CN212659722U - Rotary socket protective door and extension socket - Google Patents

Abstract

The utility model discloses a rotary socket protective door and a power strip, which comprises a shutter base, at least a first live wire jack and a first zero wire jack; the first protective door can be rotatably arranged on the stop door base, and the first live wire jack and the first zero wire jack can be selectively opened or closed by rotating the first protective door; an elasticity piece that resets acts on shutter base and first protective door to provide first protective door automatic re-setting effort. A first protection door arranged in a rotary mode is adopted to open or close a first live wire jack and a first zero line jack in a rotary mode; the linear moving mode used in the traditional technology is replaced, and the first protective door and the second protective door do not need to be overlapped up and down, so that the assembly of the first protective door and the second protective door is simpler and more convenient; compared with the traditional first protection door, the first protection door arranged in a rotating mode rotates more stably.

Description

Rotary socket protective door and extension socket

Technical Field

The utility model belongs to the technical field of the socket guard gate technique and specifically relates to indicate a rotation type socket guard gate and row insert.

Background

In order to improve the safety of the socket in use and avoid accidents of electric shock caused by misoperation or incomprehension of children, protective doors are arranged below the jacks of the socket and above the plug bushes, and during work, a two-pole plug or a two-pole grounded plug is inserted into the jacks to open the protective doors and be jointed with the plug bushes below the protective doors to complete normal electric connection.

A conventional socket protection door, such as a power socket announced by chinese utility model CN 106129741B; the two-pole socket protection door and the three-pole socket protection door can move between a shielding position and an opening position through the supporting seat and the two-pole socket protection door and the three-pole socket protection door which are movably arranged on the supporting seat; the two-pole socket protection door and the three-pole socket protection door respectively shield the middle two-pole jack and the middle three-pole jack in shielding positions; the two-pole socket protection door and the three-pole socket protection door both adopt linear up-and-down movement to open the corresponding middle two-pole jack and middle three-pole jack, and due to the unreasonable arrangement of the structure, the two-pole socket protection door and the three-pole socket protection door need to be overlapped up and down to provide an avoiding space, so that the three-pole socket protection door can have enough moving space to open the middle three-pole jack; due to the arrangement of the structure, the two-pole socket protection door and the three-pole socket protection door are very inconvenient.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to the deficiency of the prior art, and the main objective of the present invention is to provide a rotary socket protective door and a patch board, which are reasonable in structural arrangement and effectively solve the problem of troublesome assembly of the existing socket protective door.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a rotary socket protective door comprises

The shutter base is at least provided with a first live wire jack and a first zero line jack;

the first protective door can be rotatably arranged on the stop door base, and the first live wire jack and the first zero wire jack can be selectively opened or closed by rotating the first protective door;

and the elastic resetting piece acts between the stop door base and the first protection door to provide an automatic resetting acting force for the first protection door.

As a preferred embodiment: the first protection door is provided with a first guide surface; when the plug is inserted, the plug acts on the first guide surface to rotate the first protection door.

As a preferred embodiment: the first protection door is provided with a first avoidance window, and the first protection door is rotated to enable the first avoidance window to expose the first live wire jack or the first zero wire jack;

the first guide surface is arranged on one side of the first protection door and/or one side of the first avoidance window.

As a preferred embodiment: one of the shutter base and the first protective door is provided with a rotating shaft, and the other shutter base is provided with a rotating shaft hole which is mutually pivoted with the rotating shaft.

As a preferred embodiment: a pin joint shaft sleeve and a mounting through hole are also arranged;

the pivoting shaft sleeve is arranged in the mounting through hole, and the left side and/or the right side of the pivoting shaft sleeve is/are arranged in a gap with the mounting through hole so that the first protection door can swing in a deflection way;

the rotating shaft hole is arranged on the pin joint shaft sleeve.

As a preferred embodiment: the shutter base is provided with first salient points which are arranged at a left-right interval, and the bottom of the first protective door is provided with second salient points which are arranged at a left-right interval;

the single first guide surface can limit the second salient point to one side of the first salient point, so that the first protection door cannot rotate.

