CN217061920U - Time relay - Google Patents

Abstract

The utility model discloses a time relay, which comprises a PCBA board, a base and a magnetic circuit part, wherein the base is provided with a first input pin and a second input pin, and the magnetic circuit part comprises a coil rack and a coil wound on the coil rack; the coil frame is provided with a first metal piece and a second metal piece, two ends of the coil are respectively and electrically connected with the first metal piece and the second metal piece, the first metal piece and the second metal piece are respectively welded or riveted and fixed with the PCBA, the first metal piece is used as a common end of one input end and one output end of the PCBA, and the second metal piece is used as the other output end of the PCBA; the first metal piece is electrically connected with the first input pin through the first conductive component, and the second input pin is electrically connected with the PCBA board through the second conductive component and serves as the other input end of the PCBA board. The utility model discloses can reduce the introduction of flexible conductor to can directly utilize first metalwork, second metalwork to support the PCBA board, play effectual fixed action to the PCBA board.

Description

Time relay

Technical Field

The utility model relates to a relay technical field especially relates to a time relay.

Background

A time relay is a controller for time delay control using the principle of electronic and electromagnetic. The traditional electronic electromagnetic type time relay generally comprises an electromagnetic relay, a PCBA board and the like, the working principle of the time relay is that the contact of the electromagnetic relay is controlled to be opened and closed by controlling the way of supplying power to a coil of the electromagnetic relay at different time periods, so that the corresponding function is realized, the specific schematic block diagram is shown in figure 1, a power supply is input to the PCBA board from a corresponding pin arranged on a base, the PCBA board outputs an electric signal to the coil of the electromagnetic relay at a certain time point through calculation processing, and therefore the contact of the electromagnetic relay is controlled to be opened and closed. The above-mentioned time relay is generally assembled by using conventional electromagnetic relay (conventional relay for short) and PCBA board, but because the two ends of coil head and tail of conventional relay are usually directly wound and hung on two metal pieces 5 'and 6' set on coil frame of conventional relay, these two metal pieces 5 'and 6' are respectively welded with two input pins 3 'and 4' set on the base one by one, as shown in fig. 2. Therefore, when assembling a time relay using a conventional relay, it is common to disconnect one of the metal pieces 5 'from the corresponding input pin 3' and weld a flexible wire 7 'for connection with the PCBA board 2' as an output end of the PCBA board 2 ', as shown in fig. 2, because the metal piece 5' is in a bottom position, which is not convenient to be directly welded to the PCBA board 2 ', but only connected by the flexible wire 7'. In addition, the other metal piece 6 ' is electrically connected with the PCBA board 2 ' through a flexible lead 9 ' and serves as a common end of one input end and the other output end of the PCBA board 2 ', and an input pin 3 ' disconnected with one metal piece 5 ' is electrically connected with the PCBA board 2 ' through a flexible lead 8 ' and serves as the other input end of the PCBA board 2 '. The second way is to disconnect the end of the coil 1 'from the corresponding metal piece 5' and to disconnect the coil 1 'from the PCBA board 2' after at least one turn of release, as shown in fig. 3, as an output end of the PCBA board 2 ', however, this results in the coil 1' on the bobbin being easily released and disorderly, often requiring re-winding. In the second method, two flexible leads 8 ', 9' are also introduced, and two input pins 3 ', 4' or two metallic pieces 5 ', 6' are respectively and electrically connected with the PCBA board 2 'to serve as two power input ends of the PCBA board 2', and the metallic piece 6 'or the input pin 4' corresponding to the starting end of the coil 1 'serves as a common end of the other output end and one input end of the PCBA board 2'.

Therefore, when the time relay is assembled by adopting the conventional relay, the conventional relay and the PCBA are connected by adopting the flexible wires, so that not only are more wires and troublesome welding, but also an additional fixing structure is required to be arranged to position the PCBA.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem that prior art exists, a time relay is provided.

