second step in which a conductor of a cable <NUM> is positioned between the lower terminal <NUM> and the upper terminal <NUM>, the coupling bolt <NUM> is tightened to cause the upper terminal <NUM> to be in contact with the conductor of the cable <NUM> such that pressure applied to the conductor of the cable <NUM> by clamping force of the coupling bolt <NUM> is <NUM>, and the pressure bolt <NUM> is tightened to cause a lower part of the pressure bolt <NUM> to be in contact with an upper part of the pressure sensor <NUM> such that pressure applied to the pressure sensor <NUM> is <NUM>; and after the second step, a third step in which the coupling bolt <NUM> is tightened to fix the conductor of the cable <NUM> between the lower terminal <NUM> and the upper terminal <NUM>, wherein the coupling bolt <NUM> is tightened such that pressure caused by the pressure bolt <NUM> measured by the pressure sensor <NUM> reaches a preset pressure.

Hereinafter, the present disclosure will be described in detail with reference to <FIG> showing embodiments of the present disclosure.

First, a pair of terminals, that is, a lower terminal <NUM> and an upper terminal <NUM>, of the present disclosure are coupled to a base frame <NUM> of an electronic device via a coupling bolt <NUM>, which will be described later. Between the lower terminal <NUM> and the upper terminal <NUM>, a conductor (not shown) of a cable <NUM> of which a jacket is removed is located, and the conductor of the cable is fixed and is electrically connected by the compressive force of the upper terminal <NUM>, that is, by the clamping force of the coupling bolt <NUM>, the upper terminal <NUM> being moved in the direction of the lower terminal <NUM> by the coupling bolt <NUM>.

That is, fundamentally, among methods of electrically connecting the cable <NUM> by fixing the same, the present disclosure relates to a method of fixing the conductor of the cable <NUM> by compressive force with which the upper terminal <NUM> is compressed in the direction of the lower terminal <NUM> by the coupling bolt <NUM>. Herein, it is obvious that the clamping force of the coupling bolt <NUM> causes compressive force between a terminal and another terminal, specifically, between the upper terminal <NUM> and the lower terminal <NUM>.

In addition, the base frame <NUM> of the electronic device mentioned in the present disclosure is provided inside the electronic device and has a space in which the cable is connected. At the base frame <NUM>, an installation hole <NUM> into which the coupling bolt <NUM>, which will be described later, is coupled by screw-type engagement is formed.

In addition, in the present disclosure, in general, a crimp terminal (not shown) is coupled to the conductor of the cable <NUM> of which the jacket is stripped to be fixed and coupled to a pair of terminals, but the crimp terminal may not be coupled for quick operation, so it is obvious that the diameter or thickness of the conductor of the cable <NUM>, which will be described later, may correspond to the thickness of the crimp terminal.

The lower terminal <NUM>, which is a main element for achieving the present disclosure, is
provided with a first coupling hole <NUM> that is formed through the lower terminal <NUM> on a first side thereof. The first coupling hole <NUM> corresponds to the installation hole <NUM> formed in the base frame <NUM> of the electronic device. The lower terminal <NUM> is made of a conductor to be electrically connected to the conductor of the cable <NUM>. A thread is formed at the inner circumferential surface of the first coupling hole <NUM> such that the lower terminal <NUM> is fixed to the base frame <NUM> by the coupling bolt <NUM>, which will be described later, being in contact with the base frame <NUM>.

In addition, the lower terminal <NUM> of the present disclosure is formed extending in length to a second side thereof so that the pressure sensor <NUM>, which will be described later, is provided on the lower terminal <NUM> on the second side thereof. A coupling hole (not shown) may be formed in the upper surface on the second side so that the lower part of the pressure sensor <NUM> is mounted therein and coupled thereto, or is coupled thereto by screw-type engagement.

The pressure sensor <NUM>, which is a main element for achieving the present disclosure, has
the lower part mounted on the lower terminal <NUM> on the second side thereof, or the lower part coupled and fixed thereto as described above. When the pressure bolt <NUM>, which will be described later, is coupled into the fastening hole <NUM> of the upper terminal <NUM> by screw-type engagement and is tightened, the upper surface of the pressure sensor <NUM> is pressed being in contact with the lower surface of the pressure bolt <NUM>, and the pressure generated by the clamping force of the pressure bolt <NUM> is measured.

