Withstand voltage relay

Abstract

The utility model discloses a voltage-withstanding relay. The voltage-withstanding relay comprises a relay body, an insulator, a shell and a terminal, the relay body is provided with a base body and pins, and the pins comprise at least two signal pins and at least two load pins; each pin extends downwards from the base body along the Z-axis direction; the insulator wraps the relay body. The shell accommodates the insulator; the terminals comprise signal terminals which are arranged corresponding to the signal pins and are correspondingly and electrically connected with the signal pins and load terminals which are arranged corresponding to the load pins and are correspondingly and electrically connected with the load pins; each terminal extends along the Z-axis direction and downwards extends out of the insulator, and except the part, downwards extending out of the insulator, of each terminal, the rest part is wrapped by the insulator; the distance between any two load terminals is larger than the distance between two corresponding load pins, and the distance between any load terminal and any signal terminal is larger than the distance between the corresponding load pin and the corresponding signal pin. By adopting the scheme, compared with a relay in the prior art, the voltage-withstanding relay has better insulating performance.

Description

Technical Field

[0001] The present application relates to the field of relays, and in particular to a withstand voltage relay. Background Art

[0002] In the prior art, a relay includes a substrate and pins. The pins include at least two signal pins and at least two load pins. Each signal pin is used to introduce an input electrical signal, and each load pin is used to connect an external load circuit. The substrate is generally provided with a magnetic circuit portion and a contact portion. The magnetic circuit portion controls the connection or disconnection of the external load circuit according to the input electrical signal, and turns the external circuit on or off through each load pin. In a configuration of a relay, each pin extends downward from the substrate along the Z-axis direction. In some specific high-voltage application scenarios, the voltage withstand potential of the entire relay cannot be fully utilized. Utility Model Content

[0003] The purpose of the present application is to overcome the above-mentioned defects or problems existing in the background technology and to provide a withstand voltage relay which has better insulation performance than the relays in the prior art.

[0004] In order to achieve the above purpose, the following technical solutions are adopted:

[0005] The first technical scheme relates to a voltage-resistant relay, which includes at least one relay body, the relay body is provided with a substrate and pins, the pins include at least two signal pins and at least two load pins; each pin extends out of the substrate along the Z-axis direction; the voltage-resistant relay also includes: an insulator, which wraps the relay body; a shell, which accommodates the insulator; and terminals, which include signal terminals corresponding to and electrically connected to the signal pins and load terminals corresponding to and electrically connected to the load pins; each terminal extends out of the insulator along the Z-axis direction, and except for the part of each terminal extending downward from the insulator, the rest of the terminal is wrapped by the insulator; the spacing between any load terminal and any signal terminal is greater than the spacing between the corresponding load pin and the corresponding signal pin.

[0006] The second technical solution is based on the first technical solution, wherein the distance between any two load terminals is greater than the distance between the corresponding two load pins.

[0007] The third technical solution is based on the second technical solution, wherein the signal terminal is electrically connected to the corresponding signal pin through a signal connecting part; the load terminal is electrically connected to the corresponding load pin through a load connecting part; and the signal connecting part and the load connecting part are both wrapped by an insulator.

[0008] The fourth technical solution is based on the third technical solution, wherein the extension direction of the signal connection portion is perpendicular to the Z-axis direction, and the extension direction of the load connection portion is perpendicular to the Z-axis direction.

[0009] The fifth technical solution is based on the fourth technical solution, which also includes a circuit board, the circuit board, the signal connection part and the load connection part are wrapped by an insulator, and the signal connection part and the load connection part are formed on the circuit board; the circuit board is provided with connection points, and the connection points include signal pin connection points, signal terminal connection points, load pin connection points and load terminal connection points; the signal pin connection points are correspondingly arranged with the signal pins along the Z-axis direction and are correspondingly electrically connected; the signal terminal connection points are correspondingly arranged with the signal terminals along the Z-axis direction and are correspondingly electrically connected; the load pin connection points are correspondingly arranged with the load pins along the Z-axis direction and are correspondingly electrically connected; the load terminal connection points are correspondingly arranged with the load terminals along the Z-axis direction and are correspondingly electrically connected; each signal terminal connection point is electrically connected to the corresponding signal pin connection point through the corresponding signal connection part; each load terminal connection point is electrically connected to the corresponding load pin connection point through the corresponding load connection part.

[0010] The sixth technical solution is based on the fifth technical solution, wherein the circuit board is provided with at least one through slot, each of the through slots passes through the circuit board along the Z-axis direction, and each of the through slots is configured to straddle a virtual straight line segment between any signal pin connection point and the nearest load pin connection point; each of the through slots is also configured to straddle a virtual straight line segment between any load pin connection point and the nearest other load pin connection point.

[0011] The seventh technical solution is based on the sixth technical solution, wherein each of the through slots is configured to span a virtual straight line segment between any signal pin connection point and any load pin connection point; each of the through slots is also configured to span a virtual straight line segment between any load pin connection point and any other load pin connection point.

[0012] The eighth technical scheme is based on the sixth or seventh technical scheme, wherein each signal pin connection point is arranged along the Y-axis direction, each signal terminal connection point is arranged along the Y-axis direction, each load pin connection point is arranged along the Y-axis direction, and each load terminal connection point is arranged along the Y-axis direction; each signal pin connection point and each load pin connection point are arranged along the X-axis direction, each signal terminal connection point is farther away from each load pin connection point along the X-axis direction than each signal pin connection point, and each load terminal connection point is farther away from each signal pin connection point along the X-axis direction than each load pin connection point.

[0013] The ninth technical solution is based on the eighth technical solution, wherein the through groove includes at least one first through groove and at least one second through groove; the first through groove is located between each signal pin connection point and each load pin connection point along the X-axis direction; the second through groove is at least partially located between two adjacent load pin connection points along the Y-axis direction.

[0014] The tenth technical solution is based on the ninth technical solution, wherein the second through groove is provided with a notch on the outer edge of the circuit board, and the notch is located at one end of the circuit board away from each signal terminal connection point along the X-axis direction; the second through groove is provided with a first groove section and a second groove section, the first groove section is located between two adjacent load pin connection points along the Y-axis direction, and the second groove section is connected with the first groove section along the X-axis direction and is farther away from the notch than the first groove section; the maximum dimension of the second groove section along the Y-axis direction is greater than the spacing between two adjacent load pin connection points.

