CN205542434U - Contact mechanism of switch - Google Patents

Abstract

The utility model discloses a contact mechanism of a switch, which comprises a static contact group, a first moving contact group and a second moving contact group. The static contact group includes a static contact piece, a first static contact and a second static contact. A moving contact group includes a first moving contact piece and a first moving contact, a second moving contact group includes a second moving contact piece, a second moving contact and a tension spring, and the first moving contact piece and the second moving contact piece are juxtaposed Arranged in parallel, and the first movable contact and the second movable contact are respectively arranged on the same side of the first movable contact and the second movable contact, one end of the tension spring is fixedly installed on the movable terminal, and the other end of the tension spring is fixed Installed on the lower part of the second movable contact and close to the second movable contact, the other end of the first movable contact and the other end of the second movable contact are respectively connected with the first force application part and the push rod assembly of the switch. With the cooperation of the second force applying part, the switch of the contact mechanism can not only realize rapid on-off, but also have stable contact and high reliability, and are especially suitable for environments with strong vibrations.

Description

A switch contact mechanism

technical field

The utility model relates to the field of switches, in particular to a contact mechanism of a switch.

Background technique

The switches on the existing market usually use two sets of rocker-type moving contact groups as the contact mechanism. The moving contact group with this structure can realize quick on-off, but when the switch is used in an environment with strong vibration, This structure is unstable, the reliability is low, and the situation of accidental on-off often occurs.

Utility model content

The technical problem to be solved by the utility model is: to provide a contact mechanism of a switch, the switch of the contact mechanism can not only realize rapid on-off, but also have stable contact and high reliability, especially suitable for environments with strong vibrations.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: a contact mechanism of a switch, including a static contact group, a first moving contact group, and a second moving contact group used in cooperation with each other, and the static contact group includes a static contact piece, the first static contact and the second static contact, the first static contact and the second static contact are fixedly installed on the static contact piece, the static contact piece is fixedly installed on the static terminal, the first moving contact group includes the second One moving contact piece and the first moving contact, the middle part of the first moving contact piece is installed on the first moving bracket, the first moving contact piece is installed on one end of the first moving contact piece, the first moving contact piece and the first static Contacts match, the second moving contact group includes the second moving contact, the second moving contact and the extension spring, the middle part of the second moving contact is installed on the second moving bracket, and the second moving contact is installed on the second moving At one end of the contact piece, the second moving contact is matched with the second static contact, the first moving contact and the second moving contact are arranged side by side in parallel, and the first moving contact and the second moving contact are respectively arranged on On the same side of the first moving contact piece and the second moving contact piece, both the first moving bracket and the second moving bracket are installed on the moving terminal, one end of the tension spring is fixedly installed on the moving terminal, and the other end of the tension spring is fixed Installed on the lower part of the second movable contact and close to the second movable contact, the other end of the first movable contact and the other end of the second movable contact are respectively connected with the first force applied on the push rod assembly of the switch Cooperate with the second force application part, the push rod assembly controls the first movable contact and the first static contact to be connected earlier than the second static contact and the second movable contact, and the push rod assembly controls the first The movable contact and the first stationary contact are separated later than the second stationary contact and the second movable contact.

As a preferred solution, the contact mechanism also includes a pressing plate located between the first moving contact group and the second moving contact group, the pressing plate is installed on the upper part of the stationary terminal and the moving terminal and presses the stationary terminal and the moving terminal against the switch On the base, the pressing plate is also provided with a matching structure that matches the push rod assembly.

As a preferred solution, the pressure plate is L-shaped, and the pressure plate includes a horizontal plate surface and a vertical plate surface, and the horizontal plate surface of the pressure plate is in tight contact with both the static terminal and the movable terminal.

As a preferred solution, the matching structure includes a boss arranged on the vertical board surface and a guide groove arranged on the horizontal board surface, the boss is used for installing the compression spring of the push rod assembly, and the guide groove Mates with the guide block on the bottom of the push rod in the push rod assembly.

As a preferred solution, the boss is a cross-shaped protrusion.

As a preferred solution, the contact mechanism also includes a brake contact group, the brake contact group includes a brake dynamic contact group and a brake static contact group that cooperate with each other, the brake dynamic contact group includes a brake movable contact, and the brake dynamic contact The point is installed on the other end of the first moving contact piece. The brake static contact group includes a brake static contact. The brake static contact is installed on the brake terminal. One end of the brake terminal is installed on the base of the switch and is pressed Press tight.

