Fixture for measuring cable transmission characteristics with easy attachment and detachment

Abstract

The present invention relates to a fixing device for measuring transmission characteristics that allows for easy cable attachment and detachment. More specifically, it relates to a fixing device for measuring transmission characteristics that allows for the precise and reproducible measurement of the cable's transmission characteristics while preventing contact failures caused by external vibrations, by stably guiding and fixing the cable, which is the object to be measured, in a fixed position on a printed circuit board, while maintaining contact reliability even during repeated attachment and detachment of the cable, and simplifying the measurement process by configuring the transmission socket electrically connected to an external measuring device into a single port.

Description

Technology Field

[0001] The present invention The present invention relates to a fixing device for measuring transmission characteristics that allows for easy cable attachment and detachment, and more specifically, to a fixing device for measuring transmission characteristics that allows for the precise and reproducible measurement of the cable's transmission characteristics while preventing contact failures caused by external vibrations by stably guiding and fixing the cable, which is the object to be measured, in a fixed position on a printed circuit board, while maintaining contact reliability even during repeated attachment and detachment of the cable, and simplifying the measurement process by configuring the transmission socket electrically connected to an external measuring device into a single port. Background Technology

[0002] In general, cables, including coaxial cables, are widely used for transmitting high-frequency signals, RF signals, or precision measurement signals, and a stable electrical connection with measuring equipment is essential to measure the electrical characteristics (impedance, insertion loss, reflection loss, etc.) of such cables.

[0003] Conventionally, methods of directly connecting the ends of cables to connectors or connecting them to measuring equipment using temporary fixing jigs were mainly used.

[0004] As prior art for improving such connection environments, Korean Registered Patent Publication No. 10-2023647 (September 20, 2019) discloses a 'jig for measuring cable transmission characteristics'.

[0005] Although the above conventional technology is effective in stably maintaining the balance of cable conductors and preventing measurement errors, it is based on a 2-port configuration that manages input and output signals individually, so there has been a demand for technical improvements to further simplify the measurement process in production and inspection sites where a large number of samples must be measured quickly.

[0006] Furthermore, in the process of securing the cable conductor, which is the object to be measured, after seating it on the extension support base, there is a need for a more advanced fixing mechanism that inherits the stability of existing bolt fastening or crimping methods while immediately ensuring consistent contact reliability regardless of the operator's skill level during repeated attachment and detachment. Prior art literature

[0007] Korean Patent Publication No. 10-2023647 (September 20, 2019) 'Jig for measuring cable transmission characteristics' The problem to be solved

[0008] The present invention was devised to solve the aforementioned problems, and the objective of the present invention is to provide a fixing device for measuring cable transmission characteristics that allows the cable to be stably guided and fixed in a fixed position on a printed circuit board to prevent contact failures caused by external vibrations, etc., while enabling precise and reproducible measurement of the cable's transmission characteristics, while maintaining contact reliability even during repeated attachment and detachment processes of the cable, and simplifying the measurement process by configuring the transmission socket electrically connected to external measuring equipment into a single port.

[0009] The problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0010] To achieve the above-mentioned objective, the present invention relates to a fixing device for measuring electrical transmission characteristics of a cable in which the sheathing of the end portion is removed so that the cable conductor is exposed to the outside, comprising: a printed circuit board having a circuit pattern formed thereon for signal transmission; a one-port type transmission socket provided at the rear end of the printed circuit board and electrically connected to an external measuring device; a conductor support plate disposed on the upper surface of the front end of the printed circuit board to guide the cable conductor to be electrically connected to the circuit pattern of the printed circuit board; a fixing part to which the printed circuit board is fixed; a supporting part supporting the fixing part; and a fastening means for fixing the supporting part to the fixing part, wherein the conductor support plate has a fastening hole formed therein that penetrates the upper and lower surfaces of the front end and allows the cable conductor to be inserted to be electrically connected to the circuit pattern of the printed circuit board, and the fixing part comprises a base plate on which the printed circuit board is seated on the upper surface. The present invention provides a fixing device for measuring transmission characteristics that facilitates easy cable attachment and detachment, comprising a fixing member for fixing the printed circuit board to the upper surface of the base plate, wherein the base plate comprises a rear plate on which the printed circuit board is seated and fixed on the upper surface, and a front plate on which the cable is seated on the upper surface, wherein the rear end portion is integrally formed with the front end portion of the rear plate, and the cable is seated on the upper surface, and further comprises a guide means for guiding the seating position of the cable on the front plate so that the cable conductor is inserted into the fastening hole and coupled, wherein the guide means comprises a guide plate formed on the upper surface of the rear plate, wherein a lower gripping groove on which the lower portion of the cable is seated in the longitudinal direction is formed extending from the front end portion to the rear end portion. Effects of the invention

[0011] According to the present invention, by stably guiding and fixing the cable to be measured in a fixed position on a printed circuit board, it is possible to prevent contact failures caused by external vibrations and the like, thereby enabling precise and reproducible measurement of the transmission characteristics of the cable.

