阅读说明：本技术 一种数据中心母线槽单元体温升监控装置 (Temperature rise monitoring device for bus duct unit body of data center ) 是由 马见雄 于 2021-09-16 设计创作，主要内容包括：本发明涉及一种数据中心母线槽单元体温升监控装置,包括呈镜像配合设置的两个壳体、位于壳体两侧的成组动触头、接地端子,壳体两侧设有第一凹口和第二凹口,动触头内侧设有触头座,壳体内的支撑板与动触头之间设有弹片,弹片与支撑板之间连接有穿过动触头的温度传感器电阻,温度传感器电阻连接的PCBA板上设有A/D转换电路、FPGA控制器、无线收发模块,PCBA板连接有数码管、报警器,结构紧凑可拆卸安装、动触头与数据中心母线槽单体任意端旋转接插时、以弹片弹性压紧支撑取电、并以温度传感器电阻传感无线远程传输、实时显示监控和报警实现数据中心母线槽单元体的温升监控,提高母线系统运行可靠性、安全性和使用寿命。(The invention relates to a temperature rise monitoring device for a unit body of a bus duct of a data center, which comprises two shells which are arranged in a mirror image matching manner, a group of moving contacts and a grounding terminal which are positioned on two sides of the shells, wherein a first notch and a second notch are arranged on two sides of the shells, a contact seat is arranged on the inner side of the moving contact, an elastic sheet is arranged between a support plate and the moving contact in the shells, a temperature sensor resistor which penetrates through the moving contact is connected between the elastic sheet and the support plate, an A/D conversion circuit, an FPGA controller and a wireless transceiver module are arranged on a PCBA plate which is connected with the temperature sensor resistor, the PCBA plate is connected with a nixie tube and an alarm, the temperature rise monitoring device is detachably mounted in a compact structure, when the moving contact is rotatably connected with any end of a single body of the bus duct of the data center, the elastic pressing support is used for electricity taking, wireless remote transmission by the resistance sensing of the temperature sensor, real-time display monitoring and alarm are realized, the operation reliability and the safety of the bus system are improved, and the service life of the bus system is prolonged.)

1. The temperature rise monitoring device for the bus duct unit body of the data center is characterized by comprising two shells (1) which are arranged in a mirror image matching mode, a group of moving contacts (2) which are arranged on two sides of the shells (1) and a grounding terminal (3) which is arranged on the end portion of the shells (1), wherein a first notch (4) and a second notch (5) which are correspondingly matched with the moving contacts (2) are arranged on two sides of each shell (1), the outer side of each moving contact (2) protrudes out of the corresponding shell (1), a contact seat (6) which is in sliding limit matching with the corresponding shell (1) is arranged at one end of the inner side of each moving contact (2), a third notch (7) which is arranged at the other end of the inner side of each moving contact (2) in a way of being abdicating with the contact seat (6) of the adjacent moving contact (2) is arranged at one end of the inner side of each moving contact (2), and a copper nose (8) is connected onto each contact seat (6);

the improved moving contact is characterized in that a supporting plate (9) located inside the moving contact (2) is arranged in the shell (1), an elastic sheet (10) is arranged between the supporting plate (9) and the moving contact (2), a temperature sensor resistor (11) penetrating through the moving contact (2) is connected between the elastic sheet (10) and the supporting plate (9), and a wiring hole (12) is formed in the tail of the shell (1).

2. The temperature rise monitoring device for the bus duct unit body of the data center according to claim 1, wherein edges of two sides of the shell (1) are provided with a fourth notch (13) and a first boss (14) which are matched with each other, the second boss (15) is arranged inside two sides of the shell (1), the second bosses (15) on two sides are provided with a threaded counter bore (16) and a first through hole (17) which are matched with each other, the tail of the shell (1) is provided with a first limiting plate (18), and the first limiting plate (18) is provided with at least one mounting hole (19) corresponding to the second boss (15).

3. The temperature rise monitoring device for the bus duct unit bodies of the data center according to claim 1, wherein the moving contact (2) is frame-shaped, the outer side of the moving contact is bent into a U-shaped structure, and a plurality of fifth notches (20) which are arranged at intervals and extend to two sides are arranged on the outer side of the moving contact (2).