[0015] The eleventh technical solution is based on the sixth or seventh technical solution, wherein the insulator is formed by solidifying insulating glue; the circuit board is provided with at least one glue injection port, and the glue injection port penetrates the circuit board along the Z-axis direction.

[0016] The twelfth technical solution is based on the eighth technical solution, wherein the outer shell is provided with an abutment surface extending downward along the Z-axis direction and a positioning portion protruding downward from the abutment surface along the Z-axis direction; the circuit board is provided with a positioning groove corresponding to each of the positioning portions; the positioning portion is suitable for extending into the corresponding positioning groove along the Z-axis direction so that the abutment surface abuts against the circuit board along the Z-axis direction.

[0017] The thirteenth technical solution is based on the twelfth technical solution, wherein the abutting surface is formed on a protrusion of the shell, and the number of the protrusions is three.

[0018] The fourteenth technical solution is based on the twelfth technical solution, wherein the housing is provided with an indicating portion, which is suitable for indicating the side where the signal terminal is located along the X-axis direction; the positioning portion is configured to be able to extend into the positioning groove only when the signal terminal connection point is located on the same side as the indicating portion along the X-axis direction.

[0019] Compared with the prior art, the above solution has the following beneficial effects:

[0020] The applicant has found through observation, experimentation and research that, in high-voltage application scenarios, the reason why the voltage-withstanding potential of the entire relay cannot be fully utilized is that the insulation performance of each pin is not as good as the insulation performance of the substrate. Specifically, the load pins may be short-circuited by creeping electricity from the substrate surface or by breaking through the air, and the load pins and signal pins may fail by creeping electricity from the substrate surface or by breaking through the air, causing the relay control to fail or malfunction.

[0021] In the first technical solution, the relay body and the parts of the terminals that do not extend out of the insulator are wrapped by an insulator with low conductivity, that is, physical isolation is provided for each pin and each terminal in the housing. Therefore, it is less likely to creep between the load pins and between the load pins and the signal pins, and short circuits or failures cannot occur by breaking through the air. Therefore, compared with the existing technology, the insulation performance is effectively improved, and the withstand voltage potential of the withstand voltage relay can be fully utilized.

[0022] In the first technical solution, the distance between any load terminal and any signal terminal is greater than the distance between the corresponding load pin and the corresponding signal pin, and the distance between the load terminal and the signal terminal extending out of the insulator is also greater, which is not only less likely to cause failure due to air breakdown, but also less likely to cause failure due to creepage on the surface of the insulator because the creepage distance between the load terminal and the signal terminal on the surface of the insulator is increased. Therefore, compared with the prior art, the insulation performance between the load terminal and the signal terminal is effectively improved, the risk of signal terminal breakdown is effectively reduced, and the withstand voltage potential of the withstand voltage relay can be fully utilized.

[0023] In the second technical solution, the distance between any two load terminals is greater than the distance between the corresponding two load pins, and the distance between the two load terminals extending out of the insulator is larger, which is not only less likely to cause a short circuit due to air breakdown, but also less likely to cause a short circuit due to creepage on the surface of the insulator because the creepage distance between the two load terminals on the surface of the insulator is increased. Therefore, compared with the existing technology, the insulation performance between the load terminals is effectively improved, and the withstand voltage potential of the withstand voltage relay can be fully utilized.

[0024] The third technical solution and the fourth technical solution are specific implementation methods of the second technical solution.

[0025] In the fifth technical solution, the signal connection part and the load connection part are formed on the circuit board, so that the relay body and each terminal can be more easily positioned in space, and each pin can be more easily electrically connected to the corresponding terminal. Therefore, the entire withstand voltage relay is easier to assemble.

[0026] In the sixth technical solution, each through slot is configured to span a virtual straight line segment between any signal pin connection point and the nearest load pin connection point, thereby increasing the creepage distance between any signal pin connection point and the nearest load pin connection point on the circuit board body, making it less likely for creepage between the signal pin connection point and the load pin connection point through the circuit board body, thereby improving the voltage resistance of the entire voltage-resistant relay.

[0027] In the sixth technical solution, each through slot is also configured to span a virtual straight line segment between any load pin connection point and the nearest other load pin connection point, so that the creepage distance between any load pin connection point and the nearest other load pin connection point on the circuit board body is further increased, and adjacent load pin connection points are less likely to creep through the circuit board body, thereby improving the voltage resistance of the entire voltage-resistant relay.

[0028] In the seventh technical solution, each through slot is arranged across a virtual straight line segment between any signal pin connection point and any load pin connection point, so that the creepage distance between any signal pin connection point and each load pin connection point on the circuit board body is increased. Compared with the fifth technical solution, it is less likely for creepage through the circuit board body between the signal pin connection point and the load pin connection point, thereby improving the voltage resistance of the entire voltage-resistant relay.

[0029] In the seventh technical solution, each through slot is arranged between any two load pin connection points, so that the creepage distance of any two load pin connection points on the circuit board body is increased. Compared with the sixth technical solution, it is less likely for creepage through the circuit board body between the two load pin connection points, thereby improving the voltage resistance of the entire voltage-resistant relay.

[0030] The eighth technical scheme provides a preferred implementation of the sixth or seventh technical scheme, combined with the technical means in the second technical scheme that the distance between any two load terminals is greater than the distance between the corresponding two load pins, and the distance between any load terminal and any signal terminal is greater than the distance between the corresponding load pin and the corresponding signal pin, and fully utilizes the two-dimensional space size of the circuit board. By arranging each connection point in the X-axis direction and the Y-axis direction, the distance between the load terminal and the signal terminal in the X-axis direction is enlarged, and at the same time, the distance between each load terminal in the Y-axis direction is enlarged.

[0031] In the ninth technical solution, the first through-slot is located between each signal pin connection point and each load pin connection point along the X-axis direction, and in combination with the seventh technical solution, a specific implementation method of increasing the creepage distance between each signal pin connection point and each load pin connection point on the circuit board body is provided. The second through-slot is at least partially located between two adjacent load pin connection points along the Y-axis direction, and in combination with the eighth technical solution, a specific implementation method of increasing the creepage distance between each load pin connection point on the circuit board body is provided.

[0032] In the tenth technical solution, the second through slot is provided with a notch at one end of the circuit board away from each signal terminal connection point, so that possible creepage of each load pin connection point can only occur on the side away from the notch.