[0012] In addition, it has the effect of maintaining contact reliability even during repeated attachment and detachment of the cable.

[0013] In particular, by configuring the transmission socket that is electrically connected to external measuring equipment as a single port, the measurement process can be simplified.

[0014] The effects of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. Brief explanation of the drawing

[0015] FIG. 1 is a perspective view illustrating a fixing device for measuring transmission characteristics that allows for easy cable attachment and detachment according to the present invention. FIG. 2 is a front view illustrating a fixing device for measuring transmission characteristics that allows for easy cable attachment and detachment according to the present invention. FIG. 3 is a plan view illustrating a fixing device for measuring transmission characteristics that allows for easy cable attachment and detachment according to the present invention. FIG. 4 is a perspective view illustrating the state in which a cable is coupled to measure the transmission characteristics of a cable in a fixing device for measuring transmission characteristics that allows for easy cable attachment and detachment according to the present invention. FIG. 5 is a partially exploded perspective view illustrating another example of a support member in a fixing device for measuring transmission characteristics that allows for easy cable attachment and detachment according to the present invention. FIG. 6 is a partially exploded perspective view illustrating the combined state of a locking plate and a front plate in a fixing device for measuring transmission characteristics that allows for easy cable attachment and detachment according to the present invention. and FIG. 7 is a usage diagram illustrating the operating state of a rotation adjustment means in a fixed device for measuring transmission characteristics that allows for easy cable attachment and detachment according to the present invention. Specific details for implementing the invention

[0016] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings.

[0017] Referring to FIGS. 1 to 7, the cable attachment / detachment attachment / detachment attachment / fixing device (hereinafter referred to as the "fixing device") (100) according to the present invention is a device for measuring the electrical transmission characteristics of a cable conductor (20) located at the center of a cable (10), comprising: a printed circuit board (110) having a circuit pattern for signal transmission formed thereon; a one-port type transmission socket (120) provided at the rear end of the printed circuit board (110) and electrically connected to an external measuring device; and the front end of the printed circuit board (110). It may include a conductor support plate (130) disposed on the upper surface and guiding the cable conductor (20) to be electrically connected to the circuit pattern of the printed circuit board (110), and a fixing part (140) to which the printed circuit board (110) is fixed.

[0018] The above cable (10) is an object to be verified for electrical performance through the above fixing device (100), and may be a data transmission cable typically wrapped with an insulator and a sheath.

[0019] For example, the above cable (10) may be any one of a coaxial cable for high-frequency signal transmission, a twisted pair cable for communication, or a hybrid cable that combines power transmission and data transmission, but is not limited thereto and may include any form of wire capable of transmitting electrical signals.

[0020] The above cable conductor (20) may represent a medium that transmits an actual electrical signal by being located at the center of the cable (10).

[0021] When measuring cable transmission characteristics, the cable (10) may be provided with the cable conductor (20) exposed to the outside as the sheath at the end is removed for a certain length.

[0022] The above cable conductor (20) is preferably made of a metal material with high conductivity such as copper (Cu), silver (Ag), aluminum (Al), or an alloy thereof, and may have a single wire or a stranded wire structure in which multiple wires are twisted.

[0023] The printed circuit board (110) may have a predetermined circuit pattern formed thereon so that an electrical signal transmitted through the cable conductor (20) can be stably transmitted to an external measuring device.

[0024] It is preferable that the circuit pattern of the above printed circuit board (110) be designed to match the characteristic impedance of the cable (10) being measured in order to minimize signal return loss.

[0025] For example, the printed circuit board (110) may be designed to be suitable for measuring the transmission characteristics of a high-frequency signal, an RF signal, or a precision measurement signal.

[0026] To this end, the circuit pattern of the printed circuit board (110) may have a transmission line structure that can minimize signal transmission loss and may be electrically and firmly connected to the transmission socket (120).

[0027] The above printed circuit board (110) can be configured to be modified into various shapes depending on the specifications of the cable to be measured or the purpose of measurement.

[0028] That is, the printed circuit board (110) can be provided in a form in which the shape, material, thickness, or layer structure of the circuit pattern is optimized to correspond to the type of cable (10) to be measured or the mounting specifications of the transmission socket (120).