4. The temperature rise monitoring device for the bus duct unit body of the data center according to claim 1, wherein a protection plate (21) in sliding fit with the outer wall of the movable contact (2) is arranged outside each of the first notch (4) and the second notch (5), the support plate (9) is arranged close to the first notch (4), a hollow sliding table (22) which is arranged close to the second notch (5) and in sliding fit with the bottom of the contact seat (6) is arranged in the shell (1), and second limiting plates (23) in limiting fit are arranged on two sides of the hollow sliding table (22) and two sides of the contact seat (6).

5. The temperature rise monitoring device for the bus duct unit body of the data center according to claim 1, wherein a sixth notch (24) is formed in the movable contact (2) and is close to the third notch (7), and a third boss (25) which is close to the second notch (5) and is in sliding fit with the sixth notch (24) is formed in the shell (1).

6. The temperature rise monitoring device for the bus duct unit body of the data center according to claim 1, wherein the elastic sheet (10) comprises a straight segment (101) matched with the inner wall of the outer side of the movable contact (2), a first wave band (102) and a second wave band (103) connected with two ends of the straight segment (101), a first abutting plate (26) is arranged at the end of the first wave band (102), a third limiting plate (27) which is close to the second notch (5) and is in limit fit with the first abutting plate (26) is arranged on the shell (1), and a second abutting plate (28) connected with the supporting plate (9) and the temperature sensor resistor (11) is arranged at the end of the second wave band (103).

7. The temperature rise monitoring device for the bus duct unit bodies of the data center according to claim 6, wherein folding edges (29) respectively located at two sides of the third limiting plate (27) and the supporting plate (9) are respectively arranged at two sides of the first abutting plate (26) and the second abutting plate (28).

8. The temperature rise monitoring device for the bus duct unit body of the data center according to claim 1, wherein the elastic sheet (10), the supporting plate (9) and the moving contact (2) are provided with second through holes (30) correspondingly provided with temperature sensor resistors (11).

9. The temperature rise monitoring device for the bus duct unit bodies of the data center according to any one of claims 1 to 8, wherein the temperature sensor resistor (11) is connected with a PCBA board, an A/D conversion circuit for converting a resistor voltage division value into a digital signal, an FPGA controller for receiving the A/D conversion circuit and performing logic operation, and a wireless transceiver module for receiving and sending temperature rise data of the FPGA controller are arranged on the PCBA board, and the PCBA board is connected with a power supply for supplying power and a nixie tube for receiving and displaying the temperature rise data of the FPGA controller.

10. The temperature rise monitoring device for the bus duct unit bodies of the data center according to claim 9, wherein the PCBA is connected with an alarm in a form including but not limited to sound and light for receiving an alarm signal of the FPGA controller.

Technical Field

The invention relates to a temperature rise monitoring device for a bus duct unit body of a data center, and belongs to the technical field of bus duct monitoring.

Background

Data center market scale presents the trend of increasing under the rapid development of internet trade, and data center bus adopts modular structure for traditional distribution mode, mainly includes starting end case, bus joint connector, bus duct body, connects plug-in box, support piece and end case isotructure, has saved first cabinet of row and cable, has improved the utilization ratio of equipment, has reduced the loss of electric energy by a wide margin. The bus duct system unit body and the power taking lead of the plug box have full-point plugging, the plug box is customized as required, the position or capacity of a load changes, and the plug box can be replaced online.

Disclosure of Invention

The invention aims to provide a temperature rise monitoring device for a bus duct unit body of a data center, which is compact in structure, can be detachably mounted, uses elastic pieces to elastically press and support for power taking when a moving contact is rotatably connected and plugged with any end of a bus duct unit body of the data center, uses a temperature sensor for resistance sensing wireless remote transmission, displays and monitors in real time and alarms to realize temperature rise monitoring of the bus duct unit body of the data center, and improves the operation reliability, safety and service life of a bus system.

