Intelligent safety power utilization monitoring and alarming device

Abstract

The application discloses a kind of wisdom safety power utilization monitoring alarm device, it is related to power utilization monitoring alarm device technical field;Including the clamping assembly of installation in the outside of socket main body, adjustable installation is carried out on the clamping assembly with mounting bracket, mounting bracket is installed with mounting box, and mounting box is filled with compressed fire extinguishing medium.The application is by being equipped with mounting box, nozzle head, heat transfer component and the like structure, can be in use, make heat transfer component adhere to plug surface, if there is abnormal heating even the case of fire, can be based on heat transfer component to heat transfer wire, heat transfer frame, heat transfer, heat transfer frame is heated to baffle, since baffle adopts the material that is deformed by heat, heated baffle is deformed, thereby loses the limiting effect of plugging plug, plugging plug is broken under pressure, fire extinguishing medium is sprayed from mounting box to plug, prevent danger further expands.

Description

Technical Field

[0001] This invention relates to the field of electricity monitoring and alarm devices, and in particular to a smart and safe electricity monitoring and alarm device. Background Technology

[0002] In recent years, with the widespread use of electrical appliances and the continuous growth of electricity load, electrical safety issues have become increasingly prominent. Among these, the connection between power sockets and plugs is particularly prone to abnormal heating, arcing, and even fires due to frequent plugging and unplugging, poor contact, overload, or aging components, making it a significant potential hazard for electrical fires. Such fires typically begin with the accumulation of localized high temperatures; if not detected and extinguished in time, they can spread rapidly, causing equipment damage, property loss, and even personal injury or death.

[0003] Currently, electrical fire prevention in socket areas mainly relies on traditional passive protection methods. Common wall sockets typically lack temperature monitoring and fire suppression capabilities. Standalone fire alarms (such as smoke detectors and temperature alarms) are mostly installed on the ceiling or walls to monitor changes in ambient smoke or air temperature. However, initial overheating or small flames in a socket may not quickly trigger significant changes in environmental parameters, causing these alarms to respond late and miss the optimal intervention window. Furthermore, even with timely alarms, firefighting still requires manual intervention, posing risks related to reaction time and operational procedures. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a smart and safe electricity monitoring and alarm device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A smart and safe electricity monitoring and alarm device includes a clamping assembly installed on the outside of a socket body. An adjustable mounting bracket is mounted on the clamping assembly, and a mounting box is mounted on the mounting bracket. The mounting box is filled with compressed extinguishing media, such as dry powder or carbon dioxide. A nozzle head is located on the side of the mounting box near the socket body. The nozzle head has a central chamber and a side chamber. The central chamber communicates with the interior of the mounting box. The sealing block has an inverted trapezoidal structure. A stop block is installed in the side chamber. One end of the stop block has a wedge-shaped structure adapted to the sealing block, and one end of the stop block extends through the side chamber to one side of the sealing block, thus limiting the sealing block's position. The stop block is made of a heat-deformable material, such as paraffin wax or a low-melting-point alloy. A heat transfer assembly is mounted on the clamping assembly. The heat transfer assembly is connected to a heat transfer frame via a heat transfer wire. The heat transfer frame passes through the stop block and is fixed in the side chamber.

[0006] As a preferred embodiment of the present invention: the heat transfer component includes a clamping frame, which is slidably mounted on the clamping component. The clamping frame and the clamping component are connected by a clamping spring. A heat transfer plate is fixed to one end of the clamping frame, and a silicone strip is fixed to the side of the clamping frame near the socket body.

[0007] As a preferred embodiment of the present invention: the clamping assembly includes an upper fixed frame and a lower fixed frame, both of which are U-shaped structures. The upper fixed frame is fixed with connecting columns at both ends, and the lower fixed frame is slidably connected to the outer wall of the connecting columns. The connecting columns pass through the lower fixed frame and are connected by a locking screw for fixing the lower fixed frame. Anti-slip pads are provided on the side of the upper and lower fixed frames near the socket body. The clamping frame is slidably installed on the lower fixed frame.