[0029] The transmission socket (120) may be configured to be positioned at the rear end of the printed circuit board (110) and electrically connected to external measurement equipment such as an external network analyzer or signal analyzer.

[0030] Specifically, the transmission socket (120) may be made of a coaxial connector standard suitable for high-frequency signal transmission, such as an SMA type or N-Type.

[0031] The transmission socket (120) can be connected to the circuit pattern of the printed circuit board (110) by soldering or crimping, thereby minimizing discontinuities that may occur in the signal transmission section.

[0032] The fixed device (100) according to the present invention may be configured in a 1-port manner that can measure the input and reflection of a signal through one port.

[0033] Accordingly, the above-mentioned fixture (100) can not only simplify the measurement circuit configuration unlike the conventional 2-port method, but also provide the advantage of improving the efficiency of the measurement process and simplifying the calibration procedure by occupying only one port of the external measurement equipment.

[0034] The external measuring equipment may consist of a network analyzer or a signal analyzer, and by analyzing the signal that is reflected back after the electrical signal input through the transmission socket (120) is transmitted to the cable conductor (20), the transmission characteristics such as the return loss, impedance change amount, and attenuation characteristics of the cable (10) can be calculated.

[0035] The conductor support plate (130) may be configured to be placed on the upper surface of the front end of the printed circuit board (110) so that the cable conductor (20) is seated at a predetermined position.

[0036] In other words, the conductor support plate (130) may have a structure that is positioned on the upper surface of the front end of the printed circuit board (110) to guide the cable conductor (20) to correspond exactly to the contact point of the circuit pattern of the printed circuit board (110).

[0037] Accordingly, the fixing device (100) can minimize misalignment or poor contact of the cable conductor (20) even during the repeated attachment and detachment process of the cable (10).

[0038] A fastening hole (131) may be formed in the conductor support plate (130) to allow the cable conductor (20) to be inserted and electrically connected to the circuit pattern of the printed circuit board (110).

[0039] The above fastening hole (131) penetrates the upper and lower surfaces of the conductor support plate (130), and can be formed at the front end of the conductor support plate (130).

[0040] The above fastening hole (131) can be formed in a shape corresponding to the diameter or shape of the cable conductor (20).

[0041] The above fastening hole (131) guides the cable conductor (20) to automatically align with the circuit pattern of the printed circuit board (110) when the cable (10) is seated on the fixing part (140), thereby eliminating positional deviations that may occur during each measurement and improving the reproducibility of the measurement data.

[0042] The cable conductor (20) can be guided through the fastening hole (131) formed in the conductor support plate (130) and come into direct contact with the circuit pattern of the printed circuit board (110).

[0043] The above fixing part (140) is configured to stably fix the printed circuit board (110) in a predetermined position, thereby preventing the position of the printed circuit board (110) from changing due to external shock or vibration during the measurement of the transmission characteristics of the cable (10) that is seated on the upper surface.

[0044] Accordingly, the reliability of the transmission characteristic measurement can be further improved as the change in the signal contact state is suppressed during the measurement of the transmission characteristic of the cable (10) by the fixing device (100).

[0045] To this end, the fixing part (140) may include a base plate (141) having an upper surface on which the printed circuit board (110) is seated, as shown in FIGS. 4 and 5, and a fixing member (142) that integrally fixes the printed circuit board (110) and the conductor support plate (130) to the base plate (141).

[0046] The base plate (141) has a flat upper surface and can serve to support the printed circuit board (110) so that it is seated in an accurate position.

[0047] The above base plate (141) may be made of a material to ensure structural rigidity of the above fixing device (100).

[0048] For example, the base plate (141) may be made of a material such as metal.

[0049] The above base plate (141) can be seated on the installation target surface so that the above fixing device (100) is supported from the installation target surface.

[0050] The surface to be installed may be a workbench, a measuring table, or the inner floor surface of a separate housing.

[0051] The above fixing member (142) may be formed in the shape of a screw, having a head portion having a predetermined diameter formed on the upper part and screw threads formed on the lower outer surface, as shown in FIGS. 4 and 5.

[0052] The above fixing member (142) can fix the conductor support plate (130) to the printed circuit board (110) and simultaneously fix the printed circuit board (110) to the base plate (141) by having its lower part sequentially pass through the conductor support plate (130) and the printed circuit board (110) and being inserted into the upper surface of the base plate (141).

[0053] To this end, a fixing hole (not shown) may be formed in each of the conductor support plate (130) and the printed circuit board (110) to allow the lower part of the fixing member (142) to pass through.