The invention is realized by the following technical scheme:

a temperature rise monitoring device for a bus duct unit body of a data center comprises two shells which are arranged in a mirror image matching mode, a group of moving contacts which are arranged on two sides of the shells and a grounding terminal which is arranged at the end part of the shells, wherein a first notch and a second notch which are correspondingly matched with the moving contacts are arranged on two sides of the shells;

a supporting plate positioned in the moving contact is arranged in the shell, an elastic sheet is arranged between the supporting plate and the moving contact, a temperature sensor resistor penetrating through the moving contact is connected between the elastic sheet and the supporting plate, and a wiring hole is formed in the tail of the shell;

the edge of two sides of the shell is provided with a fourth notch and a first boss which are matched with each other, the second bosses are arranged inside two sides of the shell, the second bosses on two sides are provided with a thread counter bore and a first through hole which are matched with each other, the tail part of the shell is provided with a first limiting plate, and the first limiting plate is provided with at least one mounting hole corresponding to the second boss;

the movable contact is in a frame shape, the outer side of the movable contact is bent into a U-shaped structure, a plurality of fifth notches which are arranged at intervals and extend to two sides of the movable contact are arranged on the outer side of the movable contact, protective plates which are in sliding fit with the outer wall of the movable contact are arranged outside the first notches and the second notches, the supporting plate is arranged close to the first notches, a hollow sliding table which is arranged close to the second notches and is in sliding fit with the bottom of the contact seat is arranged in the shell, second limiting plates which are in limiting fit are arranged on two sides of the hollow sliding table and two sides of the contact seat, a sixth notch which is arranged close to the third notch is arranged on the movable contact, and a third boss which is arranged close to the second notch and is in sliding fit with the sixth notch is arranged on the shell;

the shell comprises a moving contact, a shell and a spring piece, wherein the moving contact is arranged on the shell, the shell comprises a moving contact and a first notch, the moving contact is arranged on the shell, the shell comprises a straight section matched with the inner wall of the outer side of the moving contact, a first wave band and a second wave band, the first wave band is connected with two ends of the straight section, a first abutting plate is arranged at the end part of the first wave band, a third limiting plate which is close to the second notch and is in limit fit with the first abutting plate is arranged on the shell, and a second abutting plate which is connected with a supporting plate and a temperature sensor resistor is arranged at the end part of the second wave band;

the temperature sensor is characterized in that the temperature sensor is in resistance connection with a PCBA board, an A/D conversion circuit for converting a resistance voltage division value into a digital signal, an FPGA controller for receiving the A/D conversion circuit and performing logic operation and a wireless receiving and transmitting module for receiving and transmitting temperature rise data of the FPGA controller are arranged on the PCBA board, and the PCBA board is connected with a power supply for supplying power and a nixie tube for receiving and displaying the temperature rise data of the FPGA controller;

the PCBA board is connected with an alarm which is used for receiving alarm signals of the FPGA controller and comprises sound and light modes.

The invention has the beneficial effects that:

(1) the two shells are in mirror image fit and closed to form an integral structure, the moving contact is arranged in a first notch and a second notch which are correspondingly matched with the two shells, the moving contact is arranged under the prepressing of an internal elastic sheet through the sliding fit of a contact seat and a shell hollow sliding table, the sliding fit of a sixth notch and a shell third boss, the sliding fit of an outer wall and a shell protection plate, and the elastic support is arranged under the prepressing of the internal elastic sheet, a first wave band and a second wave band of the elastic sheet are respectively installed under the support of a first abutting plate and a third limiting plate, and a second abutting plate and a supporting plate in a prepressing mode, and the structure is compact, the number of accessories is small, and the processing and installation are easy, and the moving contact can be disassembled and replaced;

(2) when the device is inserted into the bus duct from the bottom of the data center bus duct monomer, the U-shaped busbar is clamped, the movable contact is pressed to compress the elastic sheet, the third notch is a contact seat sliding abdication of the adjacent movable contact, the movable contact is reliably contacted with the U-shaped busbar to take electricity under the action of the restoring force of the elastic sheet, and the power distribution is led out through a copper nose lead on the contact seat;