[0033] In the tenth technical solution, the second slot section is connected to the first slot section and is away from the slot opening. The maximum dimension of the second slot section along the Y-axis direction is greater than the spacing between the connection points of two adjacent load pins. Therefore, the creepage distance of the two adjacent load pins on the circuit board body is further increased, thereby improving the voltage resistance of the entire voltage-resistant relay.

[0034] In the eleventh technical solution, by providing at least one glue injection port on the circuit board, the insulating glue is easier to fill into the housing, especially easier to wrap the relay body and the circuit board. More importantly, by injecting glue through the glue injection port and providing a through groove on the circuit board, it is possible to ensure that the gas is discharged from the inside of the housing, thereby preventing the insulating glue from being unable to be filled due to the inability to discharge gas, thereby affecting the insulation performance.

[0035] In the twelfth technical solution, the positioning of the circuit board in the X-axis direction and the Y-axis direction can be ensured by the cooperation between the positioning part on the shell and the positioning groove on the circuit board. The positioning of the circuit board in the Z-axis direction can be ensured by the abutting surface on the shell abutting the circuit board, and the circuit board can be supported by the shell before the glue is poured, so as to form an upper glue injection cavity above the circuit board.

[0036] In the thirteenth technical solution, the abutting surface is formed on a protrusion of the housing, and the number of the protrusions is three, which can not only save the material of the housing, but also effectively position and support the circuit board through three-point support.

[0037] In the fourteenth technical solution, an indicator is provided on the housing to indicate the side where the signal terminal is located along the X-axis direction, thereby avoiding wrong connection during use. The foolproof design of the positioning part ensures that the signal terminal and the indicator are on the same side, thereby avoiding assembly errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solution of the embodiment, the following briefly introduces the drawings required for use:

[0039] Figure 1 is a top view of a withstand voltage relay in an embodiment;

[0040] Figure 2 for Figure 1 AA section view;

[0041] Figure 3 It is a top view of the withstand voltage relay in the embodiment with the insulator hidden;

[0042] Figure 4 for Figure 3 BB section view;

[0043] Figure 5 for Figure 3 CC section view;

[0044] Figure 6 for Figure 3 DD section view;

[0045] Figure 7 A top view of the circuit board in the embodiment Figure 1 ;

[0046] Figure 8A top view of a circuit board in an embodiment Figure 2 ;

[0047] Fig. 9 It is a three-dimensional view of the housing in the embodiment after being inverted.

[0048] Description of main reference numerals:

[0049] 1. Withstand voltage relay; 2. Relay body; 3. Terminal; 4. Circuit board; 5. Insulator; 6. Housing; 7. Base; 8. Pin; 9. Signal pin; 10. Load pin; 11. Signal terminal; 12. Load terminal; 13. Connection point; 14. Signal connection part; 15. Load connection part; 16. Through slot; 17. Glue injection port; 18. Positioning slot; 19. Signal pin connection point; 20. Signal terminal connection point; 21. Load pin connection point; 22. Load terminal connection point; 23. First signal pin connection point; 24. Second signal pin connection point; 25. First signal terminal connection point; 26. Second signal terminal connection point; 27. First load pin connection point; 28. Second load pin connection point; 29. ​​First load terminal connection point; 30. Second load terminal connection point point; 31, first signal connection part; 32, second signal connection part; 33, first load connection part; 34, second load connection part; 35, first through slot; 36, second through slot; 37, first virtual straight line segment; 38, second virtual straight line segment; 39, third virtual straight line segment; 40, fourth virtual straight line segment; 41, notch; 42, first slot segment; 43, second slot segment; 44, third slot segment; 45, fifth virtual straight line segment; 46, first glue injection port; 47, second glue injection port; 48, third glue injection port; 49, first positioning groove; 50, second positioning groove; 51, third positioning groove; 52, indication part; 53, protrusion; 54, abutment surface; 55, positioning part; 56, first positioning part; 57, second positioning part; 58, third positioning part; 59, upper glue injection cavity; 60, lower glue injection cavity. DETAILED DESCRIPTION

[0050] In the claims and the description, unless otherwise defined, the terms "first", "second" or "third", etc. are intended to distinguish different objects rather than to describe a specific order.

[0051] In the claims and the specification, unless otherwise defined, terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings and are only for the convenience of simplifying the description and do not imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction.

[0052] In the claims and the specification, unless otherwise defined, the term "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method in which there is no displacement relationship and relative rotation relationship between the two parties, that is to say, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0053] In the claims and the description, unless otherwise defined, the terms "includes", "has" and their variations mean "including but not limited to".

[0054] In the claims and the specification, unless otherwise defined, the term "provided with" means that the technical feature located thereafter is a part of the technical feature located therefor.

[0055] In the claims and description, unless otherwise defined, the term "insulator" refers to a material having an electrical conductivity less than that of air.

[0056] In the claims and description, unless otherwise defined, the term "each through groove is configured to straddle...a virtual straight line segment" means that the projection of any one or more through grooves on a projection plane perpendicular to the Z-axis direction is penetrated by the projection of the virtual straight line segment on the projection plane.

[0057] In the claims and the specification, unless otherwise defined, the term “the nearest load pin connection point” refers to the load pin connection point that is closest to a signal pin connection point.

[0058] In the claims and description, unless otherwise defined, the term "nearest other load pin connection point" refers to other load pin connection points that are closest to a certain load pin connection point.

[0059] In the claims and description, unless otherwise defined, the term "each signal pin connection point and each load pin connection point are arranged along the X-axis direction" means that each signal pin connection point forms a signal pin connection point group, each load pin connection point forms a load pin connection point group, and the signal pin connection point group and the load pin connection point group are arranged along the X-axis direction.

[0060] In the claims and the specification, unless otherwise defined, the term "glue injection port" can be used for injecting insulating glue into the glue injection port, and can also be used for exhausting gas during the process of injecting insulating glue.

[0061] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the accompanying drawings.

[0062] See also Figure 1 and Figure 2 , Figure 1 and Figure 2 FIG. 1 shows a withstand voltage relay 1 in this embodiment. Figure 2As shown, the withstand voltage relay 1 includes a relay body 2 , terminals 3 , a circuit board 4 , an insulator 5 and a housing 6 .