The utility model provides a technical scheme that its technical problem adopted is: a time relay comprises a PCBA board, a base and a magnetic circuit part, wherein the base is provided with a first input pin and a second input pin, and the magnetic circuit part comprises a coil rack and a coil wound on the coil rack; the coil frame is provided with a first metal piece and a second metal piece, two ends of the coil are respectively and electrically connected with the first metal piece and the second metal piece, the first metal piece and the second metal piece are respectively welded or riveted and fixed with the PCBA, the first metal piece is used as a common end of one input end and one output end of the PCBA, and the second metal piece is used as the other output end of the PCBA; the first metal piece is electrically connected with the first input pin through the first conductive component, and the second input pin is electrically connected with the PCBA board through the second conductive component and serves as the other input end of the PCBA board.

Furthermore, the first conductive part comprises a third metal part and a first lead, the third metal part is arranged at the bottom of the coil rack and is welded or riveted with the first input pin, and two ends of the first lead are electrically connected with the first metal part and the third metal part respectively; the second conductive part comprises a fourth metal piece and a second lead, the fourth metal piece is arranged at the bottom of the coil rack and is connected with the second input pin in a welding or riveting mode, one end of the second lead is electrically connected with the fourth metal piece, and the other end of the second lead is electrically connected with the PCBA board.

Further, coil, first wire, second wire comprise same enameled wire, the top part of this enameled wire in proper order electric connection in first metalwork and third metalwork form first wire, the enameled wire carries out the coiling on the coil former, just the enameled wire is electric connection in successively second metalwork, fourth metalwork, enameled wire and fourth metalwork electric connection's position is the end of enameled wire, the enameled wire is in partial disconnection between second metalwork and the fourth metalwork forms coil and second wire.

Further, the enameled wire is wound on the coil former twice, and the part of the enameled wire connected with the second metal part forms the tail end of the part of the enameled wire wound on the coil former for the first time and the start end of the part of the enameled wire wound on the coil former for the second time; and the part of the enameled wire wound on the coil former for the second time is formed by winding a single-stranded enameled wire into a plurality of strands of enameled wires.

Furthermore, the first metal piece, the second metal piece, the third metal piece and the fourth metal piece are respectively provided with a winding post and a connecting piece, the winding post is used for winding the enameled wire and is electrically connected with the enameled wire, and the connecting piece of the first metal piece and the connecting piece of the second metal piece are respectively welded or riveted with the PCBA board; and the connecting sheet of the third metal piece is welded or riveted with the first input pin, and the connecting sheet of the fourth metal piece is welded or riveted with the second input pin.

Furthermore, the first metal piece, the second metal piece, the third metal piece and the fourth metal piece are respectively fixed on the coil rack in an insert injection molding or riveting mode.

Furthermore, the first metal piece and the second metal piece are located on two opposite sides of the top of the coil rack, the PCBA is erected on the magnetic circuit portion, and two connecting pins are arranged at the bottom of the PCBA and are welded or riveted with the first metal piece and the second metal piece respectively.

Furthermore, the third metal piece and the fourth metal piece are located on two opposite sides of the bottom of the coil rack, the first metal piece and the third metal piece are located on the same side of the coil rack, and the second metal piece and the fourth metal piece are located on the same side of the coil rack.

Furthermore, the coil rack is horizontal, and the first metal piece, the second metal piece, the third metal piece and the fourth metal piece are located at the same axial end of the coil rack.

Further, the PCBA board comprises a base, a magnetic circuit part and a shell, wherein the PCBA board and the magnetic circuit part are contained in the shell cavity of the PCBA board; the PCBA board is vertical, two relative medial surfaces of shell are equipped with respectively and are the rectangular shape slot of vertically, the both ends that the PCBA board is relative cartridge respectively in the slot that corresponds.

The PCBA board is provided with a light source, the PCBA board is provided with a light guide column, the light guide column is arranged in the shell, one end of the light guide column penetrates through the shell, and the other end of the light guide column corresponds to the light source arranged on the PCBA board; the rotary knob penetrates through the shell and is connected with a potentiometer arranged on the PCBA board.

