Load switch and ammeter

Abstract

The invention provides a load switch and an ammeter, and relates to the technical field of electrical equipment. The load switch comprises a mounting shell, and a coil assembly, a yoke assembly, a contact mechanism, an armature assembly, an arc extinguish chamber and a terminal group which are mounted in the mounting shell. The coil assembly comprises a first coil and a second coil, and the yoke assembly is used for enabling the first coil and the second coil to form a series magnetic flux path; the contact mechanism comprises a moving contact and a static contact, and the armature assembly is in transmission connection with the moving contact and is used for driving the moving contact and the static contact to be switched on or switched off under the action of an electrified magnetic field of the coil; and the terminal group is connected with the moving contact and the static contact. The coil assembly, the armature assembly, the moving contact and the static contact are sequentially arranged along the first direction, and the arc extinguish chamber, the contact mechanism and the terminal group are sequentially arranged along the second direction, so that the load switch is reasonable in layout, more installation volume is provided for the arc extinguish chamber, the arc extinguish space is increased to enhance the arc extinguish capability, and the service life of the load switch is prolonged. Therefore, the safety and the stability of the load switch are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and more specifically, to a load switch and an electric meter. Background Art

[0002] In existing electronic devices or switchgear, as a key component for realizing circuit on-off control, the layout design of the load switch has an important impact on the overall performance, safety and space utilization rate of the whole machine. However, there are still many deficiencies in the current structural design and arrangement method of the load switch.

[0003] Specifically, multiple electrical components of the load switch are arranged in a decentralized or disorderly manner within the housing, lacking a reasonable space plan, resulting in the failure to fully utilize the internal space of the housing, restricting the miniaturization and integration development of the overall device. Moreover, the unreasonable space layout of the load switch also leads to a relatively small volume of the equipped arc extinguishing chamber, making it difficult to effectively suppress the generation and diffusion of electric arcs, affecting the safety and reliability of the device. Summary of the Invention

[0004] The present invention provides a load switch and an electric meter, which can not only optimize the utilization of the internal space of the load switch, improve the assembly efficiency, but also increase the arc extinguishing space to enhance the arc extinguishing ability, thus improving the safety and stability of the load switch to meet the development requirements of modern electronic devices for high performance and high integration.

[0005] Embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a load switch, comprising:

[0007] An installation housing;

[0008] An electromagnetic drive mechanism, which is arranged in the installation housing and includes a coil assembly, a yoke iron assembly and an armature assembly;

[0009] A coil assembly, which includes a first coil and a second coil;

[0010] A yoke iron assembly, which is used to form a series magnetic flux path for the first coil and the second coil;

[0011] A contact mechanism, which is arranged in the installation housing and includes a moving contact and a static contact;

[0012] An armature assembly, which is in transmission connection with the moving contact and is used to drive the moving contact to close or open with the static contact;

[0013] An arc extinguishing chamber, which is arranged in the installation housing;

[0014] A terminal group, which is used to connect with the moving contact and the static contact, and at least part of it is arranged outside the installation housing;

[0015] Wherein, the electromagnetic driving mechanism and the contact mechanism are arranged along a first direction, the arc extinguishing chamber, the contact mechanism and the terminal group are arranged in sequence along a second direction, and the first direction is perpendicular to the second direction.

[0016] In an optional embodiment, the first coil, the armature assembly and the second coil are arranged along the second direction.

[0017] In an optional embodiment, the axial directions of the first coil and the second coil are along the first direction, and the armature assembly is located between the first coil and the second coil.

[0018] In an optional embodiment, moving contact parts for contacting or separating from the static contact and first connection parts for connecting with the housing are respectively arranged at two ends of the moving contact.

[0019] In an optional embodiment, the first connection part is a lug with a chute, and a rotating shaft is arranged on the installation housing and penetrates through the chute; or, the first connection part is a shaft, and a chute is arranged on the housing so that the shaft can slide and / or rotate relative to the chute.

[0020] In an optional embodiment, the load switch further includes a flexible connecting wire. The first connection part is movably arranged on the installation housing through a rotating shaft. One end of the flexible connecting wire is connected with the terminal group, and the other end is connected with one side of the moving contact.

[0021] In an optional embodiment, the load switch further includes a transmission part. One end of the transmission part is connected with the armature assembly, and the connection position of the transmission part and the armature assembly is located between the coil assembly and the contact mechanism. The other end of the transmission part is connected with the end of the moving contact where the moving contact part is arranged.

[0022] In an optional embodiment, the load switch further includes a transmission part. A second connection part is further arranged on the moving contact. The first connection part is used for being movably arranged on the installation housing. The second connection part is located between the moving contact part and the first connection part. One end of the transmission part is movably connected with the armature assembly, and the other end is movably connected with the second connection part.

[0023] In an alternative embodiment, the load switch further includes a first elastic member disposed in the mounting housing. The first elastic member is configured to cooperate with the moving contact, and the cooperation position between the first elastic member and the moving contact is located between the first connection portion and the second connection portion. The first elastic member is configured to apply an elastic force when the moving contact portion contacts or separates from the static contact.

[0024] In an alternative embodiment, the load switch further includes a second elastic member disposed in the mounting housing. The second elastic member is configured to cooperate with the armature assembly to apply an elastic force to the armature assembly during the closing process of the contact mechanism.

[0025] In an alternative embodiment, the armature assembly includes a first armature, a second armature, a magnet, and a rotating shaft. The magnet is disposed between the first armature and the second armature. The axis of the rotating shaft extends along a third direction, and both the first direction and the second direction are perpendicular to the third direction.

[0026] In an alternative embodiment, the static contact includes a static contact portion and a lead-out section connected thereto. The lead-out section includes a first section and a second section. The static contact portion, the first section, and the second section are connected in sequence. During closing, the current flowing direction of the second section is opposite to that of the moving contact, and at least a part of the moving contact is located between the static contact portion and the second section.