[0008] As a preferred embodiment of the present invention: an airbag chamber is installed on the lower fixed frame, an alarm is installed inside the airbag chamber, a heat transfer pad is fixed on the top of the alarm, and the heat transfer pad is connected to the heat transfer sheet through a heat-conducting wire; a touch button is installed on the inner wall of the end of the airbag chamber away from the heat transfer pad, and an alarm is installed at the end of the airbag chamber; annular pleats are provided on the outer side of the elastic airbag to facilitate the deformation of the elastic airbag; a pressure plate is fixed on the end of the elastic airbag near the touch button; after the elastic airbag expands due to heat, it triggers the touch button based on the pressure plate, which can conduct the circuit of the alarm and make the alarm sound.

[0009] As a preferred embodiment of the present invention: a side fixing part is installed on both sides of the lower fixing frame, the side fixing part includes a fixing bracket, the fixing bracket slides on the inner wall of the lower fixing frame, a threaded cylinder is fixed on one side of the lower fixing frame, and an adjusting stud is threadedly connected inside the threaded cylinder, the adjusting stud is rotatably installed on one end of the fixing bracket.

[0010] As a preferred embodiment of the present invention: a suction cup bracket is installed on the top of the upper fixing frame, a suction cup is installed at one end of the suction cup bracket, and a balloon is connected to one end of the suction cup bracket after passing through the suction cup bracket, with the balloon communicating with the inside of the suction cup.

[0011] As a preferred embodiment of the present invention, the upper fixing frame is provided with multiple mounting slots, and one end of the suction cup bracket is detachably snapped into the mounting slot.

[0012] As a preferred embodiment of the present invention: a sliding cavity is provided on one side of the upper fixed frame, and a positioning slide is slidably installed in the sliding cavity. The positioning slide and the sliding cavity are connected by a positioning spring. A positioning post is fixed on the side of the positioning slide. The upper fixed frame and the mounting frame are provided with matching positioning holes, which are distributed circumferentially along the outer side of the sliding cavity.

[0013] As a preferred embodiment of the present invention: a mounting frame is provided on the outer side of the socket body, an adhesive tape is provided on the back of the mounting frame, a mounting cover is hinged to the mounting frame, wire holes are provided on the mounting frame and the mounting cover, and anti-slip pads are provided on the side of the mounting cover.

[0014] As a preferred embodiment of the present invention: the socket body is provided with a first positioning groove and a second positioning groove, a positioning support is fixed inside the mounting frame, and a positioning plug is movably mounted on one end of the positioning support by a spring. The positioning plug is adapted to the position of the first positioning groove, and based on the spring force, one end of the positioning plug is inserted into the first positioning groove; a protruding post is fixed to one end of the fixed bracket, and when the fixed bracket clamps the socket body, the protruding post is inserted into the second positioning groove.

[0015] The beneficial effects of this invention are as follows: 1. This invention, by setting up a mounting box, nozzle head, heat transfer components, and other structures, enables the heat transfer components to fit against the plug surface during use. In the event of abnormal heating or even fire, the heat transfer components can transfer heat to the heat transfer wire and heat transfer frame, and the heat transfer frame can heat the baffle. Since the baffle is made of a material that deforms when heated, the heated baffle deforms and loses its limiting effect on the sealing block. The sealing block is then forced open by pressure, and the fire extinguishing medium is sprayed from the mounting box to the plug, preventing the danger from spreading further.

[0016] 2. By setting up an upper fixing frame and a lower fixing frame, the present invention can clamp the socket body on the upper and lower sides to achieve a fixed effect, making installation convenient.

[0017] 3. This invention, by setting up an airbag chamber, an alarm, and other structures, can realize touch control of the touch button based on heat transfer and the expansion of the elastic airbag, and automatically sound an alarm using the alarm. The structure is simple and highly practical.

[0018] 4. By providing a side fixing part, the present invention can adjust the position of the adjusting stud on the threaded cylinder by turning the adjusting stud, and then use the fixing bracket to clamp it on both sides of the socket body to achieve reliable fixation.