[0054] A fixing groove (not shown) may be formed in the base plate (141) to allow the lower part of the fixing member (142) to be inserted and fixed.

[0055] The above fixing groove can be screw-coupled to the above fixing member (142) by forming screw threads on its inner surface.

[0056] The above fixing member (142) can form a vertical stacked fastening structure in which the conductor support plate (130), the printed circuit board (110), and the base plate (141) are integrated in the vertical direction by having its lower part pass through the fixing holes formed in the conductor support plate (130) and the printed circuit board (110) in sequence, and then being inserted into and tightened in the fixing groove formed in the base plate (141).

[0057] According to this vertical stacked fastening structure, as the fixing member (142) is tightened, the head portion of the fixing member (142) presses the conductor support plate (130) downward, and this pressing force can be transmitted to the base plate (141) via the printed circuit board (110).

[0058] As a result, the conductor support plate (130) can be firmly fixed to the printed circuit board (110) using only the fixing device (142), and the printed circuit board (110) can be stably fixed to the correct position of the base plate (141).

[0059] The integrated fixing method using the above fixing device (142) can prevent the printed circuit board (110) from being pushed or lifted even when repeated fastening force or load is applied to the transmission socket (120) for connection with external measuring equipment.

[0060] Accordingly, the electrical connection between the transmission socket (120) and the printed circuit board (110) can be stably maintained, thereby ensuring the reliability of signal transmission.

[0061] The above fixing device (100) may further include a support member (150) that enables stable seating of the fixing member (140) onto the installation target surface as shown in FIGS. 1 to 5, and a fastening means (160) for fixing the support member (150) to the fixing member (140).

[0062] The above support member (150) is positioned on both lower sides of the base plate (141) and is seated on the installation target surface, thereby allowing the fixing device (100) to be supported more stably on the installation target surface.

[0063] Accordingly, the support member (150) can absorb or disperse external vibrations, micro-shocks, or load changes that may occur during the measurement of the transmission characteristics of the cable (10), thereby improving the positional stability of the printed circuit board (110).

[0064] To this end, the support member (150) may include a pair of balance maintaining bars (151) that are formed with both ends extending in the front-rear direction and are fixed to the lower sides of the base plate (141) by the fastening means (160).

[0065] The above pair of balance bars (151) are spaced further apart than the width of the base plate (141) to maximize the grounding area, thereby preventing the fixing device (100) from tipping in the left-right or front-back directions when a heavy measuring cable is connected to the transmission socket (120) or when external pressure is applied.

[0066] As the balance bar (151) has sufficient length in the front-rear direction, it can perform the function of ensuring that the horizontal level of contact between the conductor support plate (130) and the cable conductor (20) is always maintained at a constant level even if the center of gravity of the fixed part (140) is shifted to one side.

[0067] As shown in FIG. 5, the balance maintaining bar (151) may be provided with a cushioning pad (152) made of an elastic material such as rubber or silicone on the bottom surface that comes into direct contact with the surface to be installed.

[0068] The above cushioning pad (152) may also be provided on the lower surface of the base plate (141).

[0069] The above buffer pad (152) can block mechanical micro-vibrations of the workplace from being transmitted to the printed circuit board (110), thereby performing the function of suppressing noise generation caused by external physical factors when measuring the transmission characteristics of the cable (10).

[0070] The above fastening means (160) may be formed in the form of a bolt having a head portion having a predetermined diameter formed at the other end and a screw thread formed on the outer surface of the first end.

[0071] The above fastening means (160) can fix the balance bar (151) to the lower sides of the base plate (141) by having one end pass through both sides of the balance bar (151) and be inserted into the side of the base plate (141) and fixed.

[0072] To this end, the balance bar (151) may have a binding hole (151a) formed through both sides to allow one end of the fastening means (160) to pass through.

[0073] The above base plate (141) may have a fastening groove (not shown) formed on the lower side of both sides so that one end of the fastening means (160) is inserted and fixed.

[0074] The above fastening groove can be configured so that the fastening means (160) is screw-coupled by forming screw threads on the inner surface.

[0075] The above fastening means (160) can firmly fix the balance bar (151) to each side of the base plate (141) by passing one end of the fastening means (160) through the fastening hole (151a) formed in the balance bar (151) and then being inserted into the fastening groove formed in the base plate (141) and tightened.

[0076] The binding hole (151a) formed in the balance bar (151) can be extended in the longitudinal direction of the balance bar (151) as shown in FIG. 5.

[0077] In other words, the binding hole (151a) can be formed in the shape of an elongated hole having a constant length.

[0078] As shown in FIG. 5, the base plate (141) may have guide grooves (141a) formed on both sides to allow the balance bar (151) to slide forward and backward.