(3) the contact ends of the elastic sheet, the moving contact and the U-shaped bus bar sense the temperature to the temperature sensor resistor and are led out to the PCBA board, so that the temperature rise resistor voltage division value during power distribution at any position of the bus duct unit body is converted into a digital signal through an A/D conversion circuit, the FPGA controller performs logic operation to obtain temperature rise data, an alarm signal is transmitted to the wireless receiving and transmitting module for wireless transmission remote monitoring, the nixie tube is used for displaying and monitoring in real time, and an alarm gives an alarm, so that the temperature rise monitoring of the bus duct unit body in the data center is realized, and the operation reliability, safety and service life of a bus system are improved.

Drawings

FIG. 1 is a block diagram of the present invention.

Fig. 2 is an internal structural view of the present invention omitting a housing.

Fig. 3 is a left side view of the assembly structure of the present invention.

Fig. 4 is a right side assembly view of the present invention.

Fig. 5 is a left side perspective view of the housing of the present invention.

Fig. 6 is a right perspective view of the housing of the present invention.

Fig. 7 is a perspective view of the movable contact of the present invention.

Fig. 8 is a perspective view of the spring plate of the present invention.

FIG. 9 is a state diagram of the present invention inserted into a data center bus bar unit.

FIG. 10 is a rotated connector to a data center bus bar unit according to the present invention.

Fig. 11 is a structure view of temperature rise detection of the present invention.

The labels in the figure are: the contact comprises a shell 1, a moving contact 2, a grounding terminal 3, a first notch 4, a second notch 5, a contact seat 6, a third notch 7, a copper nose 8, a supporting plate 9, an elastic sheet 10, a temperature sensor resistor 11, a wiring hole 12, a fourth notch 13, a first boss 14, a second boss 15, a threaded counter bore 16, a first through hole 17, a first limiting plate 18, a mounting hole 19, a fifth notch 20, a protective plate 21, a hollow sliding table 22, a second limiting plate 23, a sixth notch 24, a third boss 25, a straight sheet section 101, a first wave band 102, a second wave band 103, a first abutting plate 26, a third limiting plate 27, a second abutting plate 28, a folded edge 29, a second through hole 30, a bus duct unit body 31 and a U-shaped bus bar 32.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

A temperature rise monitoring device for a bus duct unit body of a data center comprises two shells 1 which are arranged in a mirror image matching mode, a group of moving contacts 2 which are arranged on two sides of the shells 1 and a grounding terminal 3 which is arranged at the end part of the shells 1, wherein a first notch 4 and a second notch 5 which are correspondingly arranged in a matching mode and are used for the moving contacts 2 are arranged on two sides of the shells 1, the outer side of each moving contact 2 protrudes out of the shells 1, a contact seat 6 which is in sliding limiting matching with the shells 1 is arranged at one end of the inner side of each moving contact 2, a third notch 7 which is arranged in a way of stepping down with the contact seat 6 of the adjacent moving contact 2 is arranged at the other end of the inner side of each moving contact 2, and a copper nose 8 is connected onto each contact seat 6;

a supporting plate 9 positioned in the moving contact 2 is arranged in the shell 1, an elastic sheet 10 is arranged between the supporting plate 9 and the moving contact 2, a temperature sensor resistor 11 penetrating through the moving contact 2 is connected between the elastic sheet 10 and the supporting plate 9, and a wiring hole 12 is arranged at the tail part of the shell 1;

the edge of two sides of the shell 1 is provided with a fourth notch 13 and a first boss 14 which are matched, the inner parts of two sides of the shell 1 are provided with second bosses 15, the second bosses 15 on two sides are provided with a thread counter bore 16 and a first through hole 17 which are matched, the tail part of the shell 1 is provided with a first limiting plate 18, and the first limiting plate 18 is provided with at least one mounting hole 19 corresponding to the second boss 15;