[0019] 5. By setting up a positioning slide, positioning column and other structures, the positioning column can be pulled out when adjusting the angle. When the mounting frame is rotated for adjustment, the relative positions of the positioning holes on the mounting frame and the upper fixed frame change. Since the positioning holes are arranged in a circular pattern along the outer side of the slide cavity, after adjustment, the positioning holes on the mounting frame can still maintain the position matching with the positioning holes on the upper fixed frame. After adjustment, the positioning column is inserted into the positioning holes of the mounting frame and the upper fixed frame to fix the structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a smart safe electricity monitoring and alarm device proposed in this invention; Figure 2 This is a schematic diagram of the structure of the intelligent safe electricity monitoring and alarm device proposed in this invention with the mounting cover in the open state; Figure 3 This is a schematic diagram of the structure of a smart safe electricity monitoring and alarm device proposed in this invention, in which the upper fixing frame, lower fixing frame, and socket body are separated. Figure 4 This is a schematic diagram of the back of the mounting frame of the intelligent safe electricity monitoring and alarm device proposed in this invention; Figure 5 This is a cross-sectional structural diagram of the nozzle head of a smart safe electricity monitoring and alarm device proposed in this invention; Figure 6 This is a schematic diagram of the structure of a smart safe electricity monitoring and alarm device proposed in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the structure of a smart safe electricity monitoring and alarm device proposed in this invention.

[0021] In the diagram: 1-Mounting frame; 2-Anti-slip plate; 3-Mounting cover; 4-Suction cup; 5-Mounting bracket; 6-Upper fixing bracket; 7-Heat transfer wire; 8-Connecting column; 9-Lower fixing bracket; 10-Airbag chamber; 11-Socket body; 12-Mounting box; 13-Wire hole; 14-Clamping bracket; 15-Alarm; 16-Heat transfer plate; 17-Ball; 18-Mounting groove; 19-Suction cup bracket; 20-Nozzle head; 21-Locking screw; 22-Clamping spring; 23-Silicone strip; 24-Adhesive tape; 25-Fixing bracket; 26-Elastic airbag; 27-Touch button; 28-Adjusting stud; 29-Threaded cylinder; 30-Positioning slide; 31-Positioning column; 32-Positioning hole; 33-Positioning spring; 34-Stop; 35-Sealing plug; 36-Heat transfer frame; 37-Mesh plate; 38-Positioning plug; 39-Positioning support. Detailed Implementation

[0022] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] Example 1: A smart and safe electricity monitoring and alarm device, such as Figure 1-7As shown, the device includes a clamping assembly installed on the outside of the socket body 11. An adjustable mounting bracket 5 is mounted on the clamping assembly, and a mounting box 12 is mounted on the mounting bracket 5. The mounting box 12 is filled with compressed extinguishing media, such as dry powder or carbon dioxide. A nozzle head 20 is provided on the side of the mounting box 12 near the socket body 11. The nozzle head 20 has a central chamber and a side chamber. The central chamber communicates with the interior of the mounting box 12. The sealing plug 35 has an inverted trapezoidal structure. A stop block 34 is installed in the side chamber. One end of the stop block 34 has a wedge-shaped structure adapted to the sealing plug 35. One end of the stop block 34 extends through the side chamber to one side of the sealing plug 35, thus limiting the sealing plug 35. The stop block 34 is made of a heat-deformable material, such as paraffin wax or a low-melting-point alloy. A heat transfer assembly is installed on the clamping assembly. The heat transfer assembly is connected to a heat transfer frame 36 via a heat transfer wire 7. The heat transfer frame 36 passes through the stop block 34 and is fixed in the side chamber. A mesh plate 37 is provided between the sealing plug 35 and the mounting box 12; By setting up structures such as the mounting box 12, nozzle head 20, and heat transfer components, the heat transfer components can be made to fit against the plug surface during use. In the event of abnormal heating or even fire, the heat transfer components can transfer heat to the heat transfer wire 7 and heat transfer frame 36, and the heat transfer frame 36 can be used to heat the baffle 34. Since the baffle 34 is made of a material that deforms when heated, the heated baffle 34 deforms and loses its limiting effect on the sealing plug 35. The sealing plug 35 is then forced open by pressure, and the fire extinguishing medium is sprayed from the mounting box 12 to the plug to prevent the danger from spreading further.