In addition, the pressure sensor <NUM> of the present disclosure transmits measured pressure information to the controller <NUM>, which will be described later, and the controller <NUM> transmits the pressure information to the display <NUM>, which will be described later, or a user terminal (not shown) so that a user is capable of easily determining the measured pressure.

That is, in the system for measuring terminal connection or disconnection and pressure by using the pressure sensor according to the present disclosure, the pressure information measured by the pressure sensor <NUM> is easily determined, so a user is capable of easily determining connection or disconnection between the cable <NUM> and the terminals. When it is determined that the connection is weakened, specifically, when it is determined that the pressure information is lower than preset pressure information, it is easy to perform maintenance, thereby preventing a fire caused by Joule heating.

Specifically, the pressure sensor <NUM> of the present disclosure may include: a lower insulation <NUM> of which the lower part is coupled to the upper part of the lower terminal <NUM> on the second side thereof; a sensor <NUM> positioned on the lower insulation <NUM>; and an upper insulation <NUM> coupled above the lower insulation <NUM> such that the lower surface of the upper insulation <NUM> is in contact with the sensor <NUM>.

That is, regarding the pressure sensor <NUM> of the present disclosure, as the upper insulation <NUM> is pressed by the clamping force of the pressure bolt <NUM>, which will be described later, and the sensor <NUM> is thus pressed, the sensor <NUM> measures the pressure. The lower insulation <NUM> insulates and supports the sensor <NUM>, so that the pressure is more stably measured. Accordingly, it is easily determined connection or disconnection between the cable <NUM> and the terminals, specifically, whether the clamping force of the coupling bolt <NUM>, which will be described later, is stably formed.

Herein, regarding the detail in which the upper insulation <NUM> is coupled to the lower insulation <NUM>, it is obvious that the upper insulation <NUM> is coupled to the lower insulation <NUM> such that the upper insulation <NUM> is pressed by the pressure bolt <NUM>, which will be described, and is movable downwards.

Describing the coupling configuration of the lower insulation <NUM> and the upper insulation <NUM> in more detail, the lower insulation <NUM> includes a lower mounting recess <NUM> in the upper surface thereof, into which the lower part of the sensor <NUM> is inserted. The lower part of the sensor <NUM> is inserted into the lower mounting recess <NUM> and the upper part protrudes. In the meantime, the upper insulation <NUM> includes an upper mounting recess <NUM> in the lower surface thereof, into which the upper part of the sensor <NUM> is inserted. The upper part of the sensor <NUM> inserted into the upper mounting recess <NUM> is pressed by the upper insulation <NUM> pressed by the pressure bolt <NUM>, which will be described later, and the pressure is measured.

Describing another embodiment of the coupling configuration of the lower insulation <NUM> and the upper insulation <NUM>, the lower insulation <NUM> includes a lower mounting recess <NUM> in the upper surface thereof, into which the sensor <NUM> is completely inserted. The lower part of the upper insulation <NUM> is inserted into the lower mounting recess <NUM> and is coupled. Accordingly, as the upper insulation <NUM> is pressed by the pressure bolt <NUM>, which will be described later, the sensor <NUM> provided inside the lower mounting recess <NUM> of the lower insulation <NUM> is pressed and the pressure is measured.

Herein, regarding the pressure sensor <NUM> of the present disclosure, it is obvious that the upper insulation <NUM> is coupled to the lower insulation <NUM> so as to be lifted up and down. In order to stably lift the upper insulation <NUM> up and down, a rail groove or a rail may be formed in the lower insulation <NUM>. When the rail groove or the rail is formed in the lower insulation <NUM>, a rail or a rail groove corresponding thereto may be formed in the upper insulation <NUM>.

In connection with the above, since the upper surface of the upper insulation <NUM> may be damaged by the pressure bolt <NUM> that is rotated being in contact with the lower surface of the pressure bolt <NUM>, which will be described later, a contact plate (not shown) made of an insulation material having high durability may be further coupled to the upper insulation <NUM> or the upper insulation <NUM> may include the contact plate.

