CN220509943U

CN220509943U - Combined switch with short-circuit protection

Info

Publication number: CN220509943U
Application number: CN202322013018.2U
Authority: CN
Inventors: 陈汉文; 王勇; 周华松
Original assignee: Suzhou Nenglyu Electronic Technology Co ltd
Current assignee: Suzhou Nenglyu Electronic Technology Co ltd
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2024-02-20
Anticipated expiration: 2033-07-28

Abstract

The utility model discloses a combined switch with short-circuit protection, which belongs to the technical field of combined switches and comprises the following components: the shell, the inside fixed baffle that is provided with of shell, the baffle separates into two mutually independent spaces with the shell inner space, fixedly be provided with switch structure in the space of baffle top, electric connection has the normal contact on the contact point at switch structure top, the normal contact tip has stretched out the shell, fixed mounting has short-circuit protection circuit in the space of baffle below. Therefore, the short-circuit protection circuit arranged in the external circuit can be used for timely monitoring abnormal large current by the current sensor in the switch and immediately feeding back an abnormal signal to the short-circuit protection circuit when the external circuit is short-circuited, and the short-circuit protection circuit can immediately work to cut off the circuit after receiving the signal, so that an effective protection effect is achieved on external short-circuit and electric appliances.

Description

Combined switch with short-circuit protection

Technical Field

The utility model relates to a combined switch, in particular to a combined switch with short-circuit protection, and belongs to the technical field of combined switches.

Background

A combination switch (also called a change-over switch), a switch which is usually introduced as a power supply in an electric control circuit, can be used for directly starting or stopping a low-power motor or enabling the motor to rotate forward and backward, and the like, and a local lighting circuit is also commonly controlled by the combination switch. In a broad sense, a switch that generally integrates a plurality of circuit on-off functions can be referred to as a combination switch, which is widely used in various circuit designs.

The present utility model discloses a combined switch, which comprises a shell, a large gear, a small gear, a spring, a movable contact, a static contact, a rear cover and the like, wherein a compression bar is arranged between the movable contact and the spring, a vertical bar is arranged in the spring, a cross bar is transversely arranged above the movable contact, the movable contact and the static contact can be in two groups and are arranged in a cross manner, and the cross bar is obliquely arranged above the two movable contacts to form a double-control switch.

Disclosure of Invention

The utility model aims to provide a combined switch with short-circuit protection, which can realize that when an external circuit is short-circuited, an abnormal large current is timely monitored by a current sensor in the switch and immediately an abnormal signal is fed back to the short-circuit protection circuit by the short-circuit protection circuit, and the short-circuit protection circuit can immediately work to cut off the circuit after receiving the signal, so that the combined switch with simple structure has an effective protection effect on the external short circuit and an electric appliance, and solves the technical problem that the combined switch with simple structure in the prior art lacks short-circuit protection measures.

In order to solve the problems, the following technical scheme is provided:

the utility model provides a combination switch with short-circuit protection, includes the shell, the inside fixed baffle that is provided with of shell, the baffle separates into two mutually independent spaces with the shell inner space, fixedly in the space above the baffle be provided with switch structure, electric connection has positive contact on the contact point at switch structure top, positive contact tip has stretched out the shell, fixed mounting has short-circuit protection circuit in the space below the baffle, the fixed current sensor that is provided with in the position on switch structure right side in space above the baffle, current output mouth of current sensor has negative contact through wire electric connection, negative contact tip has stretched out the shell, and above-mentioned structural style can be in time perceived unusual heavy current when switch structure switch on external circuit's the condition of circuit appears to with unusual signal transfer for short-circuit protection circuit, short-circuit protection circuit can work immediately after the signal reception and cut off the circuit, thereby plays effectual guard action to external short circuit and electrical apparatus.

Further, the switch structure includes the switching dish, rotate in the round hole of switching dish middle part seting up and be provided with the axis of rotation, the axis of rotation overcoat is equipped with the collar, fixed mounting has movable contact on the collar, movable contact is copper film body structure and its both ends are provided with overhanging contact structure, and above-mentioned structural style makes can drive movable contact through rotating the axis of rotation and rotates for movable contact can contact different positive contact, thereby realizes the switch-on work to different circuits.

Further, the front end of the rotating shaft extends out of the shell and is fixedly connected with a knob at the front end of the rotating shaft, and the knob provides a safe and convenient interaction mode for a user to rotate the rotating shaft.