[0063] See also Figures 3 to 6 , Figures 3 to 6 FIG. 2 shows the relay body 2 in this embodiment. Figure 4 As shown, in this embodiment, the relay body 2 includes a substrate 7 and pins 8. The substrate 7 is provided with a magnetic circuit portion and a contact portion, and the magnetic circuit portion controls the contact portion to close or open according to an input electrical signal. The pins 8 include at least two signal pins 9 and at least two load pins 10. Each signal pin 9 is electrically connected to the magnetic circuit portion and is used to introduce an input electrical signal into the magnetic circuit portion. Each load pin 10 is electrically connected to the contact portion and is used to control the connection or disconnection of an external load circuit by opening and closing the contact portion. Each pin 8 extends downward from the substrate 7 along the Z-axis direction to the circuit board 4. As shown in FIG. Figure 5 and Figure 6 As shown, in this embodiment, the number of pins 8 is four. Among them, the number of signal pins 9 is two, and the two signal pins 9 are arranged along the Y-axis direction; the number of load pins 10 is two, and the two load pins 10 are arranged along the Y-axis direction. Figure 4 As shown, two signal pins 9 and two load pins 10 are arranged along the X-axis direction.

[0064] See also Figures 3 to 6 , Figures 3 to 6 The terminal 3 in this embodiment is shown. Figure 4 As shown, in this embodiment, the terminal 3 includes a signal terminal 11 and a load terminal 12. The signal terminal 11 is correspondingly arranged and electrically connected to the signal pin 9. The load terminal 12 is correspondingly arranged and electrically connected to the load pin 10. Each terminal 3 extends along the Z-axis direction and passes through the circuit board 4. Figure 5 and Figure 6 As shown, in this embodiment, the number of terminals 3 is four. Among them, the number of signal terminals 11 corresponds to the number of signal pins 9, both of which are two, and the two signal terminals 11 are arranged along the Y-axis direction; the number of load terminals 12 corresponds to the number of load pins 10, both of which are two, and the two load terminals 12 are arranged along the Y-axis direction. Figure 4 As shown, the two signal terminals 11 and the two load terminals 12 are arranged along the X-axis direction.

[0065] See also Figure 7 and Figure 8 , Figure 7 and Figure 8 FIG. 4 shows a circuit board 4 in this embodiment. Figure 7 As shown, in this embodiment, the circuit board 4 is plate-shaped and perpendicular to the Z-axis direction. The circuit board 4 is provided with a connection point 13, a signal connection part 14, a load connection part 15, a through slot 16, a glue injection port 17 and a positioning slot 18.

[0066] like Figure 7 As shown, the connection point 13 includes a signal pin connection point 19, a signal terminal connection point 20, a load pin connection point 21 and a load terminal connection point 22. In this embodiment, the number of the signal pin connection points 19 is two, namely, a first signal pin connection point 23 and a second signal pin connection point 24. The two signal pin connection points 19 are arranged along the Y-axis direction. The two signal pin connection points 19 are arranged correspondingly with the two signal pins 9 along the Z-axis direction and are electrically connected by welding. In this embodiment, the number of the signal terminal connection points 20 is two, namely, a first signal terminal connection point 25 and a second signal terminal connection point 26. The two signal terminal connection points 20 are arranged along the Y-axis direction. The two signal terminal connection points 20 are arranged correspondingly with the two signal terminals 11 along the Z-axis direction and are electrically connected by welding. In this embodiment, the number of the load pin connection points 21 is two, namely, a first load pin connection point 27 and a second load pin connection point 28. The two load pin connection points 21 are arranged along the Y-axis direction. The two load pin connection points 21 are arranged correspondingly with the two load pins 10 along the Z-axis direction and are electrically connected by welding. In this embodiment, the number of load terminal connection points 22 is two, namely, a first load terminal connection point 29 and a second load terminal connection point 30. The two load terminal connection points 22 are arranged along the Y-axis direction. The two load terminal connection points 22 are arranged correspondingly with the two load terminals 12 along the Z-axis direction and are electrically connected by welding. In this embodiment, each signal pin connection point 19 and each load pin connection point 21 are arranged along the X-axis direction. Each signal terminal connection point 20 is farther away from each load pin connection point 21 along the X-axis direction than each signal pin connection point 19. Each load terminal connection point 22 is farther away from each signal pin connection point 19 along the X-axis direction than each load pin connection point 21. It can be seen from the above settings that the spacing between any load terminal 12 and any signal terminal 11 is greater than the spacing between the corresponding load pin 10 and the corresponding signal pin 9. In this embodiment, the distance between the two load terminal connection points 22 along the Y-axis direction is greater than the distance between the two load pin connection points 21 along the Y-axis direction. It can be seen from the above settings that the spacing between any two load terminals 12 is greater than the spacing between the corresponding two load pins 10.

[0067] like Figure 7As shown, the signal connection part 14 is used to electrically connect the signal terminal connection point 20 with the corresponding signal pin connection point 19. In this embodiment, the number of the signal connection parts 14 is two and they are formed on the circuit board 4 and extend perpendicular to the Z-axis direction. The two signal connection parts 14 are respectively a first signal connection part 31 and a second signal connection part 32. The first signal terminal connection point 25 is electrically connected to the first signal pin connection point 23 through the first signal connection part 31. The second signal terminal connection point 26 is electrically connected to the second signal pin connection point 24 through the second signal connection part 32. Thus, each signal pin 9 is electrically connected to the corresponding signal terminal 11 through the signal pin connection point 19, the signal connection part 14 and the signal terminal connection point 20.

[0068] like Figure 7 As shown, the load connection portion 15 is used to electrically connect the load terminal connection point 22 with the corresponding load pin connection point 21. In this embodiment, the number of the load connection portions 15 is two and they are formed on the circuit board 4 and extend perpendicular to the Z-axis direction. The two load connection portions 15 are respectively a first load connection portion 33 and a second load connection portion 34. The first load terminal connection point 29 is electrically connected to the first load pin connection point 27 through the first load connection portion 33. The second load terminal connection point 30 is electrically connected to the second load pin connection point 28 through the second load connection portion 34. Thus, each load pin 10 is electrically connected to the corresponding load terminal 12 through the load pin connection point 21, the load connection portion 15 and the load terminal connection point 22.