As a preferred embodiment: the elastic reset piece is a torsion spring and is provided with a spring body, a first torsion arm and a second torsion arm, wherein the first torsion arm and the second torsion arm are connected with the spring body; the spring body is sleeved on the rotating shaft, the first torsion arm is propped against the first protection door, and the second torsion arm is propped against the stop door base;

or the elastic reset piece is a pressure spring;

or the elastic reset piece is a tension spring;

or, the elastic reset piece is an elastic piece.

As a preferred embodiment: the shutter base is also provided with a second live wire jack and a second zero line jack; and the second live wire jack and the second zero wire jack can be selectively opened or closed by moving the second protective door.

As a preferred embodiment: a moving guide groove is formed between the second live wire jack and the second zero line jack, and the second protective door is provided with a moving convex part limited by the moving guide groove;

and a ground wire jack is arranged between the second live wire jack and the second zero wire jack, the ground wire jack is arranged at the rear side of the movable guide groove and is communicated with the movable guide groove along the front-rear direction, and the movable convex part can selectively move back and forth in the ground wire jack and the movable guide groove.

A row socket comprises a shell, an inserting piece component and a rotary socket protection door;

the shell is at least provided with sockets which are arranged in one-to-one correspondence with the first live wire jacks and the first zero line jacks;

the shutter base is arranged on the inner side of the shell, and the first protection door is arranged between the shell and the shutter base;

the inserting piece component is arranged corresponding to the ground wire jack, the first live wire jack and the first zero line jack.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme:

a first protection door arranged in a rotary mode is adopted to open or close a first live wire jack and a first zero line jack in a rotary mode; the linear moving mode used in the traditional technology is replaced, and the first protective door and the second protective door do not need to be overlapped up and down, so that the assembly of the first protective door and the second protective door is simpler and more convenient;

secondly, compared with the traditional linear moving protective door, the first protective door arranged in a rotary mode rotates more stably;

moreover, through the arrangement of the first salient point and the second salient point, the first guide surface with single action can limit the second salient point to one side of the first salient point, so that the first protection door cannot rotate, the phenomenon that a child inserts foreign matters into a single hole to turn the first protection door open when playing is effectively avoided, the first protection door can be normally turned open only when double holes are simultaneously inserted, and the use safety of the socket is further improved;

and the second protective door achieves stroke guiding through the movable convex part at the bottom and the movable guide groove on the base in an adaptive mode, the ground wire jack and the movable guide groove are ingeniously utilized to be arranged in a through mode from front to back, the ground wire jack plays a role in prolonging stroke guiding, the movable convex part can selectively move in the ground wire jack and the movable guide groove from front to back, the displacement stability of the second protective door is effectively improved, the phenomenon of deviation is avoided, meanwhile, the structure is simple, compact and reasonable, and the design space in the socket is effectively utilized.

To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic perspective view of a rotary socket protection door according to a preferred embodiment of the present invention;

fig. 2 is a schematic perspective view of another angle of the rotary socket protection door according to the preferred embodiment of the present invention;

FIG. 3 is an exploded view of the rotary socket protection door according to the preferred embodiment of the present invention;

FIG. 4 is another exploded perspective view of the rotary socket door according to the preferred embodiment of the present invention;

fig. 5 is a top view of the shutter of the revolving socket protection door according to the preferred embodiment of the present invention in a closed state;

fig. 6 is a top view of the shutter of the revolving socket protection door according to the preferred embodiment of the present invention in an open state;

FIG. 7 is a cross-sectional view of the rotary socket protection door according to the preferred embodiment of the present invention;

fig. 8 is a cross-sectional view of a rotary socket protective door according to a preferred embodiment of the present invention (the first protective door is shown in a deflected position);

fig. 9 is a schematic structural view illustrating the rotary socket protection door of the preferred embodiment of the present invention being installed in a row socket;

FIG. 10 is a schematic view of the detailed structure of FIG. 9;

FIG. 11 is a schematic view of the rotary socket protection door of the preferred embodiment of the present invention installed in a row socket (with a USB socket);

fig. 12 is a detailed structural diagram of fig. 11.