[0027] In an alternative embodiment, both the static contact and the moving contact are disposed in the mounting housing. The terminal group includes a first terminal and a second terminal. The lead-out section is connected to the first terminal, and the moving contact is connected to the second terminal. Both the first terminal and the second terminal extend out from the same side of the mounting housing and extend along the second direction.

[0028] In an alternative embodiment, the load switch further includes a magnetic enhancement member fixedly disposed in the mounting housing;

[0029] At least a part of the magnetic enhancement member is located on one side or both sides of the moving contact along the third direction; and / or, at least a part of the magnetic enhancement member is located on the side of the moving contact along the first direction and close to the static contact;

[0030] Both the first direction and the second direction are perpendicular to the third direction.

[0031] In an alternative embodiment, at least a part of the projection of the magnetic enhancement member along the first direction coincides with at least a part of the projection of the armature assembly along the first direction.

[0032] In an alternative embodiment, the static contact is provided with a static contact portion, the moving contact is provided with a moving contact portion, the moving contact portion is used to contact or separate from the static contact portion, the static contact portion and the moving contact portion are arranged along the first direction, the arc extinguishing chamber is disposed at the moving contact portion and / or the static contact portion, and at least a partial projection of the first coil along the first direction coincides with at least a partial projection of the arc extinguishing chamber along the first direction.

[0033] In an alternative embodiment, the arc extinguishing chamber includes a plurality of grid plates, the grid plates include a first arc extinguishing portion and a second arc extinguishing portion connected at an angle, and the first arc extinguishing portion is disposed opposite to the first section in the third direction.

[0034] In an alternative embodiment, the arc extinguishing chamber includes a plurality of grid plates, the grid plates include a first arc extinguishing portion and a second arc extinguishing portion connected at an angle, and the extension length of the second arc extinguishing portion along the second direction is greater than or equal to 1 / 3 of the length of the mounting housing along the third direction.

[0035] In an alternative embodiment, the arc extinguishing chamber includes a plurality of grid plates and a first arc leading sheet and a second arc leading sheet disposed on both sides of the plurality of grid plates. The first arc leading sheet is adjacent to the static contact and is used to lead arc for the static contact, and the second arc leading sheet is correspondingly disposed with the moving contact and is used to lead arc for the moving contact.

[0036] In an alternative embodiment, the coil assembly further includes two first lead-out feet and two second lead-out feet. The first coil is energized through the two first lead-out feet, and the second coil is energized through the two second lead-out feet.

[0037] In an alternative embodiment, the load switch further includes an electronic component. Both the first lead-out foot and the second lead-out foot are electrically connected to the electronic component. The electronic component is provided with a power connection portion for connecting to an external power supply.

[0038] In a second aspect, the present invention provides an electric meter, including a housing and the load switch according to any one of the foregoing embodiments. The load switch is disposed inside the housing, and the coil assembly is located in the middle of the housing.

[0039] The beneficial effects of the load switch and the electric meter provided by the embodiments of the present invention include: by arranging the electromagnetic drive mechanism and the contact mechanism in sequence along the first direction, and arranging the arc extinguishing chamber, the contact mechanism, and the terminal group in sequence along the second direction, the coil assembly, the yoke iron assembly, the contact mechanism, the armature assembly, the arc extinguishing chamber, and the terminal group are arranged neatly and compactly, so that the layout is reasonable. This not only reduces the overall size of the load switch, but also provides support for the development of the load switch towards being thinner, lighter, and more integrated. Therefore, the load switch with a reasonable layout also provides more installation volume for the arc extinguishing chamber, thereby increasing the volume of the arc extinguishing chamber, and then realizing an increase in the arc extinguishing space to enhance the arc extinguishing ability, thus improving the safety and stability of the load switch.

[0040] By arranging the first coil and the second coil in series, the magnetic flux directions generated by the external interference magnetic field along the axis of the first coil and the second coil in the magnetic circuits of the first coil and the second coil are opposite to each other and cancel each other out, enhancing the anti-external magnetic field interference effect of the product. Moreover, the series connection of the first coil and the second coil can also improve the available space of a single coil. In a limited space, the winding volume of the enameled wire is increased, thereby increasing the ampere-turns of the product and achieving the effect of enhancing the driving force. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0042] Figure 1 Structural schematic diagram of the load switch from the first perspective provided by the embodiments of the present invention;

[0043] Figure 2 Structural schematic diagram of the load switch from the second perspective provided by the embodiments of the present invention;

[0044] Figure 3 Structural schematic diagram of the internal structure of the load switch from the first perspective provided by the embodiments of the present invention;

[0045] Figure 4 Structural schematic diagram of the internal structure of the load switch from the second perspective provided by the embodiments of the present invention;

[0046] Figure 5 Structural schematic diagram of the internal structure of the load switch from the third perspective provided by the embodiments of the present invention;

[0047] Figure 6 Partial structural schematic diagram of the load switch in the open state provided by the embodiments of the present invention;

[0048] Figure 7 Structural schematic diagram of part of the closing state of the load switch provided by the embodiment of the present invention;

[0049] Figure 8 Structural schematic diagram of the arc extinguishing chamber and the static contact provided by the embodiment of the present invention;

[0050] Figure 9 Structural schematic diagram of the arc extinguishing chamber provided by the embodiment of the present invention.

[0051] Icons: 10 - Load switch; 100 - Installation housing; 200 - Coil assembly; 210 - First coil; 220 - Second coil; 230 - Iron core; 240 - First lead pin; 250 - Second lead pin; 300 - Yoke iron assembly; 310 - First yoke iron; 320 - Second yoke iron; 400 - Contact mechanism; 410 - Moving contact; 411 - Moving contact part; 412 - First connecting part; 413 - Rotating shaft; 414 - Second connecting part; 420 - Static contact; 421 - Static contact part; 422 - Lead-out section; 423 - First section; 424 - Second section; 500 - Armature assembly; 510 - First armature; 520 - Second armature; 530 - Magnet; 540 - Rotating shaft; 600 - Arc extinguishing chamber; 610 - Grid plate; 611 - First arc extinguishing part; 612 - Second arc extinguishing part; 620 - First arc guiding plate; 630 - Second arc guiding plate; 700 - Terminal group; 710 - First terminal; 720 - Second terminal; 800 - Electronic component; 810 - Power connection part; 900 - Connecting wire; 1000 - Transmission part; 1100 - First elastic part; 1200 - Second elastic part; 1300 - Magnetism increasing part; X - First direction; Y - Second direction; Z - Third direction. Detailed implementation manners

[0052] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0053] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0054] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0055] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of the present invention is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0056] In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0057] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0058] In existing electronic devices or switching devices, the load switch is a key component for realizing circuit on / off control, and its layout design has an important impact on the overall performance, safety and space utilization rate of the whole machine. However, there are still many deficiencies in the current structural design and layout method of the load switch.