[0079] The guide groove (141a) is formed to extend upward from the lower surface of the base plate (141), and is formed to penetrate the front and rear surfaces of the base plate (141), so that one side can be inserted and moved around the center of the balance bar (151).

[0080] The guide groove (141a) is formed to penetrate the front and rear of the base plate (141) and can perform the function of a rail that restrains the upper and side surfaces of the balance bar (151).

[0081] Accordingly, the balance bar (151) can be prevented from shaking, rotating, or twisting due to external forces.

[0082] Additionally, the balance bar (151) can be moved forward or backward along the guide groove (141a) before the fastening means (160) is fully tightened, thereby allowing the relative position with respect to the base plate (141) to be precisely adjusted.

[0083] The variable coupling structure of the above balance maintaining bar (151) allows the grounding point to be variably selected even in an environment where the surface to be installed is not flat, thereby enabling precise correction of the horizontal state of the above fixing device (100).

[0084] A worker using the above fixing device (100) can optimize the center of gravity of the above fixing device (100) by adjusting the protruding length by sliding the balance maintaining bar (151) in the forward and backward directions according to the measurement environment and the type of cable (10) being measured.

[0085] In particular, when a heavy external measuring cable is connected to the transmission socket (120) and the load is concentrated at the rear, the balance bar (151) can be extended further to the rear and fixed to prevent the fixing device (100) from tipping over backward.

[0086] As a result, the fixing device (100) can flexibly respond to various measurement environments or changes in the specifications of the cable (10) being measured, while maintaining solid contact stability between the cable conductor (20) and the printed circuit board (110) through precise position adjustment of the support member (150), thereby improving the reliability and reproducibility of the measurement data.

[0087] As shown in FIGS. 1, 4 and 6, the base plate (141) may include a rear plate (143) on which the printed circuit board (110) is seated and fixed on the upper surface, and a front plate (144) on which the cable (10) is seated, the rear end of which is integrally formed with the front end of the rear plate (143) and the front end of which is extended forward.

[0088] The above fixing device (100) may further include a guide means (170) for guiding the seating position of the cable (10) on the front plate (144) so ​​that the cable conductor (20) is accurately inserted into and coupled into the fastening hole (131) of the conductor support plate (130) as shown in FIG. 4 or FIG. 6.

[0089] The above guide means (170) may include a guide plate (171) formed on the upper surface of the front plate (144), having a lower gripping groove (172) formed on the upper surface in which the lower outer surface of the cable (10) is seated in the longitudinal direction.

[0090] The lower gripping groove (172) may have a semicircular shape corresponding to the outer diameter of the cable (10) and may be formed to extend from the front end of the guide plate (171) toward the rear end to prevent movement of the cable (10).

[0091] As the cable (10) is seated in the lower gripping groove (172) of the guide plate (171), the cable conductor (20) exposed at one end can be inserted into the fastening hole (131) of the conductor support plate (130) and coupled.

[0092] Through this, the cable conductor (20) can be stably aligned and contacted with the circuit pattern of the printed circuit board (110) through the fastening hole (131) by only the operation of the cable (10) being seated in the lower gripping groove (172) without separate precision operation.

[0093] As a result, the above-mentioned fixture (100) can always ensure consistent measurement reproducibility regardless of the operator's skill level.

[0094] The above fixing device (100) may further include a locking part (180) for fixing the cable (10) seated in the lower gripping groove (172) of the guide plate (171) as shown in FIGS. 1 to 3.

[0095] The above locking part (180) can prevent the cable (10) from moving during the measurement of the transmission characteristics of the cable (10) by pressing and fixing the upper part of the cable (10) seated in the lower gripping groove (172).

[0096] To this end, the locking part (180) may include a locking plate (181) that is seated on the upper surface of the front plate (144) as shown in FIG. 4 or FIG. 6, a hinge means (182) that rotatably fixes one side of the locking plate (181) to one side of the front plate (144), and a pivot handle (183) provided on the locking plate (181).

[0097] The locking plate (181) may have an inlet groove (184) formed on its lower surface to accommodate the locking plate (181), and an upper gripping groove (184a) may be formed on the inner upper surface forming the inlet groove (184) to face the lower gripping groove (172) in the vertical direction.

[0098] The upper gripping groove (184a) can form a cylindrical hollow structure that closely wraps around the outer surface of the cable (10) while being vertically symmetrical with the lower gripping groove (172).

[0099] Accordingly, the upper gripping groove (184a) and the lower gripping groove (172) can prevent the cable (10) located inside from moving outward as the locking plate (181) is seated on the upper surface of the front plate (144).