The attached drawings indicate the following:

10. shutter base 11, ground wire jack

12. A first live wire jack 13 and a first zero line jack

14. Rotating shaft 15, first stopper

16. A second live wire jack 17 and a second zero line jack

18. First salient point 19 and moving guide groove

20. First protective door 21, first guide surface

22. First dodge window 23, pin joint axle sleeve

24. Mounting through hole 25, second bump

30. Second protective door 31, first guide surface

32. Moving projection 40, elastic restoring member

41. Spring body 42, first torsion arm

43. Second torque arm 50, housing

51. Bottom shell 52 and face shell

521. Socket 522, opening

60. Inserting sheet component 61 and ground wire connecting terminal

62. Live wire connecting terminal 63 and zero line connecting terminal

64. A plug-in sheet.

Detailed Description

Referring to fig. 1 to 12, a specific structure of a preferred embodiment of the present invention is shown, which is a rotary socket protection door and a power strip.

(see fig. 1-5) the rotary socket protection door comprises a shutter base 10, a first protection door 20 and a second protection door 30, in the embodiment of the present application, the first protection door 20 is a three-pole socket protection door, and the second protection door 30 is a two-pole socket protection door; the shutter base 10 is provided with a ground wire jack 11, a first live wire jack 12, a first neutral wire jack 13, a second live wire jack 16 and a second neutral wire jack 17. The ground wire jack 11, the first live wire jack 12 and the first zero line jack 13 are arranged in a triangular mode to be suitable for inserting pins of a three-pole plug; the second live wire jack 16 and the second neutral wire jack 17 are arranged on both sides of the ground wire jack 11 to be inserted by the plug pins of the two-pole plug.

The first protection door 20 is rotatably installed on the shutter base 10, and the first live wire jack 12 and the first neutral wire jack 13 can be selectively opened or closed by rotating the first protection door 20. Specifically, the first protection door 20 is rotatably disposed, and when the first protection door rotates to open or close the first live wire jack 12 and the first neutral wire jack 13, the required stroke is shorter than that of a conventional structure in which the first protection door linearly moves up and down to open the jacks, so that the three-pole plug can be inserted more quickly.

In the present embodiment, the first protective door 20 is provided with a first guide surface 21; when the plug is inserted, the plug acts on the first guide surface 21 to rotate the first protection door 20. This first protection door takes place to rotate and can expose first live wire jack 12 and first zero line jack 13 to supply the plug pin of tripolar plug to insert in ground wire jack 11, first live wire jack 12, first zero line jack 13. This angle looks adaptation that sets up angle and three pole plug's live wire bayonet socket, zero line bayonet socket of first spigot 21 to make three pole plug's bayonet socket effect first protective door 20 rotatory effort more balanced, can not lead to socket protective door to appear the jamming or need very big power just can drive first protective door 20 rotatory because of the atress difference, the process of opening is more laborsaving, the condition of jamming can not appear yet.

In more detail, the first protection door 20 is provided with a first escape window 22, and the first protection door 20 is rotated such that the first escape window 22 exposes the first live wire jack 12 or the first neutral wire jack 13. The first guide surface 21 is provided on a side of the first protection door 20 and/or on a side of the first escape window 22. This first protective door 20 preferably adopts fan-shaped structure to set up, so the first setting of dodging window 22 of cooperation can make first protective door 20 open first live wire jack 12 and first zero line jack 13 simultaneously when rotatory, and the structure sets up ingeniously, rationally, makes first protective door 20's structure simpler, the production preparation of being convenient for.

As described above, one of the shutter base 10 and the first protective door 20 is provided with the rotary shaft 14, and the other is provided with the rotary shaft hole pivotally connected to the rotary shaft 14. In the embodiment of the present application, the rotation shaft 14 is disposed on the shutter base 10, and the rotation shaft hole is disposed on the first protective door 20. Specifically, the first protective door 20 is provided with a mounting through hole 24, and a pivot bushing 23 is installed in the mounting through hole 24; the left side or the left and right sides of the pivot shaft sleeve 23 are arranged in a clearance with the mounting through hole 24, so that the first protective door can be arranged in a vertically-deflected manner; the rotation shaft hole is provided in the pivot bushing 23. This first protective door 20 adopts the pin joint mode to install in shutter base 10, can make the rotatory in-process of first protective door 20 more smooth-going, can improve the rotational reliability of first protective door 20. The door base 10 is provided with a first stopping portion 15, and a side surface of the first protective door 20 can selectively abut against the first stopping portion 15 to define a position of the first protective door 20 in a closed state.