[0059] Specifically, multiple electrical components of the load switch are arranged in a decentralized or disorderly manner within the housing, lacking reasonable space planning, resulting in the failure to fully utilize the internal space of the housing, restricting the miniaturization and integration development of the overall device. Moreover, the unreasonable space layout of the load switch also leads to a relatively small volume of the equipped arc extinguishing chamber, making it difficult to effectively suppress the generation and diffusion of arcs, affecting the safety and reliability of the device.

[0060] Therefore, based on the problems existing in the prior art, it is urgently necessary to propose a load switch with a reasonable space layout, which can not only optimize the utilization of the internal space of the housing, improve the assembly efficiency, but also increase the arc extinguishing space to enhance the arc extinguishing ability, thus improving the safety and stability of the load switch to meet the development requirements of modern electronic devices for high performance and high integration.

[0061] Specifically, please refer to Figures 1 to 5The load switch 10 includes a mounting shell 100, an electromagnetic drive mechanism installed in the mounting shell 100, a contact mechanism 400, an arc extinguishing chamber 600, and a terminal group 700 that is at least partially extended outside the mounting shell 100 for connecting to an external load, etc., wherein the electromagnetic drive mechanism includes a coil assembly 200, a yoke assembly 300 and an armature assembly 500. In other words, the coil assembly 200, the yoke assembly 300, the contact mechanism 400, the armature assembly 500, and the arc extinguishing chamber 600 are all installed in the mounting shell 100.

[0062] Among them, the coil assembly 200 includes a first coil 210 and a second coil 220, and the yoke assembly 300 is used to make the first coil 210 and the second coil 220 form a series magnetic flux path; the contact mechanism 400 includes a moving contact 410 and a stationary contact 420, and the armature assembly 500 is transmission-connected to the moving contact 410, and is used to drive the moving contact 410 and the stationary contact 420 to close or open under the action of the electromagnetic field of the coil; the terminal group 700 is connected to the moving contact 410 and the stationary contact 420.

[0063] In this embodiment, the electromagnetic drive mechanism and the contact mechanism 400 are arranged in sequence along the first direction X, and the arc extinguishing chamber 600, the contact mechanism 400 and the terminal group 700 are arranged in sequence along the second direction Y (that is, the arc extinguishing chamber 600 and the terminal group 700 are respectively arranged at both ends of the contact mechanism 400), so that the coil assembly 200, the yoke assembly 300, the contact mechanism 400, the armature assembly 500, the arc extinguishing chamber 600 and the terminal group 700 are arranged neatly and compactly, thereby making their layout reasonable, which not only reduces the overall size of the load switch 10, but also provides support for the development of the load switch 10 towards lightweight and integrated.

[0064] For this reason, the load switch 10 with a reasonable layout provides more installation volume for the arc extinguishing chamber 600, thereby increasing the volume of the arc extinguishing chamber 600, thereby increasing the arc extinguishing space to enhance the arc extinguishing capability, thereby improving the safety and stability of the load switch 10.

[0065] Moreover, by connecting the first coil 210 and the second coil 220 in series, the external interference magnetic field along the axis of the first coil 210 and the second coil 220 generates magnetic fluxes in opposite directions in the magnetic circuits of the first coil 210 and the second coil 220, respectively, and cancels each other out, thereby improving the product's resistance to external magnetic field interference. Moreover, by connecting the first coil 210 and the second coil 220 in series, the available space of a single coil can be increased, and the winding volume of the enameled wire can be increased within a limited space, thereby increasing the ampere-turns of the product and achieving the effect of increasing the driving force.

[0066] In this embodiment, the first direction X is perpendicular to the second direction Y. The first direction X corresponds to the length direction of the mounting housing 100, and the second direction Y corresponds to the height direction of the mounting housing 100. In other words, the electromagnetic driving mechanism and the contact mechanism 400 are arranged along the length direction of the mounting housing 100, and the arc extinguishing chamber 600, the contact mechanism 400, and the terminal group 700 are arranged along the height direction of the mounting housing 100, so as to make the coil assembly 200, the yoke iron assembly 300, the contact mechanism 400, the armature assembly 500, the arc extinguishing chamber 600, and the terminal group 700 more neatly arranged in the mounting housing 100, ensuring that the space in the mounting housing 100 is fully utilized, and thus realizing a reasonable layout of the load switch 10.

[0067] Further, the static contact 420 is provided with a static contact part 421, and one end of the moving contact 410 is provided with a moving contact part 411. The moving contact part 411 is used to contact or separate from the static contact part 421 to realize closing or opening. In addition, the static contact part 421 and the moving contact part 411 are arranged along the first direction X, and the arc extinguishing chamber 600 is arranged at the moving contact part 411 and / or the static contact part 421; further, at least part of the projection of the first coil 210 along the first direction X coincides with at least part of the projection of the arc extinguishing chamber 600 along the first direction X.

[0068] Therefore, the arc extinguishing chamber 600 is arranged at the moving contact part 411 and / or the static contact part 421 to ensure the arc extinguishing ability of the load switch 10 and improve the operation stability and safety of the load switch 10.