The upper terminal <NUM>, which is a main element for achieving the present disclosure, is
provided with a second coupling hole <NUM> that is formed through the upper terminal <NUM> on a first side thereof and corresponds to the first coupling hole <NUM> of the lower terminal <NUM>, and is also provided with a fastening hole <NUM> that is formed through the upper terminal <NUM> on a second side thereof, at a position corresponding to the pressure sensor. When the coupling bolt <NUM>, which will be described later, is coupled to the base frame <NUM> and the first coupling hole <NUM> described above by screw-type engagement, passing through the second coupling hole <NUM>, the head of the coupling bolt <NUM> presses the outside of the second coupling hole <NUM>, so that the upper terminal <NUM> is moved downwards, and accordingly, connection force occurs at the conductor of the cable <NUM> positioned between the lower terminal <NUM> and the upper terminal <NUM>.

In addition, after the connection force is generated at the conductor of the cable <NUM> by the upper terminal <NUM> and the lower terminal <NUM> due to the coupling bolt <NUM>, the pressure bolt <NUM>, which will be described later, is coupled into the fastening hole <NUM> by screw-type engagement, and the clamping force causes pressure to the pressure sensor <NUM> described above and the pressure is measured.

That is, as the upper terminal <NUM> of the present disclosure is moved in the direction of the lower terminal <NUM> by the coupling bolt <NUM>, which will be described later, in another method, the conductor of the cable <NUM> positioned between the lower terminal <NUM> and the upper terminal <NUM> is pressed and the cable <NUM> is connected. Regarding the pressure measured by the pressure sensor <NUM>, while the lower surface of the upper terminal <NUM> is in contact with the conductor of the cable <NUM> by tightening the coupling bolt <NUM>, that is, while the conductor of the cable <NUM> is fixed with the pressure of <NUM>, the pressure bolt <NUM> is tightened and the lower surface of the pressure bolt <NUM> is in contact with the upper surface of the pressure sensor <NUM>. When the pressure bolt <NUM> is tightened with the pressure of <NUM>, the coupling bolt <NUM> is tightened again so that the conductor of the cable <NUM> is firmly fixed. When the pressure sensor <NUM> measures the pressure caused by the pressure bolt <NUM>, the controller <NUM>, which will be described later, stores initial pressure information.

Furthermore, regarding pressure measurement using the pressure sensor <NUM> in another method, while the connection force caused by the clamping force formed by the coupling bolt <NUM> is stably formed, the pressure bolt <NUM>, which will be described later, is coupled into the fastening hole <NUM> by screw-type engagement, the pressure sensor <NUM> is pressed by the clamping force, and the pressure sensor <NUM> measures the pressure. The pressure bolt <NUM> is sufficiently tightened to form clamping force such that the clamping force is similar to the clamping force formed by the coupling bolt <NUM> or a pressure preset in the controller <NUM>, which will be described, is reached, and pressure information corresponding to an initial connection force is measured by the pressure sensor <NUM>.

Herein, it is obvious that a thread is not formed at the inner circumferential surface of the second coupling hole <NUM>, so that the coupling bolt <NUM> passes through and the head of the coupling bolt <NUM> presses the upper terminal <NUM> downwards. A thread is formed at the inner circumferential surface of the fastening hole <NUM> such that the pressure bolt <NUM> is coupled by screw-type engagement.

Specifically, the upper terminal <NUM> of the present disclosure may include: a body <NUM> in which the second coupling hole <NUM> corresponding to the first coupling hole <NUM> is formed through the body <NUM>; a bent part <NUM> formed extending on a side of the body <NUM> (the second side of the upper terminal) and formed in a shape that is bent upwards in the direction of the second side of the upper terminal; and a separation part <NUM> formed extending on a side of the bent part <NUM> (the second side of the upper terminal) in the direction of the second side of the upper terminal, and provided with the fastening hole <NUM> formed through the separation part <NUM>, at a position corresponding to the pressure sensor <NUM>.