[0025] In order to better transfer heat; such as Figure 3 As shown, the heat transfer assembly includes a clamping frame 14, which is slidably mounted on the clamping assembly. The clamping frame 14 and the clamping assembly are connected by a clamping spring 22. A heat transfer plate 16 is fixed to one end of the clamping frame 14, and a silicone strip 23 is fixed to the side of the clamping frame 14 near the socket body 11. During use, the heat transfer plate 16 can be tightly attached to the side wall of the plug or other surfaces to be tested by the force of the clamping spring 22.

[0026] In order to better secure it to the outside of the socket body 11; such as Figure 3 As shown, the clamping assembly includes an upper fixing frame 6 and a lower fixing frame 9. Both the upper fixing frame 6 and the lower fixing frame 9 have a U-shaped structure. Connecting posts 8 are fixed at both ends of the upper fixing frame 6. The lower fixing frame 9 is slidably connected to the outer wall of the connecting posts 8. The connecting posts 8 pass through the lower fixing frame 9 and are connected by a locking screw 21 for fixing the lower fixing frame 9 through a thread. Anti-slip pads are provided on the side of the upper fixing frame 6 and the lower fixing frame 9 near the socket body 11. The clamping frame 14 is slidably installed on the lower fixing frame 9. By setting the upper fixing bracket 6 and the lower fixing bracket 9, the upper fixing bracket 6 and the lower fixing bracket 9 can be used to clamp the socket body 11 on the upper and lower sides to achieve a fixed effect, making installation convenient.

[0027] For ease of alarm activation; such as Figure 5 As shown, an airbag chamber 10 is installed on the lower fixed frame 9, and an alarm 15 is installed inside the airbag chamber 10. A heat transfer pad is fixed on the top of the alarm 15, and the heat transfer pad is connected to the heat transfer plate 16 through a heat-conducting wire. A touch button 27 is installed on the inner wall of the end of the airbag chamber 10 away from the heat transfer pad, and the alarm 15 is installed at the end of the airbag chamber 10. The outer side of the elastic airbag 26 is provided with annular pleats that facilitate the deformation of the elastic airbag 26. A pressure plate is fixed on the end of the elastic airbag 26 near the touch button 27. After the elastic airbag 26 expands due to heat, it triggers the touch button 27 based on the pressure plate, which can conduct the circuit of the alarm 15 and make the alarm 15 sound an alarm. By setting up structures such as the airbag chamber 10 and the alarm 15, the touch button 27 can be controlled by the expansion of the elastic airbag 26 based on heat transfer, and the alarm 15 can be used to automatically sound an alarm. The structure is simple and highly practical.

[0028] To improve the clamping and fixing effect; such as Figure 3 , Figure 5 As shown, a side fixing part is installed on both sides of the lower fixing frame 9. The side fixing part includes a fixing bracket 25. The fixing bracket 25 slides on the inner wall of the lower fixing frame 9. A threaded cylinder 29 is fixed on one side of the lower fixing frame 9. An adjusting stud 28 is connected to the threaded cylinder 29 by a thread. The adjusting stud 28 is rotatably installed on one end of the fixing bracket 25. By setting the side fixing part, the position of the adjusting stud 28 on the threaded cylinder 29 can be adjusted by turning the adjusting stud 28, and then the fixing bracket 25 can be used to clamp it on both sides of the socket body 11 to achieve reliable fixation.

[0029] In order to achieve better fixation; such as Figure 3 As shown, a suction cup bracket 19 is installed on the top of the upper fixing frame 6. A suction cup 4 is installed at one end of the suction cup bracket 19. One end of the suction cup 4 passes through the suction cup bracket 19 and is connected to a balloon 17. The balloon 17 communicates with the inside of the suction cup 4.

[0030] For ease of flexible fixing; such as Figure 3 As shown, the upper fixing frame 6 has multiple mounting slots 18, and one end of the suction cup bracket 19 is detachably snapped into the mounting slot 18.