Furthermore, the magnetic circuit part also comprises an iron core and a yoke, the iron core is sleeved in the coil rack and is horizontal; the yoke iron is L-shaped, one horizontal side of the yoke iron is matched above the coil rack, and one vertical side of the yoke iron is matched on one axial side of the coil rack and connected with the iron core; the movable spring armature part can be asway erected on the other side of the coil frame in the axial direction and is matched with a knife edge on one side of the yoke iron in a horizontal mode; the static spring part is arranged on the base and matched with the movable spring part on the movable spring armature component; and the horizontal side of the yoke iron and the top of the armature of the movable spring armature component are connected with an elastic piece so as to provide the reset of the movable spring armature component.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. because set up on the coil former first metalwork and second metalwork, this first metalwork and second metalwork respectively with PCBA board welding or riveting fixed, and first metalwork is as the sharing of an input and an output of PCBA board holds, and the second metalwork is as another output of PCBA board makes the utility model discloses the introduction of the soft wire that can significantly reduce when realizing magnetic circuit part and PCBA board electric connection, the greatly reduced equipment degree of difficulty and improvement packaging efficiency simultaneously, can directly utilize first metalwork, second metalwork to support the PCBA board, play effectual fixed action to the PCBA board to avoid setting up extra fixed knot structure and fix a position the PCBA board.

2. First conductive part includes third metalwork and first wire, second conductive part includes fourth metalwork and second wire make first metalwork and first input pin realize electric connection and second metalwork and second input pin and realize that electric connection is more convenient to can further reduce the utility model discloses an equipment degree of difficulty.

3. Coil, first wire, second wire comprise same enameled wire, make the utility model discloses can further reduce the introduction of flexible conductor, finally realize not having the effect that flexible conductor introduced, thereby further reduced the utility model discloses an equipment degree of difficulty, further improve the utility model discloses an assembly efficiency has reduced the manufacturing cost.

4. The enameled wire is wound on the coil former twice, and the part of the enameled wire connected with the second metal piece forms the tail end of the part of the enameled wire wound on the coil former for the first time and the start end of the part of the enameled wire wound on the coil former for the second time, so that the length of a second wire obtained by breaking the enameled wire is longer, and the enameled wire is conveniently electrically connected with the PCBA board. In addition, the winding mode of the enameled wire is convenient to be used for the early-stage production, parameter adjustment and testing of the electromagnetic relay.

5. The part of the enameled wire wound for the second time on the coil frame is formed by winding a single-stranded enameled wire after being wound into a multi-stranded enameled wire, so that the second wire obtained by the disconnection of the part of the enameled wire wound for the second time is thicker, and the problems that the coil tail end is disconnected and the wire is thin and easy to break and is difficult to operate in the prior art due to the fact that the wire is directly welded with the PCBA board are solved.

6. Two relative medial surfaces of shell are equipped with respectively and are vertical rectangular shape slot, the relative both ends of PCBA board cartridge respectively in the slot that corresponds can further play the positioning action to the PCBA board.

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment.

Drawings

FIG. 1 is a schematic block diagram of a prior art time relay;

FIG. 2 is a simplified diagram of a prior art electromagnetic relay and PCBA board connection;

FIG. 3 is a simplified schematic diagram of another prior art electromagnetic relay connected to a PCBA board;

fig. 4 is an exploded schematic view of the present invention;

fig. 5 is a schematic diagram of a three-dimensional structure of an electromagnetic relay of the present invention

Fig. 6 is a schematic perspective view of an electromagnetic relay according to the present invention;

fig. 7 is a third schematic perspective view of an electromagnetic relay according to the present invention;

fig. 8 is a schematic perspective view of a first metal member according to the present invention;

fig. 9 is a schematic perspective view of a second metal member according to the present invention;

fig. 10 is a simple schematic view of the connection of the enamel wire of the present invention before disconnection;

fig. 11 is a simple schematic view of the connection of the enameled wire after disconnection;

fig. 12 is a schematic structural view of the electromagnetic relay and the PCBA board in a connected state according to the present invention;

fig. 13 is a simplified schematic view of the enameled wire and the PCBA board of the present invention in a combined state;

fig. 14 is a schematic perspective view of the housing of the present invention;

fig. 15 is a schematic perspective view of the present invention.

Detailed Description

The terms "first," "second," "third," and "fourth" in the present disclosure are used only for distinguishing between similar elements and not for describing a particular sequential or chronological order, nor are they to be construed as indicating or implying any relative importance.