That is, regarding the upper terminal <NUM> of the present disclosure, the body <NUM> in which the second coupling hole <NUM> is formed is pressed downwards by the coupling bolt <NUM>, which will be described later, to connect the conductor of the cable <NUM> positioned between the lower terminal <NUM> and the upper terminal <NUM>. The bent part <NUM> allows the separation part <NUM> to be sufficiently spaced apart from the upper surface of the lower terminal <NUM> on the second side, so that the pressure caused by the clamping force of the pressure bolt <NUM>, which will be described later, is generated smoothly.

Herein, it is preferable that the bent part <NUM> is formed in a shape that is bent upwards in the direction of the second side, namely, a curved shape or an arc shape. This is to ensure that the whole of the separation part <NUM> is pressed downwards and the pressure caused by the clamping force of the pressure bolt <NUM> is generated smoothly. Because when the second side of the upper terminal <NUM>, specifically, the separation part <NUM>, is pressed downwards by the pressure bolt <NUM>, which will be described later, the second side of the upper terminal <NUM>, specifically, only the second side of the separation part <NUM>, is pressed downwards by the clamping force caused by the screw-type engagement of the pressure bolt <NUM>.

Furthermore, the upper terminal <NUM> may further include a first reinforcing bead <NUM> that is formed at the upper surface between the body <NUM> and the bent part <NUM> in order to prevent the bent part <NUM> from breaking from the body <NUM> when clamping force is generated by the pressure bolt <NUM> as described above.

As the pressure bolt <NUM> is coupled by screw-type engagement, when the lower part of the pressure bolt <NUM> comes into contact with the upper part of the pressure sensor <NUM>, specifically, the upper surface of the upper insulation <NUM>, the pressure caused by the clamping force is generated. Continuous occurrence of the clamping force may cause a phenomenon that the pressure bolt <NUM> is not allowed to be moved downwards, the separation part <NUM> is moved upwards and thus, the bent part <NUM> bends upwards and may break. The first reinforcing bead <NUM> minimizes the phenomenon so that the pressure caused by the clamping force of the pressure bolt <NUM> is more stably formed.

In addition, the upper terminal <NUM> of the present disclosure may include a plurality of second reinforcing beads <NUM> formed starting from the lower surface of the bent part <NUM> to the lower surface of the separation part <NUM>. The second reinforcing bead <NUM> enables the bent part <NUM> and the separation part <NUM> to bend together when clamping force is generated by the pressure bolt <NUM>. Thus, the separation part <NUM> is prevented from easily breaking from the bent part <NUM>, and simultaneously, the pressure caused by the pressure bolt <NUM> is stably generated.

The coupling bolt <NUM>, which is a main element for achieving the present disclosure, is
coupled into the installation hole <NUM> of the base frame <NUM> by screw-type engagement, passing through the second coupling hole <NUM> of the upper terminal <NUM> and the first coupling hole <NUM> of the lower terminal <NUM>. By the clamping force caused by the screw-type engagement, the upper terminal <NUM> is pressed downwards, so that the conductor of the cable <NUM> positioned between the lower terminal <NUM> and the upper terminal <NUM> is connected and fixed.

Herein, although it has been described that a thread may be formed at the inner circumferential surface of the first coupling hole <NUM>, since the lower terminal <NUM> is also pressed together downwards by the conductor of the cable <NUM> positioned between the lower terminal <NUM> and the upper terminal <NUM>, it is obvious that a thread does not need to be formed at the inner circumferential surface. In the case in which a thread is formed at the inner circumferential surface, it is preferable that a thread is formed at the inner circumferential surface so that the lower terminal <NUM> is prevented from moving freely.

That is, as described above, the coupling bolt <NUM> of the present disclosure is coupled into the installation hole <NUM> of the base frame <NUM> by screw-type engagement and thus presses the upper terminal <NUM> downwards, so that the conductor of the cable <NUM> positioned between the lower terminal <NUM> and the upper terminal <NUM> is pressed by the upper terminal <NUM> and fixed, thus causing connection force.

Herein, it is obvious that the coupling bolt <NUM> of the present disclosure has different lengths in which screw-type engagement is made according to the diameter or thickness of the conductor of the cable <NUM>. The pressure bolt <NUM>, which will be described later, also has different lengths in which screw-type engagement is made according to the diameter or thickness of the conductor of the cable <NUM>.