[0069] There is at least one through slot 16, and each through slot 16 penetrates the circuit board 4 along the Z-axis direction. Each through slot 16 is configured to span a virtual straight line segment between any signal pin connection point 19 and the nearest load pin connection point 21; each through slot 16 is also configured to span a virtual straight line segment between any load pin connection point 21 and the nearest other load pin connection point 21. In this embodiment, each through slot 16 is configured to span a virtual straight line segment between any signal pin connection point 19 and any load pin connection point 21; each through slot 16 is also configured to span a virtual straight line segment between any load pin connection point 21 and any other load pin connection point 21. The above-mentioned "each through slot 16 is configured to span ... a virtual straight line segment" means that the projection of any one or more through slots 16 on a projection plane perpendicular to the Z-axis direction is penetrated by the projection of the virtual straight line segment on the projection plane.

[0070] like Figure 7 As shown, in this embodiment, there are two through slots 16. The two through slots 16 are respectively a first through slot 35 and a second through slot 36. The first through slot 35 is located between each signal pin connection point 19 and each load pin connection point 21 along the X-axis direction.

[0071] like Figure 8 As shown, the first through slot 35 is arranged across the first virtual straight line segment 37 between the first signal pin connection point 23 and the first load pin connection point 27, wherein the first load pin connection point 27 is the load pin connection point 21 closest to the first signal pin connection point 23; the first through slot 35 is also arranged across the second virtual straight line segment 38 between the first signal pin connection point 23 and the second load pin connection point 28; the first through slot 35 is also arranged across the third virtual straight line segment 39 between the second signal pin connection point 24 and the second load pin connection point 28, wherein the second load pin connection point 28 is the load pin connection point 21 closest to the second signal pin connection point 24; the first through slot 35 is also arranged across the fourth virtual straight line segment 40 between the second signal pin connection point 24 and the first load pin connection point 27.

[0072] like Figure 7 As shown, the second through slot 36 is at least partially located between two adjacent load pin connection points 21 along the Y-axis direction. The second through slot 36 is provided with a notch 41, a first slot section 42, a second slot section 43 and a third slot section 44. The notch 41 is located at the outer edge of the circuit board 4; specifically, the notch 41 is located at one end of the circuit board 4 away from each signal terminal connection point 20 along the X-axis direction. The first slot section 42 is located between two adjacent load pin connection points 21 along the Y-axis direction. The second slot section 43 is connected with the first slot section 42 along the X-axis direction and is further away from the notch 41 than the first slot section 42, and the maximum dimension of the second slot section 43 along the Y-axis direction is greater than the spacing between two adjacent load pin connection points 21. The third slot section 44 is connected with the first slot section 42 and the notch 41 along the X-axis direction, respectively.

[0073] like Figure 8 As shown, the second through slot 36 is arranged across the first virtual straight line segment 37 between the first signal pin connection point 23 and the first load pin connection point 27; the second through slot 36 is also arranged across the second virtual straight line segment 38 between the first signal pin connection point 23 and the second load pin connection point 28; the second through slot 36 is also arranged across the third virtual straight line segment 39 between the second signal pin connection point 24 and the second load pin connection point 28; the second through slot 36 is also arranged across the fourth virtual straight line segment 40 between the second signal pin connection point 24 and the first load pin connection point 27; the second through slot 36 is also arranged across the fifth virtual straight line segment 45 between the first load pin connection point 27 and the second load pin connection point 28.

[0074] like Figure 7As shown, the glue injection port 17 penetrates the circuit board 4 along the Z-axis direction and is used to inject the insulating glue, and can also be used to exhaust during the injection of the insulating glue. In this embodiment, the number of the glue injection ports 17 is three, and the three glue injection ports 17 are respectively the first glue injection port 46, the second glue injection port 47 and the third glue injection port 48. Specifically, the first glue injection port 46 is opened at the left side of the circuit board 4 along the X-axis direction and is located at the front edge of the circuit board 4 along the Y-axis direction; the second glue injection port 47 is opened at the left end of the circuit board 4 along the X-axis direction and is located at the rear edge of the circuit board 4 along the Y-axis direction; the third glue injection port 48 is opened at the left end of the circuit board 4 along the X-axis direction and is located at the front edge of the circuit board 4 along the Y-axis direction.

[0075] like Figure 7 As shown, the positioning groove 18 penetrates the circuit board 4 along the Z-axis direction. There are three positioning grooves 18, which are respectively a first positioning groove 49, a second positioning groove 50 and a third positioning groove 51. Specifically, the first positioning groove 49 is opened at the left end of the circuit board 4 along the X-axis direction and is located in the middle of the circuit board 4 along the Y-axis direction; the second positioning groove 50 is opened at the right side of the circuit board 4 along the X-axis direction and is located at the rear edge of the circuit board 4 along the Y-axis direction; the third positioning groove 51 is opened at the right side of the circuit board 4 along the X-axis direction and is located at the front edge of the circuit board 4 along the Y-axis direction.

[0076] See also Figure 2 , Figure 2 FIG. 5 shows the insulator 5 in this embodiment. Figure 2 As shown, in this embodiment, the insulator 5 is accommodated in the housing 6. The insulator 5 wraps the upper part of each terminal 3, the relay body 2 and the circuit board 4. The lower part of each terminal 3 extends downward from the insulator 5 along the Z-axis direction. In this embodiment, the insulator 5 is formed by solidifying a polymer insulating glue. The conductivity of the insulator 5 is lower than that of air, so the insulator 5 has good insulation performance.