[0069] In addition, it should be noted that the first coil 210 is vertically above the second coil 220 along the second direction Y, and the arc extinguishing chamber 600 and the first coil 210 are arranged along the first direction X. This not only makes the layout of the load switch 10 reasonable, but also can increase the installation space of the arc extinguishing chamber 600, thereby increasing the arc extinguishing space to enhance the arc extinguishing ability; secondly, at least part of the projection of the first coil 210 along the first direction X coincides with at least part of the projection of the arc extinguishing chamber 600 along the first direction X, which can further make the arc extinguishing chamber 600 play a role of magnetic shielding to avoid the influence of external magnetic sources on the load switch.

[0070] It can be understood that in order to ensure that the arc can be smoothly discharged after being introduced into the arc extinguishing chamber 600 for arc extinguishing, the mounting housing 100 is provided with exhaust holes at positions corresponding to the arc extinguishing chamber 600, and the exhaust holes are arranged adjacent to the arc extinguishing chamber 600. Specifically, the exhaust holes can be arranged on the bottom wall of the mounting housing 100 (i.e., the plate where the load switch 10 is attached to the bottom of the meter housing) and / or the top wall (i.e., the plate that is perpendicular to the bottom wall and away from the meter terminal when the load switch 10 is installed), ensuring the arc extinguishing effect of the load switch 10 and avoiding the temperature rise of the components near the load switch 10 during arc discharge; further, the exhaust holes are arranged at the corners of the bottom wall and the top wall of the mounting housing 100.

[0071] Further, the first coil 210, the armature assembly 500, and the second coil 220 are arranged along the second direction Y, such that the armature assembly 500 is arranged compactly and rationally with the first coil 210 and the second coil 220, improving the space utilization rate.

[0072] Further, the axial directions of the first coil 210 and the second coil 220 are along the first direction X, and the armature assembly 500 is located between the first coil 210 and the second coil 220, that is, the first coil 210, the armature assembly 500, and the second coil 220 are arranged along the second direction Y. This can not only make full use of the space in the arrangement direction of the first coil 210, the second coil 220, and the armature assembly 500 to reduce the installation volume of the armature assembly 500, the first coil 210, and the second coil 220, but also make full use of the space between the first coil 210 and the second coil 220, thereby realizing the compact arrangement and reasonable layout of the first coil 210, the second coil 220, and the armature assembly 500.

[0073] Specifically, the axial lines of the first coil 210 and the second coil 220 are arranged in parallel, and the armature assembly 500 is located between the axial lines of the first coil 210 and the second coil 220, so as to make full use of the space between the first coil 210 and the second coil 220 in the second direction Y and reduce the installation space of the first coil 210, the second coil 220, and the armature assembly 500 in the first direction X, thereby realizing the compact arrangement and reasonable layout of the first coil 210, the second coil 220, and the armature assembly 500.

[0074] Further, the yoke iron assembly 300 includes two first yoke irons 310 and one second yoke iron 320.

[0075] Among them, the first yoke iron 310 is planar, the axial lines of the first coil 210 and the second coil 220 both extend along the first direction X, the first yoke iron 310 extends along the second direction Y, the first direction X is perpendicular to the second direction Y, and the armature assembly 500 is located between the two first yoke irons 310.

[0076] It should be noted that the existing yoke iron is usually bent and the processing is relatively complex, and the number of coils is usually one, and the armature assembly 500 is arranged on one side of the coil. In this way, the coil and the armature assembly 500 will occupy a relatively large installation volume.

[0077] The load switch 10 provided by the present application sets the first coil 210 and the second coil 220, correspondingly arranges the two flat first yokes 310 with the first coil 210 and the second coil 220 respectively, and makes the extending directions of the first yoke 310 and the second yoke 320 perpendicular to the axial directions of the first coil 210 and the second coil 220, so as to arrange the armature assembly 500 between the first coil 210 and the second coil 220, thereby fully utilizing the space between the first coil 210 and the second coil 220 in the second direction Y and reducing the installation space of the first coil 210 and the second coil 220 and the armature assembly 500 in the first direction X.

[0078] Specifically, the coil assembly 200 further includes at least two iron cores 230, which are respectively passed through the first coil 210 and the second coil 220. The two first yokes 310 are respectively connected to one ends of the two iron cores 230, and the second yoke 320 is used to connect the other ends of the two iron cores 230 at the same time.

[0079] Therefore, the two first yokes 310 are respectively arranged on both sides of the armature assembly 500. And the second yoke 320, the first yoke 310 and the contact mechanism 400 are arranged in sequence along the first direction X.

[0080] Furthermore, the armature assembly 500 includes a first armature 510, a second armature 520, and a magnet 530. The magnet 530 is arranged between the first armature 510 and the second armature 520. The first armature 510 and the second armature 520 are respectively arranged on both sides of the first yoke 310 for magnetic attraction drive with the yoke assembly 300. Specifically, when the first coil 210 and the second coil 220 are energized, the yoke assembly 300 forms a series magnetic flux path to jointly drive the movement of the armature assembly 500.

[0081] Furthermore, the armature assembly 500 further includes a rotating shaft 540. The rotating shaft 540 is rotatably arranged on the mounting housing 100. The rotating shaft 540 is located between the two first yokes 310, and the rotating shaft 540 and the two first yokes 310 are arranged along the second direction Y.

[0082] In this embodiment, the rotating shaft 540 and the two first yokes 310 are located in the same plane, and the axis of the rotating shaft 540 extends along the third direction Z. Both the first direction X and the second direction Y are perpendicular to the third direction Z.

[0083] It can be understood that the third direction Z corresponds to the thickness direction of the mounting housing 100.

[0084] Further, the coil assembly 200 further includes two first lead pins 240 and two second lead pins 250. The first coil 210 is energized through the two first lead pins 240, and the second coil 220 is energized through the two second lead pins 250. The two first lead pins 240 and the two second lead pins 250 are connected to an external excitation to form an electrical circuit.

[0085] In this embodiment, one end of each of the two first lead pins 240 is arranged in parallel with the iron core 230 for winding the first coil 210, and the other end is used for connecting to an external power supply. Therefore, in the case of power-on, the current sequentially flows through one of the first lead pins 240, the first coil 210, and the other lead pin. The second coil 220 has the same structure as the first coil 210, and the arrangement of the second lead pins 250 is the same as that of the first lead pins 240, which will not be elaborated here.