Referring to fig. 4-15, a time relay of the present invention includes an electromagnetic relay and a PCBA board 9, the electromagnetic relay includes a base 1 and a magnetic circuit portion 2, the base 1 is provided with a first input pin 11 and a second input pin 12, the magnetic circuit portion 2 includes a coil frame 21 and a coil 222 wound on the coil frame 21; the coil rack 21 is provided with a first metal piece 3 and a second metal piece 4, two ends of the coil 222 are respectively and electrically connected to the first metal piece 3 and the second metal piece 4, the first metal piece 3 and the second metal piece 4 are respectively welded or riveted with the PCBA board 9, the first metal piece 3 is used as a common end of one input end and one output end of the PCBA board 9, and the second metal piece 4 is used as the other output end of the PCBA board 9; the first metal piece 3 is electrically connected with the first input pin 11 through a first conductive component, and the second input pin 12 is electrically connected with the PCBA board 9 through a second conductive component and serves as the other input end of the PCBA board 9. The first metal piece 3 and the second metal piece 4 are located on two opposite sides of the top of the coil rack 21.

In this embodiment, the first conductive component includes a third metal piece 5 and a first wire 221, the third metal piece 5 is disposed at the bottom of the coil frame 21 and welded or riveted with the first input pin 11, and two ends of the first wire 221 are electrically connected to the first metal piece 3 and the third metal piece 4 respectively; the second conductive component comprises a fourth metal piece 6 and a second lead 223, the fourth metal piece 223 is arranged at the bottom of the coil rack 21 and is welded or riveted with the second input pin 12, one end of the second lead 223 is electrically connected with the fourth metal piece 4, and the other end of the second lead 223 is electrically connected with the PCBA board 9.

In this embodiment, the coil 222, the first wire 221, and the second wire 223 are formed by a same enameled wire 22, and a starting end portion of the enameled wire 22 is electrically connected to the first metal part 3 and the third metal part 5 in sequence, so that the first wire 221 is formed at a portion of the enameled wire 22 between the first metal part 3 and the third metal part 5; the enameled wire 22 is wound on the coil frame 21, the enameled wire 22 is electrically connected to the second metal part 4 and the fourth metal part 6 in sequence, the electrically connected portion of the enameled wire 22 and the fourth metal part 6 is the end of the enameled wire 22, and the portion of the enameled wire 22 between the second metal part 4 and the fourth metal part 6 is disconnected, so that the portion of the enameled wire 22 between the first metal part 3 and the second metal part 4 forms the coil 222, and the disconnected portion of the enameled wire 22 forms the second lead 223. In other embodiments, the first and second wires are each formed of flexible wires separate from the coil.

In this embodiment, the enameled wire 22 is wound twice on the winding frame 21, and a portion where the enameled wire 22 is connected to the second metal member 4 constitutes a terminal of a portion where the enameled wire 22 is wound for the first time on the winding frame 21 and a start of a portion where the enameled wire 22 is wound for the second time on the winding frame 21. The number of turns of the enameled wire 22 wound for the first time is more than that of the enameled wire 22 wound for the second time. The part of enameled wire 22 that carries out the coiling for the second time on coil former 21 is formed by carrying out the coiling after the winding of single strand enameled wire duplex winding becomes stranded enameled wire, specifically, after enameled wire 22 accomplished the coiling for the first time on coil former 21 the second time coiling is carried out on coil former 21 after forming the coiling to make a round trip between second metalwork 4 and the spacing part on the wire winding machine, and the end is fixed in after the coiling is accomplished fourth metalwork 6. Therefore, the portion of the enamel wire where the first winding is performed on the bobbin 21 substantially constitutes the coil 222 (the first conducting wire 221 is a starting portion of the coil 222), and the portion of the enamel wire 22 where the second winding is performed on the bobbin 21 is broken to constitute the second conducting wire 223.

In this embodiment, the first metal part 3, the second metal part 4, the third metal part 5, and the fourth metal part 6 are hard metals, and have winding posts, and the winding posts are used for winding the enameled wires 22 and electrically connected to the enameled wires 22. Specifically, in the winding process, the enameled wire 22 is fixed with the winding posts of the first metal part 3, the second metal part 4, the third metal part 5 and the third metal part 5 in a winding manner, and because the part where the enameled wire 22 and the winding posts are wound is adhered with tin, a paint film on the surface of the enameled wire 22 is removed at high temperature, and the enameled wire 22 and the winding posts are welded and fixed. The first metal piece 3, the second metal piece 4, the third metal piece 5 and the fourth metal piece 6 are respectively provided with connecting pieces, the connecting pieces of the first metal piece 3 and the second metal piece 4 are respectively welded or riveted with the PCBA board 9, and the connecting pieces of the third metal piece 5 and the fourth metal piece 6 are respectively welded or riveted with the first input pin 11 and the second input pin 12. The first metal piece 3, the second metal piece 4, the third metal piece 5 and the fourth metal piece 6 are respectively fixed on the coil rack 21 in an insert injection molding mode or a riveting mode.