[0077] See also Figure 3 , Figure 4 and Fig. 9 , Figure 3 , Figure 4 and Fig. 9 The housing 6 in this embodiment is shown. Figure 3 and Figure 4 As shown, the housing 6 opens downward, and an indicator portion 52 is provided at the left end of the upper surface of the housing 6 along the X-axis direction. The indicator portion 52 is used to indicate the side where the signal terminal 11 is located along the X-axis direction. In this embodiment, the indicator portion 52 is a notch. In other embodiments, the indicator portion 52 may also be a groove or a protrusion or a bulge or a graphic or an inscription. Fig. 9As shown, in this embodiment, the inner wall of the housing 6 is further provided with three protrusions 53, and the three protrusions 53 protrude inward from the inner wall of the housing 6 respectively. The three protrusions 53 are all provided with abutting surfaces 54 downwardly along the Z-axis direction and positioning portions 55 protruding downwardly from the abutting surfaces 54 along the Z-axis direction. Among them, the abutting surfaces 54 of the three protrusions 53 are all located on the same plane perpendicular to the Z-axis direction. The three positioning portions 55 are arranged corresponding to the three positioning grooves 18 along the Z-axis direction and extend downwardly into the corresponding positioning grooves 18 along the Z-axis direction so that the abutting surfaces 54 abut against the circuit board 4 along the Z-axis direction. Specifically, the three positioning portions 55 are respectively a first positioning portion 56, a second positioning portion 57 and a third positioning portion 58. The first positioning portion 56 extends into the first positioning groove 49, the second positioning portion 57 extends into the second positioning groove 50, and the third positioning portion 58 extends into the third positioning groove 51. In this embodiment, it can be seen from the positions of the three positioning slots 18 that each positioning portion 55 can extend into all the positioning slots 18 only when the signal terminal connection point 20 is located on the same side as the indicating portion 52 along the X-axis direction.

[0078] The assembly process of the withstand voltage relay 1 in this embodiment is as follows:

[0079] First, connect the relay body 2 and the terminal 3 to the circuit board 4, weld each signal pin 9 to the corresponding signal pin connection point 19, weld each load pin 10 to the corresponding load pin connection point 21, weld each signal terminal 11 to the corresponding signal terminal connection point 20, and weld each load terminal 12 to the corresponding load terminal connection point 22.

[0080] Next, the housing 6 is inverted along the Z-axis direction so that the opening originally facing downward faces upward. The circuit board 4 together with the relay body 2 and the terminal 3 are inserted into the housing 6 so that the signal terminal connection point 20 is located on the same side as the indicating portion 52 along the X-axis direction, so that each positioning portion 55 extends into each positioning groove 18 until the abutting surface 54 abuts against the circuit board 4. Figure 4 As shown, the circuit board 4 divides the cavity of the housing 6 into an upper injection cavity 59 (located below the circuit board 4 at this time) and a lower injection cavity 60 (located above the circuit board 4 at this time) along the Z-axis direction. The relay body 2 is located in the upper injection cavity 59, the upper part of the terminal 3 is located in the upper injection cavity 59, and the lower part of the terminal 3 is located in the lower injection cavity 60 and extends out of the housing 6 along the Z-axis direction.

[0081] Next, the insulating glue can be injected from the first glue injection port 46. During the process of injecting the insulating glue into the upper glue injection cavity 59, the gas is discharged from the second glue injection port 47 and the third glue injection port 48. The insulating glue is continuously injected, and the insulating glue flows into the lower glue injection cavity 60 from the through grooves 16, the second glue injection port 47 and the third glue injection port 48, and submerges the circuit board 4 to a predetermined position. In addition, the glue injection or exhaust can also be selected through the through grooves 16.

[0082] Finally, after the insulating glue solidifies to form the insulator 5, the assembly of the withstand voltage relay 1 is completed, and the withstand voltage relay 1 can be turned back to a normal state along the Z-axis direction.

[0083] Although this embodiment only provides an example of two signal pins 9 and two signal terminals 11, those skilled in the art can still implement the technical solution created by the present invention and achieve the corresponding technical effect when the number of signal pins 9 and signal terminals 11 exceeds two according to the clear records and guidance of the specification. Although this embodiment only provides an example of two load pins 10 and two load terminals 12, those skilled in the art can still implement the technical solution created by the present invention and achieve the corresponding technical effect when the number of load pins 10 and load terminals 12 exceeds two according to the clear records and guidance of the specification.

[0084] Although this embodiment only provides an example of establishing electrical connection between the pin 9 and the corresponding terminal 3 through the circuit board 4, it is easy for those skilled in the art to establish electrical connection between the pin and the corresponding terminal 3 by setting the signal connection part 14 and the load connection part 15 as independent entities, thereby realizing the technical solution created by the present invention and achieving the corresponding technical effect. At the same time, it is also easy for those skilled in the art to think of setting the signal pin 9, the signal connection part 14 and the signal terminal 11 to be connected as one body, and it is also easy to think of setting the load pin 10, the load connection part 15 and the load terminal 12 to be connected as one body, which can also realize the technical solution created by the present invention and achieve the corresponding technical effect.

[0085] Although this embodiment only gives an example of forming the insulator 5 by pouring insulating glue, those skilled in the art can also find other known alternative technical means to form the insulator 5 by consulting technical information, patent literature, etc., and make the insulator 5 wrap the relay body 2, part of the terminal 3 and the circuit board 4, and can also implement the technical solution created by the present invention and achieve the corresponding technical effect.

[0086] Although only an example of integrating the magnetic circuit part and the contact part into the base 7 is given in this embodiment, it is easy for a person skilled in the art to separate the magnetic circuit part and the contact part and take known insulation measures. As long as the technical solution recorded in the invention is used, it also falls within the protection scope of this patent.

[0087] Although this embodiment only provides an implementation method with only two through grooves 16, those skilled in the art can easily redesign the through groove 16 according to the clear records and guidance of the specification, such as providing one through groove 16 or multiple through grooves 16, which can also realize the technical solution created by the present invention and achieve the corresponding technical effect.

[0088] Although this embodiment only provides a fool-proof design of the positioning portion 55, those skilled in the art can easily redesign each positioning portion 55 according to the clear records and guidance of the specification, and can also achieve the technical solutions and technical effects created by the present invention.

[0089] In this embodiment, the parts of the relay body 2 and the terminals 3 that do not extend out of the insulator 5 are all wrapped by the insulator 5 with low conductivity, that is, physical isolation is provided for each pin 8 and each terminal 3 in the housing 6. Therefore, it is less likely to creep between the load pins 10 and between the load pins 10 and the signal pins 9, and short circuits or failures cannot occur by breaking through the air. Therefore, compared with the prior art, the insulation performance is effectively improved, and the withstand voltage potential of the withstand voltage relay 1 can be fully utilized.

[0090] In this embodiment, the distance between any load terminal 12 and any signal terminal 11 is greater than the distance between the corresponding load pin 10 and the corresponding signal pin 9, and the distance between the load terminal 12 and the signal terminal 11 extending out of the insulator 5 is also greater, which is not only less likely to cause failure due to air breakdown, but also less likely to cause failure due to creepage through the surface of the insulator 5 because the creepage distance between the load terminal 12 and the signal terminal 11 on the surface of the insulator 5 is increased. Therefore, compared with the prior art, the insulation performance between the load terminal 12 and the signal terminal 11 is effectively improved, the risk of the signal terminal 11 being broken down is effectively reduced, and the withstand voltage potential of the withstand voltage relay 1 can be fully utilized.