the movable contact 2 is in a frame shape, the outer side of the movable contact 2 is bent into a U-shaped structure, a plurality of fifth notches 20 which are arranged at intervals and extend to two sides of the movable contact 2 are arranged on the outer side of the movable contact 2, guard plates 21 which are in sliding fit with the outer wall of the movable contact 2 are arranged outside the first notches 4 and the second notches 5, the supporting plate 9 is arranged close to the first notches 4, hollow sliding tables 22 which are arranged close to the second notches 5 and are in sliding fit with the bottoms of the contact seats 6 are arranged in the shell 1, second limiting plates 23 which are in limiting fit are arranged on two sides of each hollow sliding table 22 and two sides of each contact seat 6, sixth notches 24 which are arranged close to the third notches 7 are arranged on the movable contact 2, and third bosses 25 which are arranged close to the second notches 5 and are in sliding fit with the sixth notches 24 are arranged on the shell 1;

the elastic sheet 10 comprises a straight section 101 matched with the inner wall of the outer side of the moving contact 2, and a first wave band 102 and a second wave band 103 which are connected with two ends of the straight section 101, wherein a first abutting plate 26 is arranged at the end part of the first wave band 102, a third limiting plate 27 which is close to the second notch 5 and is in limit fit with the first abutting plate 26 is arranged on the shell 1, a second abutting plate 28 which is connected with the support plate 9 and the temperature sensor resistor 11 is arranged at the end part of the second wave band 103, two sides of the first abutting plate 26 and the second abutting plate 28 are respectively provided with a folded edge 29 which is respectively positioned at two sides of the third limiting plate 27 and the support plate 9, and the elastic sheet 10, the support plate 9 and the moving contact 2 are provided with second through holes 30 which are correspondingly provided with the temperature sensor resistor 11;

the temperature sensor resistor 11 is connected with a PCBA board, an A/D conversion circuit for converting a resistor voltage division value into a digital signal, an FPGA controller for receiving the A/D conversion circuit and performing logic operation, and a wireless receiving and transmitting module for receiving and transmitting temperature rise data of the FPGA controller are arranged on the PCBA board, and the PCBA board is connected with a power supply for supplying power and a nixie tube for receiving and displaying the temperature rise data of the FPGA controller;

the PCBA board is connected with an alarm which is used for receiving alarm signals of the FPGA controller and comprises sound and light modes.

The working principle of the invention is as follows:

referring to the attached drawings, two shells 1 are in mirror image matching and are closed to form an integral structure, a grounding terminal 3 is arranged in one shell 1, a moving contact 2 is arranged in a first notch 4 and a second notch 5 which are correspondingly matched with the two shells 1, the moving contact 2 is in a frame shape, the outer side of the moving contact is bent to form a U-shaped structure, the moving contact protrudes out of the shell 1, and the inner side of the moving contact and a contact seat 6 form an integral structure;

a part of the moving contact 2 is arranged in the first notch 4 and is limited by sliding fit with the guard plate 21 through the outer wall, the bottom of a contact seat 6 of the moving contact 2 is in sliding fit with a hollow sliding table 22 close to the second notch 5, the moving contact 2 is limited by second limiting plates 23 on two sides of the hollow sliding table 22 and two sides of the contact seat 6, the contact seat 6 is connected with a copper nose 8 in a riveting mode, and the hollow sliding table 22 is used for sliding abdication of a riveting part;

the elastic sheet 10 positioned in the moving contact 2 is limited with the limiting plate through the folded edge 29 of the second abutting plate 28, the end part of the temperature sensor is limited with the supporting plate 9, the temperature sensor penetrates through the supporting plate 9 and the second through hole 30 on the second abutting plate 28 of the elastic sheet 10 and is locked by a nut and penetrates through the second through hole 30 of the moving contact 2 to fix the elastic sheet 10 and the temperature sensor, when the two shells 1 are closed, the third limiting plate 27 close to the second notch 5 is matched with the first abutting plate 26 to pre-press the elastic sheet 10, the folded edge 29 of the first abutting plate 26 is positioned in the moving contact 2 and is matched with two sides of the third limiting plate 27, the straight section 101 is tightly attached to the inner wall of the outer side of the moving contact 2 when the elastic sheet 10 is under the elastic force of the first wave band 102 and the second wave band 103, and the installation of the elastic sheet 10 is realized and the moving contact 2 is elastically supported by the elastic sheet 10;