Further, the switching disc comprises a chassis made of insulating materials, an annular sliding groove is formed in the front end face of the chassis, the front contact is fixedly arranged on the chassis, the front end face of the end portion of the front contact is flush with the bottom face of the sliding groove, a static contact is fixedly arranged in a groove body below the sliding groove, the front end face of the front contact is flush with the bottom face of the sliding groove, the front contact is communicated with the static contact through the sliding groove, and conditions are provided for changing a switching mode of a switching circuit through rotation of the dynamic contact.

Further, the short-circuit protection circuit comprises a first contact, the first contact is electrically connected with the static contact through a wire, the first contact is fixedly arranged on the lower end face of the partition board, a second contact is fixedly arranged on the position, close to the first contact, of the lower end face of the partition board, the second contact is electrically connected with the current sensor through a wire, a fixed plate is fixedly arranged on the position below the first contact and the second contact, a connecting shaft is slidably arranged in a hole formed in the middle of the fixed plate, the end part of the top end of the connecting shaft is fixedly connected with a third contact, the first contact and the second contact are connected through the movable third contact, the whole external circuit is smooth, and the movable characteristic of the third contact enables the first contact and the second contact to be opened and connected through movement of the third contact, so that the short-circuit protection function is achieved.

Further, the magnetic attraction piece is fixedly connected to the end part of the lower end of the connecting shaft, an electromagnet is fixedly arranged at a position, right below the magnetic attraction piece, on the bottom plate of the shell, the electromagnet is electrically connected with the control circuit module through a wire, the control circuit module is fixedly arranged on one side, located on the electromagnet, of the bottom plate of the shell, a power supply battery is arranged in the control circuit module, the control circuit module is electrically connected with the current sensor through the wire, the protection effect of short circuit is achieved through the mode that the control circuit module receives an abnormal signal sent by the current sensor to control the electromagnet to work, and the electromagnet can attract the magnetic attraction piece to drive the connecting shaft to slide downwards so as to pull the third contact piece to move downwards, so that the first contact piece is connected with the second contact piece in a split manner, and the disconnection effect of the whole external circuit is achieved.

Further, the connecting shaft is fixedly sleeved with a reset spring, and the structure can push the third contact piece to move upwards after the electromagnet is closed so that two ends of the third contact piece are respectively overlapped with the first contact piece and the second contact piece, thereby the whole external circuit is connected.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, through the short-circuit protection circuit, when the external circuit is short-circuited, the current sensor in the switch can timely monitor the abnormal large current and immediately feed back the abnormal signal to the short-circuit protection circuit, and the short-circuit protection circuit can immediately work to cut off the circuit after receiving the signal, so that the external short-circuit and the electric appliance can be effectively protected, and the generation or the deterioration of the adverse effect can be timely avoided;

specific embodiments of the utility model are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not limited in scope thereby. The embodiments of the utility model include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of a preferred embodiment of a combination switch with short circuit protection according to the present utility model;

FIG. 2 is a cross-sectional view of a preferred embodiment of a combination switch with short circuit protection according to the present utility model;

FIG. 3 is a schematic diagram of a switch structure of a preferred embodiment of a combination switch with short circuit protection according to the present utility model;

FIG. 4 is a schematic diagram of a preferred embodiment of a transfer plate structure of a combination switch with short circuit protection according to the present utility model;

fig. 5 is a schematic diagram of a short-circuit protection circuit of a preferred embodiment of a combination switch with short-circuit protection according to the present utility model.

In the figure: 1. a housing; 2. a partition plate; 3. a switch structure; 31. a switching disc; 311. a chassis; 312. a sliding groove; 313. a stationary contact; 32. a rotating shaft; 33. a mounting ring; 34. a movable contact; 35. a knob; 4. a positive contact; 5. a short-circuit protection circuit; 51. a first contact; 52. a second contact; 53. a fixing plate; 54. a connecting shaft; 55. a third contact; 56. a magnetic attraction piece; 57. an electromagnet; 58. a control circuit module; 59. a return spring; 6. a current sensor; 7. a negative contact.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

As shown in fig. 1-2, the combined switch with short-circuit protection provided in this embodiment includes a housing 1, a partition board 2 is fixedly disposed inside the housing 1, the partition board 2 partitions the space inside the housing 1 into two mutually independent spaces, a switch structure 3 is fixedly disposed in the space above the partition board 2, a positive contact 4 is electrically connected to a contact point at the top of the switch structure 3, the end of the positive contact 4 extends out of the housing 1, a short-circuit protection circuit 5 is fixedly mounted in the space below the partition board 2, a current sensor 6 is fixedly disposed at a position located on the right side of the switch structure 3 in the space above the partition board 2, a current output port of the current sensor 6 is electrically connected with a negative contact 7 through a wire, and the end of the negative contact 7 extends out of the housing 1.