(see fig. 7-8) as mentioned above, the shutter base 10 is provided with first salient points 18 at left and right intervals, and the bottom of the first protective door 20 is provided with second salient points 25 at left and right intervals; the single function of the first guide surface 21 allows the second protrusion 25 to be restricted to one side of the first protrusion 18 so that the first protective door 20 cannot rotate. With such a structure, if the first guide surface 21 is used singly, the first protection door 20 cannot be opened, so that the first protection door can be prevented from being opened by inserting an object other than a plug, and the protection performance can be further improved.

The second protection door 30 is movably installed on the shutter base 10 up and down to open or close the second live wire insertion hole 16 and the second neutral wire insertion hole 17. The upper side or the lower side of the second protection door 30 is provided with a second guide surface 31, and the plug pins of the two-pole plug can drive the second protection door 30 to move up or down to open the second live wire jack 16 and the second zero wire jack 17 when being propped against the second guide surface 31, so that the live wire plug pins and the zero wire plug pins of the two-pole plug can be inserted into the corresponding second live wire jack 16 and the second zero wire jack 17. Preferably, the first guide surface 21 and the second guide surface 31 may be inclined surfaces, arc surfaces or stepped surfaces with a step-off shape, as long as the first guide surface 21 and the second guide surface 31 can act to push the corresponding first guard door 20 and the second guard door 30.

As mentioned above, the ground jack 11 is arranged between the second live jack 16 and the second neutral jack 17. The second protection door 30 is provided with a moving protrusion 32, a moving guide groove 19 is arranged between the second live wire jack 16 and the second neutral wire jack 17, and the moving protrusion 32 is limited in the moving guide groove 19; the ground jack 11 is disposed at the rear side of the moving guide groove 19 and both penetrate in the front-rear direction, and the moving protrusion 32 can selectively move in the ground jack 11 and the moving guide groove 19 in the front-rear direction. The ground jack 11 can be combined with the specific structure of the moving guide groove 19, so that the moving protrusion 32 can be completely limited to move in the moving guide groove 19, and the moving stability of the second protection door 30 can be improved; the socket protection door can be simply and compactly arranged.

The shutter socket is further provided with an elastic reset piece 40, and the elastic reset piece 40 is connected to the shutter base 10, the first protection door 20 and the second protection door 30 to provide automatic reset acting force for the first protection door 20 and the second protection door 30. In the embodiment of the present application, the elastic restoring member 40 is a torsion spring having a spring body 41 and a first torsion arm 42 and a second torsion arm 43 connected to the spring body 41; the spring 41 is sleeved on the rotating shaft 14, the first torsion arm 42 abuts against the first protection door 20, and the second torsion arm 43 abuts against the door stop base 10. Or, the elastic restoring member 40 is a pressure spring or a tension spring, one end of the spring abuts against the door stop base 10, and the other end abuts against the first protective door 20; in addition, the elastic restoring element 40 can also be an elastic sheet; can carry out corresponding change according to actual use needs, set up in a flexible way.

(see fig. 9-12) the row of plugs comprises a housing 50, a plug-in strip assembly 60 and the above-mentioned rotary socket protection door; in the embodiment of the present application, the housing 50 is provided with sockets 521, which are disposed in one-to-one correspondence with the ground wire jack 11, the first live wire jack 12, the first neutral wire jack 13, the second live wire jack 16, and the second neutral wire jack 17; the shutter base 10 is installed inside the housing 50, and the first protection door 20 is disposed between the housing 50 and the shutter base 10. Specifically, the housing has a bottom case 51 and a face case 52, the insertion opening 521 is provided in the face case, and the first protective door 20 is mounted on an inner surface of the face case 52.