[0100] The above front plate (144) may have a hinge groove (144a) formed on one side that extends in the other direction.

[0101] The hinge means (182) may include a hinge bar (185) that is formed to protrude downward from one side of the lower part of the locking plate (181) and is rotatably fixed into the interior forming the hinge groove (144a).

[0102] The above hinge bar (185) can be rotatably fixed inside the hinge groove (144a) by a hinge axis (not shown).

[0103] The above hinge shaft can be rotatably fixed to the inner front and rear of the hinge groove (144a) by penetrating the front and rear of the hinge bar (185) with both ends extended in the front-rear direction.

[0104] The hinge bar (185) is formed integrally with the locking plate (181) so that the locking plate (181) can rotate together with the hinge means (182).

[0105] Accordingly, the locking plate (181) can open or close the guide plate (171) by rotating around the hinge means (182).

[0106] The above locking plate (181) can be rotated in a vertical direction so that the other side faces upward, as shown in FIG. 4, so that the guide plate (171) is opened.

[0107] As shown in FIG. 1, the locking plate (181) can be rotated horizontally so that the other side faces in a direction opposite to the hinge means (182), thereby blocking the guide plate (171).

[0108] The hinge groove (144a) is formed in a 'U' shape with one side open, and can prevent lateral shaking that may occur when the hinge bar (185) rotates.

[0109] The above front plate (144) may have a lower guide groove (144b) formed on its upper surface, extending from the front portion in the direction of the guide plate (171).

[0110] The lower guide groove (144b) may form a semicircular shape and may be positioned in alignment with the lower gripping groove (172) to guide the cable (10) entering from the outside toward the lower gripping groove (172).

[0111] The locking plate (181) may have an upper guide groove (181a) formed on its lower surface that is opposite to the lower guide groove (144b) in the vertical direction.

[0112] The upper guide groove (181a) can form a semicircular shape and, when the locking plate (181) is closed, can combine with the lower guide groove (144b) to form a circular hollow structure.

[0113] Accordingly, the upper guide groove (181a) and the lower guide groove (144b) can restrict the detachment and movement of the cable (10) located inside, which forms a cylindrical shape when the locking plate (181) is closed.

[0114] The above front plate (144) may have a locking groove (144c) formed on the rear end of the upper surface.

[0115] The locking plate (181) may have a locking projection (186) formed on the lower rear end of the lower surface that protrudes downward and is inserted into the locking groove (144c).

[0116] The locking projection (186) can be inserted into the locking groove (144c) when the locking plate (181) is closed.

[0117] The above locking projection (186) may have a shape corresponding to the locking groove (144c), and may be structured so that the coupling state is maintained by physical frictional force or elastic restoring force when inserted into the locking groove (144c).

[0118] Through this, the locking plate (181) can be firmly fixed to the front plate (144) by simply pressing the pivot handle (183).

[0119] The above-mentioned pivot handle (183) is provided on the other side of the locking plate (181) and can enable rotation of the locking plate (181) through gripping with a hand.

[0120] The above-mentioned pivot handle (183) can be shaped to be easy to grip with the hand.

[0121] For example, the above-mentioned pivot handle (183) may be made of a bolt that is screwed to the other side of the locking plate (181) with a head formed at the other end and a thread formed on the outer surface of the first end.

[0122] The locking plate (181) may have a rotating handle groove formed on the other side to which one end of the rotating handle (183) is screw-coupled.

[0123] The above-mentioned pivot handle (183) is made of a bolt and the length protruding from the locking plate (181) can be adjusted according to rotation.

[0124] The above locking part (180) may further include a locking means (187) for connecting the locking plate (181) in a closed state to the front plate (144).

[0125] The above locking means (187) may be made of a bolt having a head formed on the upper part and a screw thread formed on the lower outer surface, and the lower part penetrates the upper and lower surfaces of the locking plate (181) and is inserted into the upper part of the front plate (144) so ​​as to lock the locking plate (181) to the front plate (144).

[0126] The locking plate (181) may have a through hole (181b) formed on the other side that penetrates the upper and lower surfaces so that the lower part of the locking means (187) passes through.

[0127] The above front plate (144) may have a coupling groove (144d) formed on the other upper surface into which the lower part of the locking means (187) is inserted and coupled.

[0128] The above coupling groove (144d) can be screw-coupled to the locking means (187) by forming screw threads on its inner surface.

[0129] The above through hole (181b) may have screw threads formed on its inner surface.

[0130] The above locking means (187) can be maintained in a screw-coupled state without detaching from the locking plate (181) even when released from the coupling groove (144d).