As shown in fig. 3, the switch structure 3 of the combination switch with short-circuit protection provided in this embodiment includes a switching disc 31, a rotating shaft 32 is rotatably provided in a circular hole formed in the middle of the switching disc 31, a mounting ring 33 is sleeved outside the rotating shaft 32, a movable contact piece 34 is fixedly mounted on the mounting ring 33, the movable contact piece 34 is of a copper sheet body structure, and both ends of the movable contact piece are provided with overhanging contact piece structures, the movable contact piece 34 can be driven to rotate by rotating the rotating shaft 32 in the above structural form, so that the movable contact piece 34 can contact different positive contact pieces 4, thereby realizing the connection work of different circuits, the front end of the rotating shaft 32 extends out of the housing 1, and a knob 35 is fixedly connected to the front end of the rotating shaft 32, and the knob 35 provides a safe and convenient interaction mode for a user to rotate the rotating shaft 32.

As shown in fig. 4, the switch assembly with short-circuit protection provided in this embodiment includes a chassis 311 made of insulating material, a ring-shaped sliding groove 312 is provided on the front end surface of the chassis 311, the front contact 4 is fixedly mounted on the chassis 311, the front end surface of the end portion of the front contact is flush with the bottom surface of the sliding groove 312, a stationary contact 313 is fixedly mounted in a groove body below the sliding groove 312, the front end surface of the front contact is flush with the bottom surface of the sliding groove 312, and the front contact 4 is communicated with the stationary contact 313 through the sliding groove 312 in the above-mentioned structural form, so that conditions are provided for changing the switching mode of the circuit on the movable contact 34 through rotation.

As shown in fig. 5, the short-circuit protection circuit 5 includes a first contact 51, the first contact 51 is electrically connected with a static contact 313 through a wire, the first contact 51 is fixedly mounted on a lower end surface of a separator 2, a second contact 52 is fixedly disposed at a position of the lower end surface of the separator 2 near the first contact 51, the second contact 52 is electrically connected with a current sensor 6 through a wire, a fixing plate 53 is fixedly disposed at a position below the first contact 51 and the second contact 52, a connecting shaft 54 is slidably disposed in a hole formed in a middle portion of the fixing plate 53, a third contact 55 is fixedly connected at a top end portion of the connecting shaft 54, the first contact 51 and the second contact 52 are connected through the movable third contact 55 in the above-mentioned structure mode, so that the whole external circuit is smooth, the movable characteristic of the third contact piece 55 enables the first contact piece 51 and the second contact piece 52 to be disconnected through the movement of the third contact piece 55, so that the short-circuit protection function is realized, the end part of the lower end of the connecting shaft 54 is fixedly connected with the magnetic attraction piece 56, an electromagnet 57 is fixedly arranged at a position right below the magnetic attraction piece 56 on the bottom plate of the shell 1, the electromagnet 57 is electrically connected with a control circuit module 58 through a wire, a control circuit module 58 is fixedly arranged on one side of the electromagnet 57 on the bottom plate of the shell 1, a power supply battery is arranged in the control circuit module 58 and is electrically connected with the current sensor 6 through a wire, the short-circuit protection function is realized in a mode that the electromagnet 57 is controlled to work by the control circuit module 58 receiving an abnormal signal sent by the current sensor 6, the electromagnet 57 can attract the magnetic attraction piece 56 to drive the connecting shaft 54 to slide down so as to pull the third contact piece 55 to move down, the first contact piece 51 and the second contact piece 52 are disconnected, so that the disconnection effect of the whole external circuit is realized, the reset spring 59 is fixedly sleeved outside the connecting shaft 54, and the structure can push the third contact piece 55 to move upwards after the electromagnet 57 is closed so that two ends of the third contact piece are respectively overlapped with the first contact piece 51 and the second contact piece 52, and the whole external circuit is connected.