[0091] In this embodiment, the distance between any two load terminals 12 is greater than the distance between the corresponding two load pins 10, and the distance between the two load terminals 12 extending out of the insulator 5 is larger, which is not only less likely to cause a short circuit due to air breakdown, but also less likely to cause a short circuit due to creepage through the surface of the insulator 5 because the creepage distance of the two load terminals 12 on the surface of the insulator 5 is increased. Therefore, compared with the prior art, the insulation performance between the load terminals 12 is effectively improved, and the withstand voltage potential of the withstand voltage relay 1 can be fully utilized.

[0092] In this embodiment, the signal connection part 14 and the load connection part 15 are formed on the circuit board 4, so that the relay body 2 and each terminal 3 can be more easily positioned in space, and it is also easier to establish an electrical connection relationship between each pin 8 and the corresponding terminal 3. Therefore, the entire withstand voltage relay 1 is easier to assemble.

[0093] In the present embodiment, each through slot 16 is configured to span a virtual straight line segment between any signal pin connection point 19 and the nearest load pin connection point 21, thereby increasing the creepage distance between any signal pin connection point 19 and the nearest load pin connection point 21 on the board body of the circuit board 4, and making it less likely for creepage between the signal pin connection point 19 and the load pin connection point 21 through the board body of the circuit board 4, thereby improving the insulation performance of the entire withstand voltage relay 1.

[0094] In the present embodiment, each through slot 16 is further configured to span a virtual straight line segment between any load pin connection point 21 and the other nearest load pin connection point 21, so that the creepage distance between any load pin connection point 21 and the other nearest load pin connection point 21 on the board body of the circuit board 4 is further increased, and it is less likely for creepage through the board body of the circuit board 4 between adjacent load pin connection points 21, thereby improving the insulation performance of the entire withstand voltage relay 1.

[0095] In the present embodiment, each through slot 16 is arranged across a virtual straight line segment between any signal pin connection point 19 and any load pin connection point 21, so that the creepage distance between any signal pin connection point 19 and each load pin connection point 21 on the board body of the circuit board 4 is increased, and it is less likely for creepage through the board body of the circuit board 4 between the signal pin connection point 19 and the load pin connection point 21, thereby improving the insulation performance of the entire withstand voltage relay 1.

[0096] In this embodiment, each through slot 16 is arranged between any two load pin connection points 21, so that the creepage distance of any two load pin connection points 21 on the board body of the circuit board 4 is increased, and it is more difficult for creepage through the board body of the circuit board 4 between the two load pin connection points 21, thereby improving the insulation performance of the entire withstand voltage relay 1.

[0097] This embodiment makes full use of the two-dimensional spatial dimensions of the circuit board 4 by arranging the connection points 13 in the X-axis direction and the Y-axis direction, thereby enlarging the distance between the load terminal 12 and the signal terminal 11 in the X-axis direction, and at the same time enlarging the distance between the load terminals 12 in the Y-axis direction.

[0098] In this embodiment, the first through slot 35 is located between each signal pin connection point 19 and each load pin connection point 21 along the X-axis direction, and a specific implementation method for increasing the creepage distance between each signal pin connection point 19 and each load pin connection point 21 on the board body of the circuit board 4 is provided. The second through slot 36 is at least partially located between two adjacent load pin connection points 21 along the Y-axis direction, and a specific implementation method for increasing the creepage distance between each load pin connection point 21 on the board body of the circuit board 4 is provided.

[0099] In this embodiment, the second through slot 36 has a notch 41 at one end of the circuit board 4 away from each signal terminal connection point 20 , so that possible creepage of each load pin connection point 21 can only occur on the side away from the notch 41 .

[0100] In this embodiment, the second slot section 43 is connected to the first slot section 42 and is away from the slot opening 41. The maximum dimension of the second slot section 43 along the Y-axis direction is greater than the spacing between two adjacent load pin connection points 21. Therefore, the creepage distance between two adjacent load pins 21 on the board body of the circuit board 4 is further increased, thereby improving the insulation performance of the entire voltage-resistant relay 1.

[0101] In this embodiment, by providing at least one glue injection port 17 on the circuit board 4, it is easier to fill the insulating glue into the housing 6, especially easier to wrap the relay body 2 and the circuit board 4. More importantly, by injecting glue through the glue injection port 17 and providing a through groove 16 on the circuit board 4, it is possible to ensure that the gas is discharged from the inside of the housing, thereby preventing the insulating glue from being unable to be filled due to the inability to discharge the gas, thereby affecting the insulation performance.

[0102] In this embodiment, the positioning portion 55 on the housing 6 cooperates with the positioning groove 18 on the circuit board 4 to ensure that the circuit board 4 is positioned in the X-axis direction and the Y-axis direction. The abutting surface 54 on the housing 6 abuts against the circuit board 4 to ensure that the circuit board 4 is positioned in the Z-axis direction, and the circuit board 4 is supported by the housing 6 before the glue is poured, thereby forming an upper glue injection cavity 59 above the circuit board 4.

[0103] In this embodiment, the abutting surface 54 is formed on the protrusion 53 of the housing 6 , and there are three protrusions 53 , which can not only save the material of the housing 6 but also effectively position and support the circuit board 4 through three-point support.

[0104] In this embodiment, the housing 6 is provided with an indicator 52 to indicate the side of the signal terminal 11 along the X-axis direction, thereby avoiding misconnection during use. The positioning portion 55 is designed to prevent mistakes, so that the signal terminal 11 and the indicator 52 are on the same side, thereby avoiding assembly errors.

[0105] The above specification and description of the embodiments are used to explain the protection scope of the present application, but do not constitute a limitation on the protection scope of the present application.