[0031] To facilitate adjustment of the angle of mounting bracket 5; such as Figure 5As shown, a sliding cavity is provided on one side of the upper fixed frame 6, and a positioning slide 30 is slidably installed in the sliding cavity. The positioning slide 30 and the sliding cavity are connected by a positioning spring 33. A positioning post 31 is fixed on the side of the positioning slide 30. The upper fixed frame 6 and the mounting frame 5 are provided with matching positioning holes 32, and the positioning holes 32 are arranged in a circular pattern along the outer side of the sliding cavity. By setting up structures such as positioning slide 30 and positioning column 31, the positioning column 31 can be pulled out when adjusting the angle. When the mounting frame 5 is rotated for adjustment, the relative positions of the positioning holes 32 on the mounting frame 5 and the upper fixed frame 6 change. Since the positioning holes 32 are arranged in a circular pattern along the outer side of the slide cavity, after adjustment, the positioning holes 32 on the mounting frame 5 can still maintain their positions in conjunction with the positioning holes 32 on the upper fixed frame 6. After adjustment, the positioning column 31 is inserted into the positioning holes 32 on the mounting frame 5 and the upper fixed frame 6 to fix the structure.

[0032] To improve aesthetics and safety; such as Figure 2 , Figure 4 As shown, a mounting frame 1 is provided on the outer side of the socket body 11, an adhesive tape 24 is provided on the back of the mounting frame 1, a mounting cover 3 is hinged on the mounting frame 1, wire holes 13 are provided on the mounting frame 1 and the mounting cover 3, and anti-slip pads 2 are provided on the side of the mounting cover 3.

[0033] Example 2: A smart and safe electricity monitoring and alarm device, such as Figure 7 As shown, in order to improve the fixing effect, this embodiment makes the following improvements based on embodiment 1: The socket body 11 is provided with a first positioning groove and a second positioning groove. A positioning support 39 is fixed inside the mounting frame 1. A positioning plug 38 is movably installed at one end of the positioning support 39 by a spring. The positioning plug 38 is adapted to the position of the first positioning groove. Based on the spring force, one end of the positioning plug 38 is inserted into the first positioning groove. A protruding post is fixed at one end of the fixing bracket 25. When the fixing bracket 25 clamps the socket body 11, the protruding post is inserted into the second positioning groove. Compared to Embodiment 1, the socket body 11 of this solution is specifically designed, that is, a first positioning groove and a second positioning groove are provided on the outside of the ordinary socket body, so that the mounting frame 1, the upper fixing bracket 6, and the lower fixing bracket 9 can be better fixed to the outside of the socket body 11, thereby improving reliability.

[0034] For the parts not disclosed in detail in this invention, such as necessary control modules, specific control methods, signal transmission methods, power supply methods, etc., those skilled in the art can ensure the smooth implementation of the solution of this invention based on common sense, normal thinking logic and existing technology.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A smart and safe electricity monitoring and alarm device, characterized in that, The device includes a clamping assembly installed on the outside of the socket body (11). An adjustable mounting bracket (5) is mounted on the clamping assembly. An mounting box (12) is mounted on the mounting bracket (5). The mounting box (12) is filled with compressed extinguishing medium. A nozzle head (20) is provided on the side of the mounting box (12) closest to the socket body (11). The nozzle head (20) has a central chamber and a side chamber. The central chamber communicates with the interior of the mounting box (12). The sealing plug (35) has an inverted trapezoidal structure. A stop block (34) is installed in the side cavity. One end of the stop block (34) is a wedge-shaped structure that matches the sealing plug (35). One end of the stop block (34) extends through the side cavity to one side of the sealing plug (35) to limit the sealing plug (35). The stop block (34) is made of a material that deforms when heated. A heat transfer component is installed on the clamping assembly. The heat transfer component is connected to a heat transfer frame (36) through a heat transfer wire (7). The heat transfer frame (36) passes through the stop block (34) and is fixed in the side cavity.

2. The intelligent safe electricity monitoring and alarm device according to claim 1, characterized in that, The heat transfer assembly includes a clamping frame (14), which is slidably mounted on the clamping assembly. The clamping frame (14) and the clamping assembly are connected by a clamping spring (22). A heat transfer plate (16) is fixed to one end of the clamping frame (14), and a silicone strip (23) is fixed to the side of the clamping frame (14) near the socket body (11).