[0086] Further, the load switch 10 further includes an electronic component 800. The first lead pins 240 and the second lead pins 250 are both electrically connected to the electronic component 800. The electronic component 800 is provided with a power connection part 810 for connecting to an external power supply.

[0087] It should be noted that in practical applications, since the power connection part 810 of the installation housing 100 is usually a standard structure, in order to adapt to the structure of the power connection part 810, the two first lead pins 240 and the two second lead pins 250 are both connected to the electronic component 800, and the power connection part 810 of the electronic component 800 is connected to an external power supply, so as to realize the power-on of the first coil 210 and the second coil 220 without changing the installation housing 100.

[0088] Specifically, the installation housing 100 is provided with a power connection socket, which is correspondingly arranged with the power connection part 810.

[0089] Optionally, the electronic component 800 can be, but is not limited to, a PCB board.

[0090] It is worth mentioning that in order to save installation space and make full use of the internal space of the installation housing 100, the second elastic member 1200 is installed on the electronic component 800.

[0091] In addition, it is also worth mentioning that the two first lead pins 240 and the corresponding iron core 230 and the first yoke 310 are symmetrically arranged with the two second lead pins 250 and the corresponding iron core 230 and the first yoke 310. Therefore, it is convenient to install the first coil 210 and the second coil 220.

[0092] Furthermore, a moving contact portion 411 and a first connecting portion 412 are respectively provided at both ends of the moving contact 410 . The first connecting portion 412 is used to be movably arranged on the mounting housing 100 . The moving contact 410 is used to make the moving contact portion 411 swing around the first connecting portion 412 under the drive of the armature assembly 500 .

[0093] In this embodiment, the first connecting portion 412 can be movably arranged on the mounting shell 100, so when the coil assembly 200 is energized, the generated magnetic field drives the armature assembly 500 to rotate, and thereby drives the moving contact portion 411 of the moving contact 410 to swing around the first connecting portion 412 through the armature assembly 500.

[0094] It can be understood that the load switch 10 further includes a flexible connecting wire 900 , and the moving contact 410 and the terminal group 700 are connected via the flexible connecting wire 900 .

[0095] Specifically, the first connection portion 412 is rotatably disposed on the mounting housing 100 via the rotating shaft 413 , one end of the flexible connecting wire 900 is connected to the terminal group 700 , and the other end is connected to a side of the moving contact 410 away from the rotating shaft 413 .

[0096] In other words, the connection position between the flexible connecting wire 900 and the moving contact 410 and the first connecting portion 412 are respectively located on two opposite side walls of the moving contact 410 , thereby facilitating the installation and assembly of the flexible connecting wire 900 .

[0097] In detail, the first connecting part 412 is a hanging ear structure with a slide groove, and a rotating shaft 413 is provided on the mounting shell 100, and the rotating shaft 413 is passed through the slide groove; or, the first connecting part 412 is an axis, and a slide groove is provided on the mounting shell 100, so that the axis can slide and / or rotate relative to the slide groove to provide overtravel.

[0098] Furthermore, the load switch 10 also includes a transmission member 1000, and the armature assembly 500, the transmission member 1000 and the moving contact 410 are sequentially connected in transmission. Therefore, when the coil assembly 200 is energized, the armature assembly 500 is driven to move by the generated magnetic field, and the armature assembly 500 drives the transmission member 1000 to move synchronously, and finally the transmission member 1000 drives the moving contact 410 to approach or move away from the static contact 420, so as to realize the closing or opening of the contact mechanism 400.

[0099] Furthermore, the moving contact 410 is also provided with a second connecting portion 414. The moving contact 410 and the first connecting portion 412 are respectively located at two ends of the moving contact 410. The second connecting portion 414 is located between the moving contact 410 and the first connecting portion 412. One end of the transmission member 1000 is movably connected to the armature assembly 500, and the other end is movably connected to the second connecting portion 414.

[0100] In this embodiment, the second connecting portion 414 and the first connecting portion 412 are both arranged on the same side wall of the moving contact 410, that is, the transmission member 1000 is connected to the side wall of the moving contact 410 facing away from the armature member. Therefore, when the transmission length of the transmission member 1000 remains unchanged, the installation distance between the transmission member 1000 and the moving contact 410 can be shortened, thereby making the connection structure between the transmission member 1000 and the moving contact 410 more compact, the layout more reasonable, and making full use of the installation space.

[0101] Of course, in other embodiments of the invention, one end of the transmission member 1000 is connected to the armature assembly 500, and the connection position of the transmission member 1000 and the armature assembly 500 is located between the coil assembly 200 and the contact mechanism 400, and the other end of the transmission member 1000 is connected to one end of the moving contact 410 provided with a moving contact portion 411, so that the force application position is farther away from the other end of the moving contact 410 provided with a first connection portion 412, that is, the force arm is larger, and it is easier to drive the moving contact 410 to swing.

[0102] Optionally, the transmission member 1000 is a connecting rod structure, the armature assembly 500 of the transmission member 1000 is hinged, and the other end is hinged to the second connecting portion 414 .

[0103] Furthermore, the load switch 10 further includes a first elastic member 1100 and / or a second elastic member 1200 , and the first elastic member 1100 and the second elastic member 1200 are both mounted on the mounting housing 100 .

[0104] Among them, Figure 6 and Figure 7 As shown, the first elastic member 1100 is used to cooperate with the moving contact 410, and the cooperation position of the first elastic member 1100 and the moving contact 410 is located between the first connecting portion 412 and the second connecting portion 414. The first elastic member 1100 is used to apply an elastic force when the moving contact portion 411 contacts or separates from the static contact 420.