As a preferred solution, the static contact piece is integrally formed with the static terminal.

After adopting the above technical solution, the beneficial effect of the utility model is: a contact mechanism of a switch, including a static contact group, a first dynamic contact group, and a second dynamic contact group used in cooperation with each other, and the static contact group includes a static contact group The contact piece, the first static contact and the second static contact, the first static contact and the second static contact are fixedly installed on the static contact piece, and the static contact piece is fixedly installed on the static terminal, and the first moving contact group includes The first movable contact and the first movable contact, the middle part of the first movable contact is installed on the first movable bracket, the first movable contact is installed on one end of the first movable contact, the first movable contact and the first The static contacts are matched, the second moving contact group includes the second moving contact, the second moving contact and the extension spring, the middle part of the second moving contact is installed on the second moving bracket, and the second moving contact is installed on the second At one end of the moving contact, the second moving contact is matched with the second static contact, the first moving contact and the second moving contact are arranged side by side in parallel, and the first moving contact and the second moving contact are respectively arranged On the same side of the first moving contact piece and the second moving contact piece, both the first moving bracket and the second moving bracket are installed on the moving terminal, one end of the tension spring is fixedly installed on the moving terminal, and the other end of the tension spring It is fixedly installed on the lower part of the second movable contact and close to the second movable contact, the other end of the first movable contact and the other end of the second movable contact are respectively connected with the first push rod assembly The force part cooperates with the second force application part, the push rod assembly controls the first movable contact and the first static contact to be connected earlier than the second static contact and the second movable contact, and the push rod assembly controls the first The first moving contact and the first static contact are separated later than the second static contact and the second moving contact. This contact mechanism makes the assembly of the switch simple, and because of the existence of the tension spring, even if the vibration of the switch is very strong, Under the action of the tension spring, the second moving contact and the second static contact are also in stable contact by the force of the tension spring, which realizes the contact stability of the switch and high reliability, while at the same time, the first moving contact and the second The two moving contacts are rocker-type contacts, which can realize quick on-off.

And because the contact mechanism also includes a pressing plate located between the first moving contact group and the second moving contact group, the pressing plate is installed on the upper part of the static terminal and the moving terminal and presses the static terminal and the moving terminal on the base of the switch, The pressing plate is also equipped with a matching structure that matches the push rod assembly. The pressing plate is L-shaped. The pressing plate includes a horizontal plate surface and a vertical plate surface. The horizontal plate surface of the pressing plate is in tight contact with both the static terminal and the moving terminal. Simple and easy to install, the static terminal and the moving terminal can be firmly fixed on the base, and the moving contact group and the static contact group must be fixed at the same time, thus further ensuring the shock resistance of the switch.

And because the contact mechanism also includes a brake contact group, the brake contact group includes a brake dynamic contact group and a brake static contact group that cooperate with each other, and the brake dynamic contact group includes a brake movable contact, and the brake movable contact is installed on the first On the other end of the moving contact piece, the brake static contact group includes a brake static contact. The brake static contact is installed on the brake terminal. One end of the brake terminal is installed on the base of the switch and is pressed by a pressure plate. The brake The contact group can realize the rapid braking of the motor.

Moreover, since the static contact piece and the static terminal are integrally formed, it is convenient to manufacture and install, and saves manpower.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is a schematic structural view of the pressing plate in the embodiment of the present invention;

Fig. 3 is a structural schematic view of the cooperation between the utility model embodiment and the push rod assembly;

In the attached drawings: 1. Static contact; 2. First static contact; 3. Second static contact; 4. Static terminal; 5. First moving contact; 6. First moving contact; 7. Second One moving bracket; 8. The second moving contact piece; 9. The second moving contact; 10. The second moving bracket; 11. Moving terminal; 12. Extension spring; 13. Pressing plate; ; 14. Brake moving contact; 15. Brake static contact; 16. Brake terminal; 17. Push rod.

detailed description

The contact mechanism of a switch described in the present utility model will be further described in detail through specific embodiments below.