The pressure bolt <NUM>, which is a main element for achieving the present disclosure, is
coupled into the fastening hole <NUM> of the upper terminal <NUM> by screw-type engagement to apply pressure to the pressure sensor <NUM>. As the coupling bolt <NUM> presses and fixes the conductor of the cable <NUM> to connect the same, the pressure sensor <NUM> is pressed, and the pressure sensor <NUM> measures the applied pressure of the pressure bolt <NUM> and provides pressure information to the controller <NUM>, which will be described later.

Herein, as described above, the pressure bolt <NUM> of the present disclosure may apply pressure to the pressure sensor <NUM> in another method. The coupling bolt <NUM> presses and fixes the conductor of the cable <NUM> to connect the same, and is coupled by screw-type engagement, and the pressure sensor <NUM> is thus pressed by the clamping force. The pressure sensor <NUM> measures the applied pressure caused by the clamping force of the pressure bolt <NUM> and transmits pressure information to the controller <NUM>. The pressure bolt <NUM> is tightened until the measured pressure reaches a preset pressure.

That is, the pressure bolt <NUM> of the present disclosure applies pressure to the pressure sensor <NUM> as much as an operator uses the coupling bolt <NUM> to connect the conductor of the cable <NUM> between the upper terminal <NUM> and the lower terminal <NUM>. Alternatively, after an operator uses the coupling bolt <NUM> to connect the conductor of the cable <NUM> between the upper terminal <NUM> and the lower terminal <NUM>, the pressure bolt <NUM> is coupled into the fastening hole <NUM> of the upper terminal <NUM> and applies pressure to the pressure sensor <NUM> as much as a preset pressure.

Describing additionally, it is preferable that after the conductor of the cable <NUM> is connected between the upper terminal <NUM> and the lower terminal <NUM> by using the coupling bolt <NUM>, the pressure bolt <NUM> of the present disclosure is coupled into the fastening hole <NUM> of the upper terminal <NUM> and the pressure bolt <NUM> applies pressure to the pressure sensor <NUM> as much as a preset pressure. This is the latter case. This is because, when the pressure bolt <NUM> applies pressure, the pressure bolt <NUM> is rotated because of vibration and the pressure may not be applied as much as the preset pressure in the process of additionally tightening the coupling bolt <NUM>.

However, according to the above-described method of tightening the pressure bolt <NUM> after connecting the conductor of the cable <NUM> between the upper terminal <NUM> and the lower terminal <NUM> by using the coupling bolt <NUM>, it is difficult to form the same pressure as the applied pressure depending on the thickness of the conductor of the cable <NUM> caused by the coupling bolt <NUM>. In practice, in order to measure the same pressure as the pressure applied to the conductor of the cable <NUM>, provisional coupling is made to set the pressure between the upper terminal <NUM> and the conductor of the cable <NUM> and the pressure between the pressure bolt <NUM> and the pressure sensor <NUM> to <NUM>, and then the coupling bolt <NUM> is tightened again, and the pressure sensor <NUM> measures the pressure caused by the clamping force of the coupling bolt <NUM>, thereby determining the connection force of the conductor of the cable <NUM> more accurately.

In connection with the above, the system for measuring terminal connection or disconnection and pressure by using the pressure sensor according to the present disclosure may include the controller <NUM> that receives measured pressure information from the pressure sensor <NUM>, specifically, is connected to the sensor <NUM> and receives the measured pressure information from the sensor <NUM>.

Describing additionally, after the pressure between the upper terminal <NUM> and the conductor of the cable <NUM> and the pressure between the pressure bolt <NUM> and the pressure sensor <NUM> are set to <NUM>, the controller <NUM> receives pressure information the same as the pressure of connecting the conductor of the cable <NUM> by tightening the coupling bolt <NUM>, from the pressure sensor <NUM>. Alternatively, after the conductor of the cable <NUM> is connected by tightening the coupling bolt <NUM>, the pressure bolt <NUM> is tightened until the preset pressure is applied, and the controller <NUM> receives pressure information from the pressure sensor <NUM>.

The controller <NUM> transmits the received pressure information to the display <NUM>, which will be described later, or stores the preset pressure information therein. When the measured pressure, namely, the pressure information, is out of an error range of the initial pressure information or out of an error range of the preset pressure information, the controller <NUM> transmits warning information to the display <NUM> or a user terminal so that the user or operator is capable of easily determining terminal connection or disconnection.