Claims

1. A voltage-resistant relay, comprising at least one relay body (2), wherein the relay body (2) is provided with a substrate (7) and pins (8), wherein the pins (8) include at least two signal pins (9) and at least two load pins (10); each pin (8) extends out of the substrate (7) along the Z-axis direction; wherein: The withstand voltage relay (1) further comprises: An insulator (5) wrapping the relay body (2); a housing (6) housing the insulator (5); and The terminals (3) include a signal terminal (11) arranged correspondingly to and electrically connected to a signal pin (9) and a load terminal (12) arranged correspondingly to and electrically connected to a load pin (10); each terminal (3) extends out of the insulator (5) along the Z-axis direction, and except for a portion of each terminal (3) extending downward out of the insulator (5), the rest of the terminal (3) is wrapped by the insulator (5); the spacing between any load terminal (12) and any signal terminal (11) is greater than the spacing between the corresponding load pin (10) and the corresponding signal pin (9).

2. A withstand voltage relay as claimed in claim 1, characterized in that: The distance between any two load terminals (12) is greater than the distance between the corresponding two load pins (10).

3. A withstand voltage relay as claimed in claim 2, characterized in that: The signal terminal (11) is electrically connected to the corresponding signal pin (9) via a signal connection portion (14); the load terminal (12) is electrically connected to the corresponding load pin (10) via a load connection portion (15); and both the signal connection portion (14) and the load connection portion (15) are wrapped by an insulator (5).

4. A withstand voltage relay as claimed in claim 3, characterized in that: The extension direction of the signal connection part (14) is perpendicular to the Z-axis direction, and the extension direction of the load connection part (15) is perpendicular to the Z-axis direction.

5. A withstand voltage relay as claimed in claim 4, characterized in that: It also includes a circuit board (4), wherein the circuit board (4), the signal connection part (14) and the load connection part (15) are wrapped by an insulator (5), and the signal connection part (14) and the load connection part (15) are formed on the circuit board (4); the circuit board (4) is provided with connection points (13), and the connection points include a signal pin connection point (19), a signal terminal connection point (20), a load pin connection point (21) and a load terminal connection point (22); the signal pin connection point (19) and the signal pin (9) are correspondingly arranged along the Z-axis direction and are correspondingly electrically connected; the signal The terminal connection point (20) and the signal terminal (11) are arranged correspondingly along the Z-axis direction and are electrically connected correspondingly; the load pin connection point (21) and the load pin (10) are arranged correspondingly along the Z-axis direction and are electrically connected correspondingly; the load terminal connection point (22) and the load terminal (12) are arranged correspondingly along the Z-axis direction and are electrically connected correspondingly; each signal terminal connection point (20) is electrically connected to a corresponding signal pin connection point (19) via a corresponding signal connection portion (14); and each load terminal connection point (22) is electrically connected to a corresponding load pin connection point (21) via a corresponding load connection portion (15).

6. A withstand voltage relay as claimed in claim 5, characterized in that: The circuit board (4) is provided with at least one through slot (16), each of the through slots (16) passes through the circuit board (4) along the Z-axis direction, and each of the through slots (16) is configured to straddle a virtual straight line segment between any signal pin connection point (19) and the nearest load pin connection point (21); each of the through slots (16) is also configured to straddle a virtual straight line segment between any load pin connection point (21) and the nearest other load pin connection point (21).

7. A withstand voltage relay as claimed in claim 6, characterized in that: Each of the through slots (16) is configured to straddle a virtual straight line segment between any signal pin connection point (19) and any load pin connection point (21); each of the through slots (16) is also configured to straddle a virtual straight line segment between any load pin connection point (21) and any other load pin connection point (21).

8. A withstand voltage relay as claimed in claim 6 or 7, characterized in that: Each signal pin connection point (19) is arranged along the Y-axis direction, each signal terminal connection point (20) is arranged along the Y-axis direction, each load pin connection point (21) is arranged along the Y-axis direction, and each load terminal connection point (22) is arranged along the Y-axis direction; each signal pin connection point (19) and each load pin connection point (21) are arranged along the X-axis direction, each signal terminal connection point (20) is farther away from each load pin connection point (21) along the X-axis direction than each signal pin connection point (19), and each load terminal connection point (22) is farther away from each signal pin connection point (19) along the X-axis direction than each load pin connection point (21).

9. A withstand voltage relay as claimed in claim 8, characterized in that: The through slot (16) comprises at least one first through slot (35) and at least one second through slot (36); the first through slot (35) is located between each signal pin connection point (19) and each load pin connection point (21) along the X-axis direction; and the second through slot (36) is at least partially located between two adjacent load pin connection points (21) along the Y-axis direction.

10. A withstand voltage relay as claimed in claim 9, characterized in that: The second through slot (36) is provided with a notch (41) at the outer edge of the circuit board (4), and the notch (41) is located at one end of the circuit board (4) away from each signal terminal connection point (20) along the X-axis direction; the second through slot (36) is provided with a first slot section (42) and a second slot section (43), the first slot section (42) is located between two adjacent load pin connection points (21) along the Y-axis direction, and the second slot section (43) is connected to the first slot section (42) along the X-axis direction and is farther away from the notch (41) than the first slot section (42); the maximum dimension of the second slot section (43) along the Y-axis direction is greater than the spacing between two adjacent load pin connection points (21).

11. A withstand voltage relay as claimed in claim 6 or 7, characterized in that: The insulator (5) is formed by solidifying insulating glue; the circuit board (4) is provided with at least one glue injection port (17), and the glue injection port (17) penetrates the circuit board (4) along the Z-axis direction.

12. A withstand voltage relay as claimed in claim 8, characterized in that: The housing (6) is provided with a contact surface (54) extending downward along the Z-axis direction and a positioning portion (55) protruding from the contact surface (54) downward along the Z-axis direction; the circuit board (4) is provided with a positioning groove (18) corresponding to each of the positioning portions (55); the positioning portion (55) is suitable for extending into the corresponding positioning groove (18) along the Z-axis direction so that the contact surface (54) contacts the circuit board (4) along the Z-axis direction.

13. A withstand voltage relay as claimed in claim 12, characterized in that: The abutment surface (54) is formed on the protrusions (53) of the housing (6), and the number of the protrusions (53) is three.

14. A withstand voltage relay as claimed in claim 12, characterized in that: The housing (6) is provided with an indicating portion (52), and the indicating portion (52) is suitable for indicating the side where the signal terminal (11) is located along the X-axis direction; the positioning portion (55) is configured to be able to extend into the positioning groove (18) only when the signal terminal connection point (20) is located on the same side as the indicating portion (52) along the X-axis direction.

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