3. The intelligent safe electricity monitoring and alarm device according to claim 2, characterized in that, The clamping assembly includes an upper fixing frame (6) and a lower fixing frame (9). Both the upper fixing frame (6) and the lower fixing frame (9) are of the shape of a U-shape. The two ends of the upper fixing frame (6) are fixed with connecting columns (8). The lower fixing frame (9) is slidably connected to the outer wall of the connecting column (8). The connecting column (8) passes through the lower fixing frame (9) and is connected by a locking screw (21) for fixing the lower fixing frame (9) by a thread. Anti-slip pads are provided on the side of the upper fixing frame (6) and the lower fixing frame (9) near the socket body (11). The clamping frame (14) is slidably installed on the lower fixing frame (9).

4. The intelligent safe electricity monitoring and alarm device according to claim 3, characterized in that, An airbag chamber (10) is installed on the lower fixed frame (9). An alarm (15) is installed inside the airbag chamber (10). A heat transfer pad is fixed on the top of the alarm (15). The heat transfer pad is connected to the heat transfer plate (16) through a heat-conducting wire. A touch button (27) is installed on the inner wall of the end of the airbag chamber (10) away from the heat transfer pad. An alarm (15) is installed at the end of the airbag chamber (10). An annular fold is provided on the outer side of the elastic airbag (26) to facilitate the deformation of the elastic airbag (26). A pressure plate is fixed on the end of the elastic airbag (26) near the touch button (27). After the elastic airbag (26) expands due to heat, it triggers the touch button (27) based on the pressure plate, which can conduct the circuit of the alarm (15) and make the alarm (15) sound an alarm.

5. The intelligent safe electricity monitoring and alarm device according to claim 4, characterized in that, The lower fixing frame (9) has a side fixing part installed on both sides. The side fixing part includes a fixing bracket (25). The fixing bracket (25) slides on the inner wall of the lower fixing frame (9). A threaded cylinder (29) is fixed on one side of the lower fixing frame (9). An adjusting stud (28) is connected to the threaded cylinder (29) by a thread. The adjusting stud (28) is rotatably installed on one end of the fixing bracket (25).

6. The intelligent safe electricity monitoring and alarm device according to claim 5, characterized in that, The upper fixing frame (6) is equipped with a suction cup bracket (19) on top. A suction cup (4) is installed at one end of the suction cup bracket (19). One end of the suction cup (4) passes through the suction cup bracket (19) and is connected to a balloon (17). The balloon (17) communicates with the inside of the suction cup (4).

7. The intelligent safe electricity monitoring and alarm device according to claim 6, characterized in that, The upper fixing frame (6) has multiple mounting slots (18), and one end of the suction cup bracket (19) is detachably snapped into the mounting slot (18).

8. The intelligent safe electricity monitoring and alarm device according to claim 7, characterized in that, A sliding cavity is provided on one side of the upper fixed frame (6), and a positioning slide (30) is slidably installed in the sliding cavity. The positioning slide (30) and the sliding cavity are connected by a positioning spring (33). A positioning column (31) is fixed on the side of the positioning slide (30). The upper fixed frame (6) and the mounting frame (5) are provided with matching positioning holes (32). The positioning holes (32) are arranged in a circular pattern along the outer side of the sliding cavity.

9. The intelligent safe electricity monitoring and alarm device according to claim 5, characterized in that, The socket body (11) has an installation frame (1) on its outer side, an adhesive tape (24) on the back of the installation frame (1), an installation cover (3) hinged on the installation frame (1), wire holes (13) on the installation frame (1) and the installation cover (3), and anti-slip pads (2) on the side of the installation cover (3).

10. A smart safe electricity monitoring and alarm device according to claim 9, characterized in that, The socket body (11) is provided with a first positioning groove and a second positioning groove. A positioning support (39) is fixed inside the mounting frame (1). A positioning plug (38) is movably installed on one end of the positioning support (39) through a spring. The positioning plug (38) is adapted to the position of the first positioning groove. Based on the spring force, one end of the positioning plug (38) is inserted into the first positioning groove. A protruding post is fixed on one end of the fixed bracket (25). When the fixed bracket (25) clamps the socket body (11), the protruding post is inserted into the second positioning groove.

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