As shown in Figures 1, 2, and 3, a switch contact mechanism includes a static contact group, a first moving contact group, and a second moving contact group that are used in conjunction with each other. The static contact group includes a static contact piece 1, a second moving contact group A static contact 2 and a second static contact 3, the first static contact 2 and the second static contact 3 are fixedly installed on the static contact 1, the static contact 1 is fixed on the static terminal 4, the first dynamic The contact group includes a first movable contact 5 and a first movable contact 6, the middle of the first movable contact 5 is installed on the first movable bracket 7, and the first movable contact 6 is installed on one end of the first movable contact 5 , the first moving contact 6 is matched with the first static contact 2, the second moving contact group includes the second moving contact 8, the second moving contact 9 and the extension spring 12, the middle part of the second moving contact 8 is installed In the second movable bracket 10, the second movable contact 9 is installed on one end of the second movable contact 8, the second movable contact 9 matches the second static contact 3, the first movable contact 5 and the second The movable contacts 8 are arranged side by side in parallel, and the first movable contact 6 and the second movable contact 9 are arranged on the same side of the first movable contact 5 and the second movable contact 8 respectively, and the first movable bracket 7 and the second movable contact The two moving brackets 10 are all installed on the moving terminal 11, one end of the extension spring 12 is fixedly installed on the moving terminal 11, and the other end of the extension spring 12 is fixedly installed on the lower part of the second moving contact piece 8 and is close to the second moving contact 9 , the other end of the first movable contact piece 5 and the other end of the second movable contact piece 8 cooperate with the first force application part and the second force application part on the push rod assembly of the switch respectively, and the push rod The assembly controls the first movable contact 6 and the first static contact 2 to be connected earlier than the second static contact 3 and the second movable contact 9, and the push rod assembly controls the first movable contact 6 and the first static contact Point 2 is separated later than the second static contact 3 and the second movable contact 9, wherein the realization of the first connection and later separation is realized by the positions of the first force applying part and the second force applying part, that is, at the first When the force-applying part presses down the first movable contact to make the first movable contact connect with the second movable contact, the second force-applying part still presses the other end of the second movable contact so that the second static contact and the second The two moving contacts are not in contact yet. When the push rod continues to move forward, the second force application part is separated from the other end of the second moving contact piece. At this time, the second moving contact piece 8 is under the action of the extension spring 12. Make the second static contact 3 and the second moving contact 9 contact, and during actual wiring, the first moving contact group and the second moving contact group are connected in parallel, and similarly, when the push rod reverses backward, the second applying The force part will first press the other end of the second moving contact, so that the second moving contact 9 is separated from the second static contact 3. At this time, the first static contact 2 and the first moving contact 6 are still in contact. Therefore the motor is still conducting, and when the push rod continues to retreat in the opposite direction, the first force application part cooperates with the first movable contact piece to separate the first movable contact 6 from the first static contact 2.

The contact mechanism also includes a pressing plate 13 located between the first moving contact group and the second moving contact group, the pressing plate 13 is installed on the upper part of the static terminal 4 and the moving terminal 11 and presses the static terminal 4 and the moving terminal 11 against the switch. On the base, the pressing plate 13 is also provided with a matching structure that matches the push rod assembly. In the present embodiment, the pressing plate 13 is L-shaped, and the pressing plate 13 includes a horizontal plate surface and a vertical plate surface. Both the static terminal 4 and the movable terminal 11 are in tight contact with each other. Of course, the pressing plate 13 can also be of other shapes.

The matching structure includes a boss 131 arranged on the vertical plate surface and a guide groove 132 arranged on the horizontal plate surface, the boss 131 is used for installing the compression spring of the push rod assembly, and the guide groove 132 and the push rod The guide block at the bottom of the push rod in the assembly cooperates. In this embodiment, the boss 131 is a cross-shaped protrusion, and the cross-shaped protrusion cooperates with the compression spring of the push rod assembly.

The contact mechanism also includes a brake contact group. The brake contact group includes a brake contact group and a brake static contact group that cooperate with each other. The brake contact group includes a brake contact 14, and the brake contact 14 is installed on the first The other end of the moving contact piece 5, the brake static contact group includes a brake static contact 15, and the brake static contact 15 is installed on the brake terminal 16, and one end of the brake terminal 16 is installed on the base of the switch and is held by the pressure plate 13 is compressed, and when the brake moving contact 14 is in contact with the brake static contact 15, the brake contact group can realize fast braking of the motor.

The static contact piece 1 and the static terminal 4 can be integrally formed.