In this embodiment, the third metal piece 5 and the fourth metal piece 6 are located on two opposite sides of the bottom of the coil former 21, the first metal piece 3 and the third metal piece 5 are located on the same side of the coil former 21, and the second metal piece 4 and the fourth metal piece 6 are located on the same side of the coil former 21. The coil rack 21 is horizontal, and the first metal piece 3, the second metal piece 4, the third metal piece 5 and the fourth metal piece 6 are located at the same axial end of the coil rack 21.

In this embodiment, as shown in fig. 8, the fourth metal component 6 is substantially L-shaped in a top view, and includes a fixing portion 63 in addition to the winding post 61 and the connecting piece 62, the fixing portion 63 is sheet-shaped, the winding post 61 and the connecting piece 62 are located on the same side of the fixing portion 63 and are distributed vertically, and specifically, the connecting piece 62 is located below the winding post 61; the fixing portion 63 is used for fixing to the coil frame 21, and specifically, the fixing portion 63 is fixed in the coil frame 21 by insert injection molding. The structure of the third metal piece 5 and the structure of the fourth metal piece 6 are basically consistent and are approximately symmetrical with each other. As shown in fig. 9, the second metal component 4 is substantially L-shaped in a top view, and includes a fixing portion 43 in addition to the winding post 41 and the connecting piece 42, the fixing portion 43 is sheet-shaped, the winding post 41 and the connecting piece 42 are located on the same side of the fixing portion 43 and are distributed vertically, and specifically, the connecting piece 42 is located above the winding post 41; the fixing portion 43 is used for fixing to the coil frame 21, and specifically, the fixing portion 43 is fixed in the coil frame 21 by insert injection molding. The structure of the first metal piece 3 and the structure of the second metal piece 4 are basically consistent and are approximately symmetrical with each other.

In this embodiment, the PCBA board 9 stands on the magnetic circuit part 2, and the two connection pins 91 are disposed at the bottom end of the PCBA board 9, and the two connection pins 91 are respectively located at two opposite sides of the coil former 21, and are respectively welded or riveted with the first metal part 3 and the second metal part 4. Specifically, the connecting sheet of the first metal part 3 and the connecting sheet of the second metal part 4 are respectively inserted into the corresponding connecting pins 91 and then are welded and fixed with the corresponding connecting pins 91.

In this embodiment, the present invention further comprises a housing 10, wherein the housing 10 is connected to the base 1, and the PCBA plate 9, the magnetic circuit portion 2, and the like are contained in the housing cavity. Specifically, the housing 1 is connected with the base 1 in a snap-fit manner. Two opposite inner side surfaces of the housing 10 are respectively provided with a vertical elongated slot 101, as shown in fig. 12, two opposite ends of the PCBA board 9 are respectively inserted into the corresponding slots 101. Because the length direction of the PCBA board 9 is located in the vertical direction, two ends of the PCBA board 9 in the width direction are respectively inserted into the corresponding slots 101, and thus, the PCBA board 9 can be guided and further positioned.

In this embodiment, the utility model discloses still include light guide pillar 20, this light guide pillar 20 set up in the shell 10, just shell 10 is worn to locate by light guide pillar 20's one end, light guide pillar 20's the other end with the light emitting source who sets up on PCBA board 9 corresponds. The utility model discloses still include knob 30, this knob 30 wears to locate the shell 10 top, and with the potentiometre 92 that sets up on the PCBA board 9 is connected.