[0131] As a result, the locking means (187) can maintain the pressurized state of the cable (10) when measuring the transmission characteristics of the cable (10) by locking the locking plate (181) to the front plate (144).

[0132] In addition, the locking means (187) is maintained in a state of constant connection to the through hole (181b) even when the locking plate (181) is open, thereby preventing loss that may occur during measurement work and improving work convenience when re-fastening.

[0133] The above fixing device (100) may further include a pressing part (190) for pressing the cable conductor (20) inserted into the fastening hole (131) onto the printed circuit board (110) as shown in FIGS. 1 to 4 and FIGS. 7.

[0134] The above-mentioned pressure member (190) can press the cable conductor (20) inserted into the above-mentioned fastening hole (131) in the direction of the circuit pattern of the above-mentioned printed circuit board (110) to ensure the reliability of the electrical contact.

[0135] The above-mentioned pressure member (190) is configured to press the cable conductor (20) aligned on the printed circuit board (110) through the fastening hole (131) downward to maintain contact, and may include a first support member (191) whose lower portion is integrally formed on one side of the upper surface of the rear plate (143), a second support member (192) whose lower portion is integrally formed on the other side of the upper surface of the rear plate (143), a pressure block (193) whose rear end is rotatably fixed between the first support member (191) and the second support member (192) and has a pressure projection (193a) formed on its front end that protrudes downward to press the cable conductor (20) inserted into the fastening hole (131), and a rotation control means (194) for locking the rotation of the pressure block (193).

[0136] The first support (191) and the second support (192) are integrally formed on both sides of the upper surface of the rear plate (143) so as to be spaced apart by a certain distance in the left and right directions, and can support the pressure block (193) so as to rotate stably.

[0137] The above pressure block (193) can be rotatably connected by a rotation axis (not shown) that is positioned horizontally between the first support (191) and the second support (192) at its rear end.

[0138] The above-mentioned pressure member (190) may further include a stop plate (190a) that contacts the pressure block (193), which rotates backward while integrally connecting the rear ends of the first support member (191) and the second support member (192), thereby stopping the rotation.

[0139] The above pressure block (193) may have a gripping handle (195) formed on the upper front portion.

[0140] The above gripping handle (195) can enable rotation of the above pressure block (193) through gripping with the hand.

[0141] The above gripping handle (195) can be formed in a shape that is easy to grip with the hand.

[0142] For example, the gripping handle (195) may be made of a bolt that is screw-coupled to the upper part of the pressure block (193) with a head formed on the upper part and threads formed on the lower outer surface.

[0143] The above pressure block (193) may have a gripping handle groove formed on its upper surface to which the lower part of the gripping handle (195) is screw-coupled.

[0144] The above gripping handle (195) is made of a bolt, and the length protruding from the pressure block (193) can be appropriately adjusted according to rotation.

[0145] Accordingly, the above-mentioned pressure block (193) can be easily rotated around a rotation axis.

[0146] The above pressure block (193) can be rotated in a vertical direction so that the rear end faces upward, allowing the pressure projection (193a) to be withdrawn from the fastening hole (131).

[0147] When the above pressure block (193) is rotated in a vertical direction, the pressure projection (193a) is withdrawn from the fastening hole (131), and the cable (10) can be detached and opened.

[0148] At this time, the pressure block (193) may stop rotating while in contact with the stop plate (190a).

[0149] Conversely, the pressure block (193) can be rotated in a horizontal direction so that its rear end faces the rear, allowing the pressure projection (193a) to be inserted into the fastening hole (131).

[0150] When the above pressure block (193) is rotated in a horizontal direction, the pressure projection (193a) is inserted into the fastening hole (131), and a binding state can be achieved in which the cable (10) is not detached.

[0151] As a result, the pressure block (193) is rotated in a horizontal direction so that the pressure projection (193a) is inserted into the fastening hole (131), thereby allowing the cable conductor (20) to be closely attached and electrically connected to the circuit pattern of the printed circuit board (110).

[0152] The above rotation adjustment means (194) may include a support frame (196) that is fixed to the upper part of the first support (191) as shown in FIG. 4 or FIG. 7 and forms a 'U' shape with the other end facing the second support (192) open, and an adjustment bar (197) that has one end fixed to the inside of the support frame (196) so as to be rotatable, and whose other end is positioned on the upper part of the pressure block (193) as it rotates to lock the rotation of the pressure block (193) or whose other end is separated from the upper part of the pressure block (193) so as to be able to rotate the pressure block (193).

[0153] The above adjustment bar (197) can be rotatably fixed to the support frame (196) by means of an adjustment member (198).