[0105] In other words, the contact position of the moving contact 410 and the moving contact part 411 of the first elastic member 1100 are respectively located on both sides of the second connecting part 414, so that the moving contact 410 forms a lever structure through the second connecting part 414. With the second connecting part 414 as the fulcrum, during the closing process of the moving contact 410, the elastic force generated by the deformation of the first elastic member 1100 can drive the moving contact 410 to rotate around the second connecting part 414, thereby providing a force for the moving contact part 411 to move towards the static contact 420, so as to increase the closing speed of the moving contact 410; and when the moving contact part 411 contacts and closes with the static contact 420, the first elastic member 1100 is in a deformed state, so that the elastic force generated by the first elastic member 1100 can further increase the contact pressure between the moving contact part 411 and the static contact 420, thereby improving the short-circuit withstand capacity of the contact mechanism 400.

[0106] During the opening process, the elastic force generated by the first elastic member 1100 can also provide a force for the moving contact 410 to move away from the static contact 420, so as to accelerate the opening speed of the moving contact 410 and the static contact 420. Further, the first elastic member 1100 is arranged on the side of the moving contact 410 close to the static contact 420.

[0107] Moreover, the first connecting part 412 is provided with a waist-shaped hole, and the rotating shaft 413 is rotationally matched with the waist-shaped hole.

[0108] Therefore, under the action of the first elastic member 1100, the movement range of the lever structure formed by the moving contact 410 through the second connecting part 414 corresponds to the sliding distance of the rotating shaft 413 in the waist-shaped hole. In this way, on the one hand, the moving contact 410 can rotate in the form of a lever structure under the elastic force of the first elastic member 1100 to increase the acting force during closing; on the other hand, during opening, it does not provide an elastic force for the moving contact 410 to move away from the static contact 420 in the form of a lever structure, so as to accelerate the opening speed of the moving contact 410 and the static contact 420.

[0109] The second elastic member 1200 is used to cooperate with the armature assembly 500 to store energy through deformation during the opening process of the contact mechanism 400, and release energy to apply an elastic force to the armature assembly 500 to assist the contact mechanism to close during the closing process.

[0110] Similarly, when the moving contact 410 and the static contact 420 are in the open state, the second elastic member 1200 abuts against the armature assembly 500 and is in a compressed state, providing an elastic force to the armature assembly 500, so that the armature assembly 500 has a rotational tendency to drive the moving contact 410 to close. During the process that the coil assembly 200 is energized to drive the armature assembly 500 to move and drive the moving contact 410 to close, the elastic force of the second elastic member 1200 is also received, further increasing the closing speed of the moving contact 410 and the static contact 420.

[0111] Optionally, both the first elastic member 1100 and the second elastic member 1200 are in the form of a spring sheet structure. Of course, in other embodiments of the present application, the first elastic member 1100 and the second elastic member 1200 may also be other elastic structures, which are not specifically limited herein.

[0112] In addition, it should be noted that in the present application, either the first elastic member 1100 or the second elastic member 1200 can be arbitrarily set, or both can be set at the same time, which is not specifically limited herein.

[0113] Further, the static contact 420 includes a connected static contact portion 421 and a lead-out section 422. The terminal group 700 includes a first terminal 710 and a second terminal 720. The lead-out section 422 is connected to the first terminal 710, and the moving contact 410 is connected to the second terminal 720.

[0114] That is to say, the lead-out end of the static contact 420 is composed of a two-stage structure of the lead-out section 422 and the first terminal 710, thereby reducing the process manufacturing difficulty of the lead-out end of the static contact 420 and facilitating its assembly.

[0115] Further, the lead-out section 422 includes a first section 423 and a second section 424, and the static contact portion 421, the first section 423, and the second section 424 are connected in sequence.

[0116] When the contact mechanism 400 and the terminal group 700 are in the energized state, the current flow direction of the second section 424 is opposite to that of the moving contact 410. At this time, the magnetic field generated by the second section 424 acts on the moving contact 410, which can increase the contact pressure between the moving contact 410 and the static contact 420, thereby improving the short-circuit withstand capacity of the load switch 10; moreover, the current flow direction of the first section 423 is perpendicular to that of the second section 424, which can further increase the contact pressure between the moving contact 410 and the static contact 420, thereby further improving the short-circuit withstand capacity of the load switch 10.

[0117] It is worth mentioning that both the first terminal 710 and the second terminal 720 extend from the same side of the mounting housing 100 and extend along the second direction Y, thus facilitating the connection of the first terminal 710 and the second terminal 720 to an external power source or other electrical components.

[0118] Further, as shown in Figure 8 and Figure 9 , the arc extinguishing chamber 600 includes a plurality of grid plates 610. The grid plates 610 include a first arc extinguishing portion 611 and a second arc extinguishing portion 612 connected at an included angle (i.e., the grid plates 610 are integrally L-shaped or U-shaped). Through the structural design of the grid plates 610, the arc extinguishing performance is improved on at least two sides of the arc extinguishing member at the moving contact portion 411 and / or the static contact portion 421; further, the grid plates 610 are L-shaped, and the first arc extinguishing portion 611 is disposed opposite to the first section 423 in the third direction Z, which helps the arc move towards the first arc extinguishing portion 611 and facilitates the arc to enter the arc extinguishing chamber 600.

[0119] Further, the second arc extinguishing portion 612 is mainly used for cutting the arc. Since the space inside the load switch is small, the thickness of the second arc extinguishing portion 612 (i.e., the extension length of the second arc extinguishing portion 612 along the second direction Y) is usually small, resulting in a poor arc extinguishing effect of the load switch. In this embodiment, the extension length of the second arc extinguishing portion 612 along the second direction Y is greater than or equal to 1 / 3 of the extension length of the mounting housing 100 along the third direction Z, greatly improving the arc extinguishing performance.

[0120] Further, the arc extinguishing chamber 600 further includes a first arc guiding piece 620 and a second arc guiding piece 630 disposed on both sides of the plurality of grid plates. The first arc guiding piece 620 is adjacent to the static contact 420 and is used to guide the arc for the static contact 420 so that the arc root is transferred from the static contact 420 to the first arc guiding piece 620. The second arc guiding piece 630 is correspondingly disposed with the moving contact 410 and is used to guide the arc for the moving contact 410. After the moving contact 410 is opened, the end of the moving contact 410 corresponds to the arc guiding angle of the second arc guiding piece 630.