The application principle and the application flow of the utility model are as follows: the whole structure is connected into a circuit through the positive contact 4 and the negative contact 7, and the rotating shaft 32 is rotated by screwing the knob 35 to drive the movable contact 34 to rotate, so that the movable contact 34 can contact different positive contacts 4, and the connection and the switching of different circuits are realized; when a short circuit occurs in an external circuit, the current in the circuit suddenly increases, the current sensor 6 can timely detect the abnormal large current and transmit the abnormal signal to the control circuit module 58, the control circuit module 58 controls the electromagnet 57 to work after receiving the signal, and the magnetic attraction piece 56 is attracted to drive the connecting shaft 54 to slide downwards so as to pull the third contact piece 55 to move downwards, so that the first contact piece 51 is disconnected with the second contact piece 52, and the disconnection of the whole external circuit is realized, so that the protection effect on the external circuit and the electric appliance is achieved.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to specific circumstances.

While the utility model has been described in connection with specific embodiments, it will be apparent to those skilled in the art that the description is intended to be illustrative and not limiting in scope. Various modifications and alterations of this utility model will occur to those skilled in the art in light of the spirit and principles of this utility model, and such modifications and alterations are also within the scope of this utility model.

Claims

1. The utility model provides a combination switch with short-circuit protection, its characterized in that, including shell (1), the inside fixed baffle (2) that are provided with of shell (1), two mutually independent spaces are separated into with shell (1) inner space to baffle (2), fixedly in the space above baffle (2) be provided with switch structure (3), electric connection has positive contact (4) on the contact point at switch structure (3) top, positive contact (4) tip has stretched out shell (1), fixed mounting has short-circuit protection circuit (5) in the space of baffle (2) below, the fixed current sensor (6) that are provided with in the position that is located switch structure (3) right side in the space above baffle (2), the electric current delivery outlet of current sensor (6) has negative contact (7) through wire electric connection, negative contact (7) tip has stretched out shell (1).

2. The combined switch with short-circuit protection according to claim 1, wherein the switch structure (3) comprises a switching disc (31), a rotating shaft (32) is rotatably arranged in a round hole formed in the middle of the switching disc (31), a mounting ring (33) is sleeved outside the rotating shaft (32), a movable contact piece (34) is fixedly mounted on the mounting ring (33), and the movable contact piece (34) is of a copper sheet body structure and two ends of the movable contact piece are provided with overhanging contact piece structures.

3. A combination switch with short-circuit protection according to claim 2, characterized in that the front end of the rotating shaft (32) protrudes out of the housing (1) and that a knob (35) is fixedly connected to the front end of the rotating shaft (32).

4. The combination switch with short-circuit protection according to claim 2, wherein the switching disc (31) comprises a chassis (311) made of an insulating material, an annular sliding groove (312) is formed in the front end surface of the chassis (311), the front contact (4) is fixedly installed on the chassis (311) and the front end surface of the end part of the front contact is flush with the bottom surface of the sliding groove (312), and a static contact (313) is fixedly installed in a groove body below the sliding groove (312) and the front end surface of the front contact is flush with the bottom surface of the sliding groove (312).

5. The combination switch with short-circuit protection according to claim 1, wherein the short-circuit protection circuit (5) comprises a first contact (51), the first contact (51) is electrically connected with the static contact (313) through a wire, the first contact (51) is fixedly installed on the lower end face of the partition board (2), a second contact (52) is fixedly arranged at the position, close to the first contact (51), of the lower end face of the partition board (2), the second contact (52) is electrically connected with the current sensor (6) through a wire, a fixing plate (53) is fixedly arranged at the position below the first contact (51) and the second contact (52), a connecting shaft (54) is slidably arranged in a hole formed in the middle of the fixing plate (53), and the top end part of the connecting shaft (54) is fixedly connected with a third contact (55).

6. The combination switch with short-circuit protection according to claim 5, wherein the lower end part of the connecting shaft (54) is fixedly connected with a magnetic attraction piece (56), an electromagnet (57) is fixedly arranged at a position right below the magnetic attraction piece (56) on the bottom plate of the shell (1), the electromagnet (57) is electrically connected with a control circuit module (58) through a wire, the control circuit module (58) is fixedly arranged on one side of the bottom plate of the shell (1), which is positioned on the electromagnet (57), a power supply battery is arranged in the control circuit module (58) and is electrically connected with the current sensor (6) through a wire.

7. The combination switch with short-circuit protection according to claim 5, characterized in that the connecting shaft (54) is externally fixed with a return spring (59).