[0154] The above adjustment member (198) may be formed in the shape of a bolt, having a head formed on the upper part and screw threads formed on the lower outer surface.

[0155] The lower part of the adjustment member (198) penetrates the support frame (196) and is fixed to the upper part of the first support member (192), thereby fixing the support frame (196) to the first support member (191) and simultaneously rotatably fixing the adjustment bar (197) to the support frame (196).

[0156] The above adjustment bar (197) may have an adjustment handle (199) integrally formed on the upper surface of the other end.

[0157] The above adjustment knob (199) can enable rotation of the above adjustment bar (197) through gripping with the hand.

[0158] When the adjustment bar (197) is rotated to lock the pressure block (193), its other end may be positioned on the upper part of the pressure block (193) while rotating in the direction of the pressure block (193) around the adjustment member (198). At this time, the adjustment bar (197) may stop rotating while in contact with the gripping handle (195).

[0159] Accordingly, the adjustment bar (197) can lock the rotation of the pressure block (193).

[0160] When the above adjustment bar (197) is rotated to unlock the above pressure block (193), the other end may rotate in a direction opposite to the above pressure block (193) around the adjustment member (198) and move away from the above pressure block (193). At this time, the rotation of the above adjustment bar (197) may stop while in contact with one side inner surface of the support frame (196).

[0161] Accordingly, the adjustment bar (197) can unlock the rotation of the pressure block (193).

[0162] As a result, the fixing device (100) can firmly lock the pressure block (193) by simply rotating the adjustment bar (197).

[0163] The above fixing device (100) can provide an optimal environment for stably and precisely measuring the transmission characteristics of high-frequency signals by preventing contact failures that may occur due to external vibrations or the elasticity of the cable during measurement.

[0164] The above description is merely an example for implementing a fixing device for measuring transmission characteristics that allows for easy cable attachment and detachment according to the present invention. The present invention is not limited to the above-described example, and the technical spirit of the present invention extends to the scope in which various modifications can be made by anyone with ordinary knowledge in the field to which the invention belongs, without departing from the gist of the invention as claimed in the following patent claims. Explanation of the symbols

[0165] 10 : Cable 20 : Cable conductor 100 : Fixture 110 : Printed circuit board 120: Transmission socket 130: Conductor support plate 140 : Fixed part 150 : Support part 160 : Fastening means 170 : Guide means 180: Locking part 190: Pressurizing part

Claims

Claim 1 A fixing device for measuring electrical transmission characteristics of a cable in which the sheathing of the end is removed so that the cable conductor is exposed to the outside, comprising: a printed circuit board having a circuit pattern formed thereon for signal transmission; a one-port type transmission socket provided at the rear end of the printed circuit board and electrically connected to an external measuring device; a conductor support plate disposed on the upper surface of the front end of the printed circuit board to guide the cable conductor to be electrically connected to the circuit pattern of the printed circuit board; a fixing part to which the printed circuit board is fixed; a supporting part supporting the fixing part; and a fastening means for fixing the supporting part to the fixing part, wherein the conductor support plate has a fastening hole formed therein that penetrates the upper and lower surfaces of the front end and allows the cable conductor to be inserted to be electrically connected to the circuit pattern of the printed circuit board, and the fixing part comprises a base plate on which the printed circuit board is seated on the upper surface.and includes a fixing member for fixing the printed circuit board to the upper surface of the base plate, wherein the base plate comprises a rear plate on which the printed circuit board is seated and fixed on the upper surface, and a front plate on which the cable is seated on the upper surface, the rear end of which is integrally formed with the front end of the rear plate, and further includes a guide means for guiding the seating position of the cable on the front plate so that the cable conductor is inserted into the fastening hole and coupled, wherein the guide means includes a guide plate formed on the upper surface of the rear plate, and having a lower gripping groove formed on the upper surface on which the lower part of the cable is seated in the longitudinal direction, extending from the front end to the rear end, and the support member includes a pair of balance maintaining bars with both ends extended in the front-rear direction and fixed to the lower sides of the base plate by the fastening means, wherein the fastening means has a head portion formed at the other end and a screw thread formed on the outer circumference of one end, and the one end passes through both sides of the balance maintaining bar and is inserted into the side of the base plate and fixed, thereby fixing the balance maintaining bar to the base plate, and the balance maintaining bar includes the A fixing device for measuring transmission characteristics that facilitates easy cable attachment and detachment, characterized in that a binding hole through which one end of a fastening means passes is formed extending in the longitudinal direction, and the base plate has guide grooves formed on both sides to allow the balance maintaining bar to move in the forward and backward directions.

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