[0121] Further, in order to further improve the short-circuit withstand capacity of the load switch 10, the load switch 10 further includes a magnetic enhancement member 1300.

[0122] Specifically, at least a part of the magnetic enhancement member 1300 is located on one side or both sides of the moving contact 410 along the third direction Z; and / or, at least a part of the magnetic enhancement member 1300 is located on one side of the moving contact 410 along the first direction X and close to the static contact 420.

[0123] It should be noted that at least a part of the magnetic enhancement member 1300 is located on one side or both sides of the moving contact 410 in the third direction Z, and at least another part and the second section 424 of the static contact 420 are respectively located on both sides of the moving contact 410 in the first direction X, so as to further increase the contact pressure between the moving contact 410 and the static contact 420 in its energized state, thereby further improving the short-circuit withstand capacity of the load switch 10.

[0124] In this embodiment, the magnetic enhancement member 1300 is of a U-shaped structure and is fixedly disposed on one side of the moving contact 410 close to the static contact 420. For the convenience of tooling, the U-shaped structure is a split type.

[0125] Further, at least a partial projection of the magnetic enhancement member 1300 along the first direction X coincides with at least a partial projection of the electromagnetic driving mechanism along the first direction X, so that the magnetic enhancement member 1300 can shield the external magnetic source for the electromagnetic driving mechanism; further, it coincides with at least a partial projection of the armature assembly 500 of the electromagnetic driving mechanism along the first direction X.

[0126] It is worth mentioning that, in order to save the installation space and make full use of the internal space of the installation housing 100, the first elastic member 1100 is installed on the magnetic enhancement member 1300.

[0127] In summary, the embodiment of the present invention provides a load switch 10. By arranging the electromagnetic driving mechanism and the contact mechanism 400 in sequence along the first direction X, and arranging the arc extinguishing chamber 600, the contact mechanism 400, and the terminal group 700 in sequence along the second direction Y, the coil assembly 200, the yoke assembly 300, the contact mechanism 400, the armature assembly 500, the arc extinguishing chamber 600, and the terminal group 700 are arranged neatly and compactly, so that its layout is reasonable. It not only reduces the overall size of the load switch 10, but also provides support for the development of the load switch 10 towards thinness, lightness, and integration. For this reason, the load switch 10 with a reasonable layout also provides more installation volume for the arc extinguishing chamber 600, thereby increasing the volume of the arc extinguishing chamber 600, so as to increase the arc extinguishing space to enhance the arc extinguishing ability, and thus improve the safety and stability of the load switch 10.

[0128] Further, the embodiment of the present invention also provides an ammeter, including a housing and the load switch 10 as in the above embodiment. The load switch 10 is arranged in the housing, and the coil assembly 200 is located in the middle of the housing. Therefore, the influence of the external magnetic field in any direction on the coil assembly 200 can be reduced.

[0129] Moreover, the coil assembly 200 includes a first coil 210 and a second coil 220. Since the external magnetic field poles are usually N poles or S poles, even if the coil assembly 200 is affected by the external magnetic field, the N poles and S poles generated by the first coil 210 and the second coil 220 can offset the influence generated by the external magnetic field. Specifically, while the external magnetic field reduces the magnetic field of one of the poles generated by the first coil 210 and the second coil 220, it also increases the magnetic field of the other pole generated by the first coil 210 and the second coil 220. Therefore, it is ensured that the armature assembly 500 can always be subjected to a sufficient magnetic force to rotate quickly and drive the contact 410 assembly to close or open, thus improving the use stability and environmental adaptability of the load switch 10.

[0130] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims described above.

Claims

1. A load switch, characterized in that, include: Installing the housing (100); An electromagnetic drive mechanism, the electromagnetic drive mechanism being arranged in the mounting housing (100), the electromagnetic drive mechanism comprising a coil assembly (200), a yoke assembly (300) and an armature assembly (500); A coil assembly (200), the coil assembly (200) comprising a first coil (210) and a second coil (220); A yoke assembly (300), the yoke assembly (300) being used to enable the first coil (210) and the second coil (220) to form a series magnetic flux path; A contact mechanism (400), the contact mechanism (400) being arranged on the mounting housing (100), the contact mechanism (400) comprising a moving contact (410) and a stationary contact (420); An armature assembly (500), the armature assembly (500) being transmission-connected to the moving contact (410) and used for driving the moving contact (410) and the stationary contact (420) to close or open; An arc extinguishing chamber (600), wherein the arc extinguishing chamber (600) is arranged in the mounting housing (100); A terminal group (700), the terminal group (700) being used to connect with the moving contact (410) and the stationary contact (420), and at least partially disposed outside the mounting housing (100); The electromagnetic drive mechanism and the contact mechanism (400) are arranged along a first direction (X), the arc extinguishing chamber (600), the contact mechanism (400) and the terminal group (700) are arranged in sequence along a second direction (Y), and the first direction (X) is perpendicular to the second direction (Y).

2. The load switch according to claim 1, characterized in that, The first coil (210), the armature assembly (500) and the second coil (220) are arranged along the second direction (Y).

3. The load switch according to claim 1, characterized in that, The axial directions of the first coil (210) and the second coil (220) are along the first direction (X), and the armature assembly (500) is located between the first coil (210) and the second coil (220).

4. The load switch according to claim 1, characterized in that, Both ends of the moving contact (410) are respectively provided with a moving contact portion (411) for contacting or separating with the stationary contact (420) and a first connecting portion (412) for connecting with the housing.

5. The load switch according to claim 4, characterized in that, The first connecting portion (412) is a hanging ear with a slide groove, and the mounting shell (100) is provided with a rotating shaft (413), and the rotating shaft (413) is inserted into the slide groove; or, the first connecting portion (412) is an axis, and the shell is provided with a slide groove so that the axis can slide and / or rotate relative to the slide groove.

6. The load switch according to claim 4, characterized in that, The load switch further comprises a flexible connecting wire (900); the first connecting portion (412) is movably arranged on the mounting housing (100) via a rotating shaft (413); one end of the flexible connecting wire (900) is connected to the terminal group (700), and the other end is connected to one side of the moving contact (410).