In this embodiment, the magnetic circuit portion 2 further includes an iron core (not shown in the figure) and a yoke 23, the iron core is sleeved in the coil frame 21 and is horizontal; the yoke 23 is L-shaped, one side of the yoke 23 in the horizontal direction is fitted over the bobbin 21, and one side of the yoke 23 in the vertical direction is fitted to one side of the bobbin 21 in the axial direction and connected to the iron core. The electromagnetic relay also comprises a movable spring armature component 7 and a static spring part 8, wherein the movable spring armature component 7 can swing and stand on the other side of the coil rack 21 in the axial direction and is matched with a knife edge on one side of a yoke 23 in a horizontal manner; the static spring part 8 is arranged on the base 1 and is matched with the movable spring part 72 on the movable spring armature component 7; one side of the yoke 23 in a horizontal shape is connected with the top of the armature 71 of the moving spring armature component 7 to form an elastic piece so as to provide the resetting of the moving spring armature component 7. The elastic member is embodied as a tension spring 24. The movable spring part 72 of movable spring armature part 7 specifically adopt flexible conductor 73 with the last movable spring pin 13 electric connection that sets up of base 1, quiet spring part 8 is including normally opening quiet spring and normally closed quiet spring, movable spring part 72 cooperation of movable spring armature part 7 makes between normally opening quiet spring and normally closed quiet spring the utility model discloses an electromagnetic relay constitutes conversion type relay, but is not limited to here, in other embodiments, the utility model discloses an electromagnetic relay is normally closed relay or normally open relay.

The utility model discloses a time relay, before assembling, its electromagnetic relay is a complete relay, can carry out normal production in earlier stage, parameter adjustment and test and use.

The utility model discloses a time relay, when adopting electromagnetic relay and PCBA board 9 to assemble, earlier adopt to cut or cut off etc. mode will the part after enameled wire 22 and the 4 electric connection of second metalwork is in the position disconnection that is close to second metalwork 4, and will the part that the enameled wire carries out the coiling for the second time on the coil former is pulled out, forms second wire 223, as shown in fig. 11, at this moment, the end of the part that enameled wire 22 carries out the coiling for the first time on coil former 21 keep with the state of 4 electric connection of second metalwork. Next, the PCBA plate 9 is stood on the magnetic circuit part 2, the other end of the second lead 223 is fixed to the PCBA plate 9 by soldering, and the two connection pins 91 of the PCBA plate 9 are fixed to the second metal fitting 4 and the first metal fitting 3 by soldering, respectively, as shown in fig. 12 and 13. Finally, the housing 10 is snap-fitted to the base 1. The utility model discloses a time relay because set up on its electromagnetic relay's the coil former 21 first metalwork 3, second metalwork 4, third metalwork 5 and fourth metalwork 6, enameled wire 22 adopts the secondary coiling mode, makes the utility model discloses a when electromagnetic relay assembles, be exempted from to coil again and trade the foot electromagnetic relay, also need not to introduce the flexible lead, need not artifical bonding wire, thereby greatly reduced the utility model discloses an equipment degree of difficulty improves the utility model discloses an efficiency of assembly has reduced the utility model discloses a manufacturing cost. Particularly, the first metal piece 3 and the second metal piece 4 are respectively and directly welded or riveted with the PCBA board 9, so that the PCBA board 9 can be effectively fixed, and the PCBA board 9 is not required to be positioned by arranging an additional fixing structure.

The utility model discloses a time relay does not relate to the part and all is the same with prior art or can adopt prior art to realize.

The above embodiments are only used to further explain the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made by the technical entity of the present invention to the above embodiments all fall into the protection scope of the technical solution of the present invention.

Claims (10)

1. A time relay comprises a PCBA board, a base and a magnetic circuit part, wherein the base is provided with a first input pin and a second input pin, and the magnetic circuit part comprises a coil rack and a coil wound on the coil rack; the method is characterized in that: the coil frame is provided with a first metal piece and a second metal piece, two ends of the coil are respectively and electrically connected with the first metal piece and the second metal piece, the first metal piece and the second metal piece are respectively welded or riveted and fixed with the PCBA, the first metal piece is used as a common end of one input end and one output end of the PCBA, and the second metal piece is used as the other output end of the PCBA; the first metal piece is electrically connected with the first input pin through the first conductive part, and the second input pin is electrically connected with the PCBA board through the second conductive part and serves as the other input end of the PCBA board.