When in use, move the push rod 17 to the direction of the first movable contact 6 and the second movable contact 9 and press down. The moving contact 6 gradually approaches and contacts the first static contact 2. The first moving contact piece 5 is a seesaw structure. The first moving contact 6 contacts the first static contact 2 quickly. At this time, the switch is connected. The first moving contact group and the second moving contact group are connected in parallel, which realizes the rapid communication of the switch. When the push rod assembly continues to move, the second force application part is separated from the other end of the second moving contact piece 8, and the tension spring 12 Under the action, the second moving contact 9 and the second static contact 3 gradually realize contact, and after the contact, due to the effect of the pull tube 12, the second moving contact 9 and the second static contact 3 are always in stable and firm contact, adapting to strong shock environment, and when the switch needs to be disconnected, the push rod assembly moves in reverse, firstly separates the second moving contact 9 from the second static contact 3, and then separates the first moving contact 6 from the first static contact 2 Separation, because the two are connected in parallel, only when they are separated at the same time, the switch is disconnected. Therefore, after the second movable contact 9 is separated from the second static contact 3, the first movable contact 6 and the first static contact 2 are not connected. When separating, the switch is still connected, and then when the first movable contact 6 is separated from the first static contact 2, the switch is disconnected, and the first movable contact piece is a seesaw structure, and the disconnection is rapid.

Claims (7)

1. null1. the contact mechanism of a switch，It is characterized in that: include that the stationary contact group being used in conjunction with each other is dynamic with first and touch group、Second dynamic tactile group，Described stationary contact group includes static contact、First stationary contact and the second stationary contact，First stationary contact and the second stationary contact are all fixedly installed in static contact，Described static contact is fixedly installed on static terminal，First dynamic group of touching includes the first movable contact spring and the first movable contact，The middle part of the first movable contact spring is installed on first and moves support，First movable contact is installed on the one end of the first movable contact spring，First movable contact and the first stationary contact match，Second dynamic group of touching includes the second movable contact spring、Second movable contact and extension spring，The middle part of the second movable contact spring is installed on second and moves support，Second movable contact is installed on the one end of the second movable contact spring，Second movable contact and the second stationary contact match，First movable contact spring and the second movable contact spring side-by-side parallel are arranged，And first movable contact、Second movable contact is respectively arranged in the first movable contact spring and the same side of the second movable contact spring，First moves support and second moves support and is mounted on of moved end，Described extension spring one end is fixedly installed on of moved end，The other end of extension spring is fixedly installed in the second movable contact spring bottom and near the second movable contact，The other end of described first movable contact spring、The other end of second movable contact spring coordinates with the first force section on the push-rod assembly of switch and the second force section respectively，Described push-rod assembly controls the first movable contact and the first stationary contact is first connected than the second stationary contact and the second movable contact，Described push-rod assembly controls the first movable contact and the separation more late than the second stationary contact and the second movable contact of the first stationary contact.
2. The contact mechanism of a kind of switch the most as claimed in claim 1, it is characterized in that: this contact mechanism also includes at the first dynamic pressing plate touched between group and the second dynamic tactile group, this pressing plate is installed on static terminal and the top of moved end and static terminal and moved end is pressed on the pedestal of switch, and pressing plate is additionally provided with the fit structure matched with push-rod assembly.
3. The contact mechanism of a kind of switch the most as claimed in claim 2, it is characterised in that: described pressing plate is L-shaped, and pressing plate includes horizontal plate face and vertical plate face, the horizontal plate face of pressing plate and static terminal and moved end all compressive contact.
4. The contact mechanism of a kind of switch the most as claimed in claim 3, it is characterized in that: described fit structure includes the boss being arranged on vertical plate face and the gathering sill being arranged on horizontal plate face, this boss is for installing the compression spring of push-rod assembly, and described gathering sill coordinates with the guide pad bottom push rod in push-rod assembly.
5. The contact mechanism of a kind of switch the most as claimed in claim 4, it is characterised in that: described boss is that cross is protruding.
6. The contact mechanism of a kind of switch the most as claimed in claim 5, it is characterized in that: this contact mechanism also includes braking tactile group, the dynamic tactile group of brake, the brake stationary contact group that group includes cooperating is touched in described brake, the dynamic group of touching of brake includes the movable contact that brakes, described brake movable contact is installed on the other end of the first movable contact spring, brake stationary contact group includes the stationary contact that brakes, and described brake stationary contact is installed on brake terminal, and one end of described brake terminal is installed on the pedestal of switch and is compressed by pressing plate.
7. The contact mechanism of a kind of switch the most as claimed in claim 6, it is characterised in that: described static contact is one-body molded with static terminal.