This inserted sheet subassembly 60 is including ground wire connecting terminal 61, live wire connecting terminal 62 and zero line connecting terminal 63, this ground wire connecting terminal 61, live wire connecting terminal 62 and zero line connecting terminal 63 all are provided with insertion piece 64, this ground wire connecting terminal 61, the insertion piece 64 of live wire connecting terminal 62 and zero line connecting terminal 63 corresponds ground wire jack 11, first live wire jack 12, first zero line jack 13, second live wire jack 16 and second zero line jack 17 are arranged and are extended to ground wire jack 11, first live wire jack 12, first zero line jack 13, in second live wire jack 16 and the second zero line jack 17, or in ground wire jack 11, first live wire jack 12, first zero line jack 13, second live wire jack 16 and second zero line jack 17 below.

(see fig. 8-9) a first circuit board 71 and a USB socket 72 are further installed in the patch panel, the first circuit board 71 is connected to the ground connection terminal 61, the live connection terminal 62 and the neutral connection terminal 63, the USB socket 72 is integrally disposed on the first circuit board 71, the face shell 52 is provided with an opening 522 for exposing the USB socket, and the first circuit board 71 is fixedly installed on the bottom shell 52. Besides, the rotary socket protection door can also be applied to a wiring board and a socket.

The assembly process of the rotary socket protective door of the present invention is described as follows: firstly, aligning the pivot shaft sleeve 23 of the first protective door 20 with the rotating shaft 14 of the shutter base 10, and then sleeving the pivot shaft sleeve 23 on the rotating shaft 14; furthermore, one end of the torsion spring is abutted against the first protection door 20, and the other end of the torsion spring is abutted against the stop door base 10, so that the first protection door 20 can rotate on the stop door base 10 and can open or close the first live wire jack 12 and the first zero wire jack 13; then the second protective door 30 is movably arranged on the stop door base 10, one end of the spring is abutted against the second protective door 30, and the other end of the spring is abutted against the stop door base 10; finally, the entire door base 10 is mounted inside the face shell 52.

The use of the invention is generally described as follows: when the three-pole plug is inserted (see fig. 4-5), the live pin and the neutral pin of the three-pole plug are inserted from the socket 521 of the face shell 52 and act on the two first guide surfaces 21 of the first protective door 20, so that the first protective door 20 swings and rotates to expose the corresponding first live jack 12 and first neutral jack 13, and then the three-pole plug continues to act and is inserted into the corresponding insertion piece 64 through the first live jack 12, the first neutral jack 13 and the ground jack 11 for connection;

when the two-pole plug is plugged, the live wire plug pins and the zero wire plug pins of the two-pole plug are inserted from the socket 521 of the face shell 52 and act on the two second guide surfaces 31 of the second protection door 30, so that the second protection door 30 moves upwards and the second live wire jack 16 and the second zero wire jack 17 are exposed; the two-pole plug is continuously acted and is inserted into the corresponding plug sheet 64 for connection through the second live wire jack 16 and the second neutral wire jack 17.

The utility model discloses a design focus lies in: a first protection door arranged in a rotary mode is adopted to open or close a first live wire jack and a first zero line jack in a rotary mode; the linear moving mode used in the traditional technology is replaced, and the first protective door and the second protective door do not need to be overlapped up and down, so that the assembly of the first protective door and the second protective door is simpler and more convenient;

secondly, compared with the traditional linear moving protective door, the first protective door arranged in a rotary mode rotates more stably;

moreover, through the arrangement of the first salient point and the second salient point, the first guide surface with single action can limit the second salient point to one side of the first salient point, so that the first protection door cannot rotate, the phenomenon that a child inserts foreign matters into a single hole to turn the first protection door open when playing is effectively avoided, the first protection door can be normally turned open only when double holes are simultaneously inserted, and the use safety of the socket is further improved;

and the second protective door achieves stroke guiding through the movable convex part at the bottom and the movable guide groove on the base in an adaptive mode, the ground wire jack and the movable guide groove are ingeniously utilized to be arranged in a through mode from front to back, the ground wire jack plays a role in prolonging stroke guiding, the movable convex part can selectively move in the ground wire jack and the movable guide groove from front to back, the displacement stability of the second protective door is effectively improved, the phenomenon of deviation is avoided, meanwhile, the structure is simple, compact and reasonable, and the design space in the socket is effectively utilized.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a rotation type socket shutter which characterized in that: comprises that

The shutter base (10) is at least provided with a first live wire jack (12) and a first zero wire jack (13);

the first protective door (20) can be rotatably arranged on the shutter base (10), and the first live wire jack (12) and the first zero wire jack (13) can be selectively opened or closed by rotating the first protective door (20);

and the elastic resetting piece (40) acts between the shutter base (10) and the first protective door (20) to provide an automatic resetting acting force for the first protective door (20).