7. The load switch according to claim 4, characterized in that, The load switch further includes a transmission member (1000), one end of the transmission member (1000) is connected to the armature assembly (500), and the connection position between the transmission member (1000) and the armature assembly (500) is located between the coil assembly (200) and the contact mechanism (400), and the other end of the transmission member (1000) is connected to one end of the moving contact (410) where the moving contact portion (411) is provided.

8. The load switch according to claim 4, characterized in that, The load switch further includes a transmission member (1000), and a second connection portion (414) is further provided on the moving contact (410). The first connection portion (412) is configured to be movably disposed on the mounting housing (100). The second connection portion (414) is located between the moving contact portion (411) and the first connection portion (412). One end of the transmission member (1000) is movably connected to the armature assembly (500), and the other end is movably connected to the second connection portion (414).

9. The load switch according to claim 8, characterized in that, The load switch further includes a first elastic member (1100). The first elastic member (1100) is disposed on the mounting housing (100). The first elastic member (1100) can cooperate with the moving contact (410), and the cooperation position between the first elastic member (1100) and the moving contact (410) is located between the first connection portion (412) and the second connection portion (414). The first elastic member (1100) is configured to apply an elastic force when the moving contact portion (411) contacts or separates from the static contact (420).

10. The load switch according to claim 1, characterized in that, The load switch further includes a second elastic member (1200). The second elastic member (1200) is disposed on the mounting housing (100). The second elastic member (1200) is configured to cooperate with the armature assembly (500) to apply an elastic force to the armature assembly (500) during the closing process of the contact mechanism (400).

11. The load switch according to claim 1, wherein The armature assembly (500) includes a first armature (510), a second armature (520), a magnet (530), and a rotating shaft (540). The magnet (530) is disposed between the first armature (510) and the second armature (520). The axis of the rotating shaft (540) extends along the third direction (Z), and both the first direction (X) and the second direction (Y) are perpendicular to the third direction (Z).

12. The load switch according to claim 1, characterized in that, The static contact (420) includes a static contact portion (421) and a lead-out section (422) connected to each other. The lead-out section (422) includes a first section (423) and a second section (424). The static contact portion (421), the first section (423), and the second section (424) are connected in sequence. During closing, the current flowing direction of the second section (424) is opposite to that of the moving contact (410), and at least a part of the moving contact (410) is located between the static contact portion (421) and the second section (424).

13. The load switch according to claim 12, characterized in that, The static contact (420) and the moving contact (410) are both disposed within the mounting housing (100). The terminal group (700) includes a first terminal (710) and a second terminal (720). The lead-out section (422) is connected to the first terminal (710), and the moving contact (410) is connected to the second terminal (720). Both the first terminal (710) and the second terminal (720) extend out from the same side of the mounting housing (100) and extend along the second direction (Y).

14. The load switch according to any one of claims 1-13, characterized in that, The load switch further includes a magneto-increasing member (1300) fixedly disposed on the mounting housing (100); At least a part of the magneto-increasing member (1300) is located on one side or both sides of the moving contact (410) along the third direction (Z); and / or, at least a part of the magneto-increasing member (1300) is located on the side of the moving contact (410) along the first direction (X) and close to the static contact (420); Both the first direction (X) and the second direction (Y) are perpendicular to the third direction (Z).

15. The load switch according to claim 14, characterized in that, At least a part of the projection of the magneto-increasing member (1300) along the first direction (X) coincides with at least a part of the projection of the armature assembly (500) along the first direction (X).

16. The load switch according to claim 1, characterized in that, The static contact (420) is provided with a static contact portion (421), and the moving contact (410) is provided with a moving contact portion (411). The moving contact portion (411) is used to contact or separate from the static contact portion (421). The static contact portion (421) and the moving contact portion (411) are arranged along the first direction (X). The arc extinguishing chamber (600) is disposed at the moving contact portion (411) and / or the static contact portion (421). At least a part of the projection of the first coil (210) along the first direction (X) coincides with at least a part of the projection of the arc extinguishing chamber (600) along the first direction (X).

17. The load switch according to claim 12, characterized in that, The arc extinguishing chamber (600) includes a plurality of grid plates (610). The grid plates include a first arc extinguishing portion (611) and a second arc extinguishing portion (612) connected at an angle. The first arc extinguishing portion (611) is disposed opposite to the first section (423) in the third direction (Z).

18. The load switch according to claim 1, characterized in that, The arc extinguishing chamber (600) includes a plurality of grid plates (610). The grid plates (610) include a first arc extinguishing portion (611) and a second arc extinguishing portion (612) connected at an angle. The extension length of the second arc extinguishing portion (612) along the second direction (Y) is greater than or equal to 1 / 3 of the length of the mounting housing (100) along the third direction (Z).

19. The load switch according to any one of claims 1, 17 or 18, characterized in that, The arc extinguishing chamber (600) includes a plurality of grid plates (610) and a first arc leading sheet (620) and a second arc leading sheet (630) disposed on both sides of the plurality of grid plates (610). The first arc leading sheet (620) is adjacent to the static contact (420) and is used to lead the arc for the static contact (420). The second arc leading sheet (630) is correspondingly disposed with the moving contact (410) and is used to lead the arc for the moving contact (410).

20. The load switch according to claim 1, characterized in that, The coil assembly (200) further includes two first lead pins (240) and two second lead pins (250). The first coil (210) is energized through the two first lead pins (240), and the second coil (220) is energized through the two second lead pins (250).

21. The load switch according to claim 20, characterized in that, The load switch further includes an electronic component (800). Both the first lead pin (240) and the second lead pin (250) are electrically connected to the electronic component (800). The electronic component (800) is provided with a power connection part (810) for connecting to an external power supply.

22. An electricity meter, characterized in that, It includes a housing and the load switch according to any one of claims 1-21. The load switch is disposed inside the housing, and the coil assembly (200) is located in the middle of the housing.

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