when the two shells 1 are closed, the fourth notches 13 on the edges of the two sides are matched with the first bosses 14 for closure, so that the closure tightness and the alignment speed after closure are enhanced, the first notches 4 and the guard plates 21 outside the second notches 5 of the two shells 1 are closed and are in sliding fit with the outer wall of the movable contact 2, the sixth notch 24 on the movable contact 2, which is close to the third notch 7, is in sliding limit fit with the third boss 25 on the shell 1, which is close to the second notch 5, so that the positioning and installation of the movable contact 2 are ensured, the two shells 1 are in threaded fit with the threaded counter bore 16 through the first through hole 17 through the bolt, so that the closed installation is realized, and the movable contacts 2 grouped at two sides are detachably installed on the shells 1;

leads of the copper nose 8 and the grounding terminal 3 are led out from a closed wiring hole 12 and used for power distribution of the bus duct, leads of the temperature sensor resistor 11 are led out from the wiring hole 12 and used for being electrically connected with a PCBA (printed circuit board assembly) for temperature rise monitoring, and the wireless transceiver module is used for being connected with a bus monitoring system terminal through wireless transmission and carrying out real-time transmission monitoring; the two shells 1 are matched with each other in a mirror image manner to be provided with the group moving contacts 2 at two sides, so that the structure is compact, the number of accessories is small, and the movable contact type switch is easy to process, install, disassemble and replace;

when the device is inserted into a bus duct from the bottom of a bus duct monomer of a data center, the outer side of a U-shaped movable contact 2 is inserted into a U-shaped busbar with the inner side bent oppositely to clamp the movable contact 2 through rotating the whole, the movable contact 2 extrudes an elastic sheet 10, the movable contact 2 stably slides towards the inside of a shell 1 under the sliding fit of a contact seat 6 and a hollow sliding table 22, the sliding fit of a sixth notch 24 and a third boss 25 and the sliding fit of the outer wall and a protection plate 21, and the third notch 7 gives way for the sliding of the contact seat 6 of the adjacent movable contact 2;

the first wave band 102 and the second wave band 103 of the elastic sheet 10 are compressed under the support of the first abutting plate 26 and the third limiting plate 27, the second abutting plate 28 and the support plate 9 respectively, the straight sheet section 101 and two sides of the U-shaped busbar driven contact 2 abut tightly, the movable contact 2 is reliably contacted with the U-shaped busbar to get electricity under the action of the restoring force of the elastic sheet 10, and the electricity is led out through a copper nose 8 lead on the contact seat 6 to be distributed, the U-shaped part is easy to process and the contact area with the busbar is ensured by the fifth notch 20, the grounding terminal 3 is contacted with the busbar shell 1 to be grounded, the first limiting plate 18 is in limit fit with the busbar unit shell 1 along with rotation, the mounting hole 19 is used for being connected with a plug box, a PCBA plate, a power supply and a nixie tube and an alarm are arranged on the plug box;

the contact ends of the elastic sheet 10, the moving contact 2 and the U-shaped busbar sense the temperature to the temperature sensor resistor 11 and are led out to the PCBA board, so that the temperature rise during power distribution at any position of the bus duct unit body is converted into a digital signal which can be recognized by the FPGA controller through the temperature sensor resistor 11, the change of the partial pressure value of different resistance values is represented at different temperatures, the digital signal is converted into a digital signal through an A/D conversion circuit, the FPGA controller carries out logic operation according to the digital signal to obtain temperature rise data and an alarm signal which is higher than a threshold value, and the alarm signal is transmitted to the wireless transceiving module JF24D for wireless transmission remote monitoring and is transmitted to the nixie tube for real-time display monitoring, and the abnormal temperature rise alarm signal is transmitted to an alarm which comprises but is not limited to sound and light forms for warning, so that the temperature rise monitoring of the bus duct unit body in a data center is realized, and the operation reliability, the safety and the service life of a bus system are improved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the logical operation of the FPGA controller belongs to the prior art and is not described again; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.