2. The rotary socket protective door according to claim 1, wherein: the first protective door (20) is provided with a first guide surface (21); when the plug is inserted, the plug acts on the first guide surface (21) to rotate the first protective door (20).

3. The rotary socket protective door according to claim 2, wherein: the first protection door (20) is provided with a first avoidance window (22), and the first protection door (20) is rotated to enable the first avoidance window (22) to expose the first live wire jack (12) or the first zero wire jack (13);

the first guide surface (21) is arranged on one side of the first protective door (20) and/or on one side of the first escape window (22).

4. The rotary socket protective door according to claim 1, wherein: one of the shutter base (10) and the first protective door (20) is provided with a rotating shaft (14), and the other one is provided with a rotating shaft hole which is mutually pivoted with the rotating shaft (14).

5. The rotary socket protective door according to claim 4, wherein: a pivoting shaft sleeve (23) and a mounting through hole (24) are also arranged;

the pivoting shaft sleeve (23) is arranged in the mounting through hole (24), and the left side and/or the right side of the pivoting shaft sleeve (23) and the mounting through hole (24) are arranged in a clearance mode so that the first protective door (20) can swing in a deflection mode;

the rotating shaft hole is formed in the pivoting shaft sleeve (23).

6. The rotary socket protective door according to claim 5, wherein: the shutter base (10) is provided with first salient points (18) which are arranged at a left-right interval, and the bottom of the first protective door (20) is provided with second salient points (25) which are arranged at a left-right interval;

the single function of the first guide surface (21) can limit the second salient point (25) to one side of the first salient point (18) so that the first protective door (20) can not rotate.

7. The rotary socket protective door according to claim 1, wherein: the elastic reset piece (40) is a torsion spring and is provided with a spring body (41), a first torsion arm (42) and a second torsion arm (43) which are connected with the spring body (41); the spring body (41) is sleeved on the rotating shaft (14), the first torsion arm (42) abuts against the first protection door (20), and the second torsion arm (43) abuts against the stop door base (10);

or the elastic reset piece (40) is a pressure spring;

or the elastic reset piece (40) is a tension spring;

or the elastic reset piece (40) is an elastic piece.

8. The rotary socket protective door according to claim 2, wherein: the shutter base (10) is also provided with a second live wire jack (16) and a second zero line jack (17); the second live jack (16) and the second neutral jack (17) are selectively opened or closed by moving the second protective door (30).

9. The rotary socket protective door according to claim 8, wherein: a moving guide groove (19) is arranged between the second live wire jack (16) and the second zero wire jack (17), and the second protective door (30) is provided with a moving convex part (32) limited by the moving guide groove (19);

and a ground wire jack (11) is arranged between the second live wire jack (16) and the second zero wire jack (17), the ground wire jack (11) is arranged at the rear side of the movable guide groove (19) and is communicated with the movable guide groove (19) along the front-rear direction, and the movable convex part (32) can selectively move in the ground wire jack (11) and the movable guide groove (19) back and forth.

10. A row inserts which characterized in that: comprises a shell (50), a plug-in sheet component (60) and the rotary socket protection door of any one of claims 1 to 9;

the shell (50) is at least provided with jacks (521) which are in one-to-one correspondence with the first live wire jack (12) and the first zero wire jack (13);

the shutter base (10) is arranged on the inner side of the shell (50), and the first protective door (20) is arranged between the shell (50) and the shutter base (10);

the inserting piece assembly (60) is arranged corresponding to the first live wire jack (12) and the first zero line jack (13).

Images