2. A time relay according to claim 1, characterized in that: the first conductive part comprises a third metal piece and a first lead, the third metal piece is arranged at the bottom of the coil rack and is welded or riveted with the first input pin, and two ends of the first lead are respectively electrically connected with the first metal piece and the third metal piece; the second conductive part comprises a fourth metal piece and a second lead, the fourth metal piece is arranged at the bottom of the coil rack and welded or riveted with the second input pin, one end of the second lead is electrically connected with the fourth metal piece, and the other end of the second lead is electrically connected with the PCBA board.

3. A time relay according to claim 2, characterized in that: coil, first wire, second wire comprise same enameled wire, the top part of this enameled wire in proper order electric connection in first metalwork and third metalwork form first wire, the enameled wire carries out the coiling on the coil former, just the enameled wire is successively electric connection in second metalwork, fourth metalwork, the enameled wire is terminal for the enameled wire with fourth metalwork electric connection's position, the enameled wire is in partial disconnection between second metalwork and the fourth metalwork forms coil and second wire.

4. A time relay according to claim 3, characterized in that: the enameled wire is wound on the coil former twice, and the part of the enameled wire connected with the second metal piece forms the tail end of the part of the enameled wire wound on the coil former for the first time and the start end of the part of the enameled wire wound on the coil former for the second time; and the part of the enameled wire wound on the coil former for the second time is formed by winding a single-stranded enameled wire into a plurality of strands of enameled wires.

5. A time relay according to claim 3, characterized in that: the first metal piece, the second metal piece, the third metal piece and the fourth metal piece are respectively provided with a winding post and a connecting piece, the winding posts are used for winding the enameled wires and are electrically connected with the enameled wires, and the connecting piece of the first metal piece and the connecting piece of the second metal piece are respectively welded or riveted with the PCBA board; and the connecting sheet of the third metal piece is welded or riveted with the first input pin, and the connecting sheet of the fourth metal piece is welded or riveted with the second input pin.

6. A time relay according to claim 2, characterized in that: the first metal piece, the second metal piece, the third metal piece and the fourth metal piece are fixed on the coil rack respectively in an insert injection molding or riveting mode.

7. A time relay according to claim 1, characterized in that: the first metal piece and the second metal piece are located on two sides of the top of the coil rack, which are opposite to each other, the PCBA is erected on the magnetic circuit part, and two connecting pins are arranged at the bottom of the PCBA and are welded or riveted with the first metal piece and the second metal piece respectively.

8. A time relay according to claim 2, characterized in that: the third metal piece and the fourth metal piece are positioned on two sides of the bottom of the coil rack, which are opposite to each other, the first metal piece and the third metal piece are positioned on the same side of the coil rack, and the second metal piece and the fourth metal piece are positioned on the same side of the coil rack; the coil rack is horizontal, and the first metal piece, the second metal piece, the third metal piece and the fourth metal piece are located at the same axial end of the coil rack.

9. A time relay according to any of claims 1-8, characterized in that: the shell is connected with the base and contains the PCBA board and the magnetic circuit part in a shell cavity of the PCBA board; the PCBA board is vertical, two opposite inner side surfaces of the shell are respectively provided with a vertical strip-shaped slot, and two opposite ends of the PCBA board are respectively inserted into the corresponding slots; the PCBA board is provided with a light source, the PCBA board is provided with a light guide column, the light guide column is arranged in the shell, one end of the light guide column penetrates through the shell, and the other end of the light guide column corresponds to the light source arranged on the PCBA board; the rotary knob penetrates through the shell and is connected with a potentiometer arranged on the PCBA board.

10. A time relay according to claim 1, characterized in that: the magnetic circuit part also comprises an iron core and a yoke, the iron core is sleeved in the coil rack, and the iron core is horizontal; the yoke is L-shaped, one horizontal side of the yoke is matched above the coil rack, and one vertical side of the yoke is matched at one axial side of the coil rack and connected with the iron core; the movable spring armature part can be asway erected on the other side of the coil frame in the axial direction and is matched with a knife edge on one side of the yoke iron in a horizontal mode; the static spring part is arranged on the base and is matched with the movable spring part on the movable spring armature component; and the horizontal side of the yoke iron is connected with the top of the armature of the moving spring armature component by an elastic piece so as to provide the resetting of the moving spring armature component.

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