Herein, it is obvious that the controller <NUM> includes a wireless communication part for transmitting the pressure information or warning information to a user terminal (e.g., a portable device).

That is, the system for measuring terminal connection or disconnection and pressure by using the pressure sensor according to the present disclosure may further include a user terminal, such as a portable device, etc., for receiving the pressure information or warning information from the controller <NUM> and displaying the same to the user or operator.

In addition, the system for measuring terminal connection or disconnection and pressure by using the pressure sensor according to the present disclosure may include the display <NUM> for receiving pressure information from the controller <NUM> and displaying the pressure information.

The display <NUM> may receive the measured pressure information and preset stored pressure information from the controller <NUM> and may display the information selectively. When the measured pressure information is out of an error range of initially measured pressure information or preset pressure information, different lighting or color is displayed, whereby the user or operator is capable of easily determining terminal connection or disconnection.

Herein, the controller <NUM> may be provided inside the electronic device, and the display <NUM> may be provided at the outside of the electronic device or provided separately. In the case in which the display <NUM> is separately provided, when necessary, the user or operator connects the display to the controller <NUM> and determines terminal connection or disconnection, that is, measured pressure information.

In the meantime, the system for measuring terminal connection or disconnection and pressure by using the pressure sensor according to the present disclosure may further include a position detection sensor (not shown) that is provided at the upper surface of the upper terminal <NUM>, measures the rotation amount of the coupling bolt <NUM>, and transmits measured rotation amount information to the controller <NUM>.

The position detection sensor is provided on the first side or the second side at the upper surface of the upper terminal <NUM>, is connected to the controller <NUM>, and generates rotation amount information of the coupling bolt <NUM>. Accordingly, the controller <NUM> calculates the pressure generated by one rotation of the coupling bolt <NUM> and transmits applied pressure information to the display <NUM> or the user terminal. After determining the applied pressure information, the operator or user easily rotates the coupling bolt <NUM> as much as needed so as to apply pressure, thereby facilitating maintenance.

Herein, the upper part or the whole of the upper insulation <NUM> may be made of a transparent material, and it is preferable that the above-described contact plate is made of a transparent material.

Hereinafter, described will be Embodiment <NUM> and Embodiment <NUM> of a method for measuring terminal connection or disconnection and pressure by using the system for measuring terminal connection or disconnection and pressure by using the pressure sensor described above.

Embodiment <NUM> is a method of tightening the pressure bolt <NUM> in advance so that the pressure corresponding to the clamping force caused by the coupling bolt <NUM> is generated.

First, in a first step, the lower terminal <NUM> is positioned on the base frame <NUM> of the electronic device, the upper terminal <NUM> is provisionally coupled above the lower terminal <NUM> by using the coupling bolt <NUM>, and the pressure bolt <NUM> is provisionally coupled to the upper terminal <NUM>.

In a second step after the first step, the conductor of the cable <NUM> is positioned between the lower terminal <NUM> and the upper terminal <NUM>, and the coupling bolt <NUM> is tightened such that the pressure applied to the conductor of the cable <NUM> by the clamping force of the coupling bolt <NUM> is <NUM>, in other words, the upper terminal <NUM> is in contact with the conductor of the cable <NUM>. In addition, the pressure bolt <NUM> is tightened to cause the lower part of the pressure bolt <NUM> to be in contact with the upper part of the pressure sensor <NUM> such that the pressure applied to the pressure sensor <NUM> is <NUM>.

That is, the second step corresponds to a pressure measurement preparation step of setting the pressure between the upper terminal <NUM> and the conductor of the cable <NUM> and the pressure between the pressure bolt <NUM> and the pressure sensor <NUM> to <NUM>.

In a third step after the second step, the coupling bolt <NUM> is tightened to fix the conductor of the cable <NUM> between the lower terminal <NUM> and the upper terminal <NUM> and connect the conductor of the cable <NUM>, wherein the coupling bolt <NUM> is tightened such that the pressure caused by the pressure bolt <NUM> measured by the pressure sensor <NUM> reaches a preset pressure.

That is, in the third step, the pressure corresponding to the clamping force caused by the coupling bolt <NUM> is applied to the pressure sensor <NUM> by the pressure bolt <NUM>, and the pressure of connecting the conductor of the cable <NUM> may be measured.

In a fourth step after the third step, terminal connection or disconnection, that is, measured pressure information from the controller <NUM>, is continuously monitored through the display <NUM> or the user terminal, and the coupling bolt <NUM> is tightened again when maintenance is required.

Embodiment <NUM> is a method of generating a similar pressure corresponding to the clamping force caused by the coupling bolt <NUM>, specifically, enabling the pressure sensor <NUM> to be pressed by the pressure bolt <NUM> with a preset pressure according to the diameter or thickness of the conductor of the cable <NUM>.

First, in a first step, the lower terminal <NUM> is positioned on the base frame <NUM> of the electronic device to prepare for later coupling by the coupling bolt <NUM>.

In a second step after the first step, the upper terminal <NUM> is positioned above the lower terminal <NUM>, and the coupling bolt <NUM> is first tightened and coupled into the installation hole <NUM> of the base frame <NUM> by screw-type engagement passing through the first coupling hole <NUM> of the lower terminal <NUM> and the second coupling hole <NUM> of the upper terminal <NUM>, so that the lower terminal <NUM> and the upper terminal <NUM> are provisionally coupled.

Herein, in the second step, the upper terminal <NUM> is movable upwards and downwards by the coupling bolt <NUM>.

In a third step after the second step, the upper terminal <NUM> is spaced apart from the lower terminal <NUM> and then the conductor of the cable <NUM> is positioned on one side between the lower terminal <NUM> and the upper terminal <NUM>, and the coupling bolt <NUM> is second tightened to fix the conductor of the cable <NUM> between the lower terminal <NUM> and the upper terminal <NUM>. Herein, the coupling bolt <NUM> is tightened and connected so that the conductor of the cable <NUM> is firmly fixed by the upper terminal <NUM> and the lower terminal <NUM>.

In a fourth step, the pressure bolt <NUM> is tightened and coupled into the fastening hole <NUM> of the upper terminal <NUM> by screw-type engagement, wherein the pressure bolt <NUM> is tightened and coupled by screw-type engagement while the display <NUM> is checked until the preset pressure stored in the controller <NUM> is applied to the pressure sensor <NUM>. While the cable <NUM> is connected by the clamping force of the coupling bolt <NUM>, the pressure bolt <NUM> is tightened until the preset pressure is applied, and the connection state of the cable <NUM> is determined.

In a fifth step after the fourth step, terminal connection or disconnection, that is, measured pressure information from the controller <NUM>, is continuously monitored through the display <NUM> or the user terminal, and the coupling bolt <NUM> is tightened again when maintenance is required.

Claim 1:
A system for measuring terminal connection or disconnection and pressure by using a pressure sensor, the system comprising:
a lower terminal (<NUM>) through which a first coupling hole (<NUM>) is formed on a first side thereof, the first coupling hole (<NUM>) corresponding to an installation hole (<NUM>) formed in a base frame (<NUM>) of an electronic device;
the pressure sensor (<NUM>) of which a lower part is coupled to an upper part of the lower terminal (<NUM>) on a second side thereof;
an upper terminal (<NUM>) through which a second coupling hole (<NUM>) is formed on a first side thereof, the second coupling hole (<NUM>) corresponding to the first coupling hole (<NUM>);
a coupling bolt (<NUM>) coupled into the installation hole (<NUM>) of the base frame (<NUM>) by screw-type engagement, passing through the second coupling hole (<NUM>) of the upper terminal (<NUM>) and the first coupling hole (<NUM>) of the lower terminal (<NUM>);
characterised in that,
the upper terminal (<NUM>) has a fastening hole (<NUM>) formed on a second side thereof, the fastening hole (<NUM>) being at a position corresponding to the pressure sensor (<NUM>); and
a pressure bolt (<NUM>) coupled into the fastening hole (<NUM>) of the upper terminal (<NUM>) by screw-type engagement, and configured to apply pressure to the pressure sensor (<NUM>).