CN208208576U - A kind of main contacts structure of electric tool switch - Google Patents

Abstract

A main contact structure of an electric tool switch, including a push rod, a B+ terminal, a main circuit terminal, and a moving contact bridge assembly. A slider is arranged on the push rod, and a driving device on the slider pushes the slider downward, and is connected with the moving One end of the contact bridge assembly is in contact, and the other end of the dynamic contact bridge assembly is provided with a contact, which is far away from the main circuit terminal arranged below the contact. The terminal is provided with an anti-disengagement groove, and the anti-disengagement groove clamps the moving contact bridge assembly. When working, push the push rod, and the slider on the push rod moves to the contact side of the moving contact bridge assembly, and the slider pushes downward. Tighten the contact bridge assembly so that the contacts are in contact with the main circuit terminals and the circuit is closed. In this way, a group of moving contact bridge components is added, which reduces the internal contact resistance and improves the phenomenon of excessive heating of parts during use. The anti-falling design on the B+ terminal greatly enhances the stability and reliability of the structure, and can more effectively deal with the shock and vibration when the power tool is working.

Description

A main contact structure of an electric tool switch

technical field

The utility model relates to an electric tool switch, in particular to a main contact structure of the electric tool switch.

Background technique

The electric tool switch is an intelligent circuit applied to electric tools. It is a series of operations for electric tools integrated into one switch, and meets the requirements of convenience, safety, and environmental protection. The specifications of the electric tool switch can be customized, and the parameters such as circuit design, plastic selection, and size can be designed according to the needs of the machine. The power tool switch is derived from the control requirements of power tools, and can be customized to design circuits. At present, the internal structure of general electric tool switches on the market is relatively simple, and the contact resistance at the main contact point is too large, and it is easy to generate heat when working for a long time. Some internal structures are not fixed enough, and under the condition of high-frequency vibration of electric tools, there will be cases of shedding and displacement. Due to the existence of the above problems, it is necessary for us to improve them.

Contents of the invention

Aiming at the deficiencies in the prior art, the utility model provides a main contact structure of an electric tool switch, which has a compact structure, and by reducing the setting of the internal contact resistance, it can improve the phenomenon of excessive heat generation of parts during use, and the stability of contact and Higher reliability, it can more effectively deal with the shock and vibration when the tool is working, and the internal dynamic contact bridge assembly is also equipped with a strong release design to ensure the safety of work.

The technical solution adopted by the utility model to solve the technical problem is: a main contact structure of an electric tool switch, including a push rod, a B+ terminal, a main circuit terminal and a moving contact bridge assembly, the push rod is provided with a slider, There is a driving device on the slider to press the slider downwards and contact with one end of the moving touch bridge assembly, the other end of the moving touch bridge assembly is provided with a contact point, and the contact point is far away from the The main circuit terminal below the contact, the moving contact bridge assembly is installed on the B+ terminal, the moving contact bridge assembly is provided with two, the B+ terminal is provided with an anti-slip groove, and the anti-slip The slot clamps the moving contact bridge assembly. When working, push the push rod, and the slider on the push rod moves to the contact side of the moving contact bridge assembly, and the sliding block pushes downward. Tighten the moving contact bridge assembly so that the contacts are in contact with the main circuit terminals, and the circuit is closed. In this way, a group of moving contact bridge components is added, which reduces the internal contact resistance and improves the phenomenon of excessive heating of parts during use. The anti-falling design on the B+ terminal greatly enhances the stability and reliability of the structure, and can more effectively deal with the shock and vibration when the power tool is working.

In the above technical solution, preferably, the movable contact bridge assembly is provided with a folded plate on a side close to the B+ terminal. With such setting, the strong release design can ensure the safety of the electric tool work.

In the above technical solution, preferably, the driving device is a spring. Such arrangement facilitates installation, can save interior installation space to a large extent, and makes the overall structure compact.

In the above technical solution, preferably, the push rod is also provided with a brush.

The beneficial effects of the utility model are: two moving bridge assemblies are provided, and an anti-disengagement groove is arranged on the B+ terminal, and the anti-disengagement groove clamps the moving bridge assembly, and when working, pushes the push rod, the slide block on the push rod moves to the contact side of the moving touch bridge assembly, and the slide block pushes down against the moving touch bridge assembly so that the contact point and the touch bridge assembly The main circuit terminals are in contact and the circuit is closed. In this way, a group of moving contact bridge components is added, which reduces the internal contact resistance and improves the phenomenon of excessive heating of parts during use. The anti-falling design on the B+ terminal greatly enhances the stability and reliability of the structure, and can more effectively deal with the shock and vibration when the power tool is working.

Description of drawings

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

Fig. 1 is a schematic diagram of the contact structure of the present invention.

Fig. 2 is a schematic diagram of the B+ terminal of the present invention.

Fig. 3 is a diagram of the internal structure of the push rod of the present utility model.

Fig. 4 is a structural diagram of the initial state of the utility model.

Fig. 5 is a side view of the initial state of the utility model.

Fig. 6 is a working state structure diagram of the utility model.

Fig. 7 is a side view of the working state of the utility model.

In the figure, 1. Push rod, 2. Slider, 3. Spring, 4. Moving contact bridge assembly, 5. Contact, 6. B+ terminal, 7. Main circuit terminal, 8. Anti-loosening groove, 9. Folding plate , 10. Brushes.

Detailed ways

In Fig. 1-7, a main contact structure of an electric tool switch includes a push rod 1, a B+ terminal 6, a main circuit terminal 7 and a moving contact bridge assembly 4, the push rod 1 is provided with a slider 2, so There is a spring 3 on the slider 2 to press the slider 2 downwards to contact with one end of the moving touch bridge assembly 4, and the other end of the moving touch bridge assembly 4 is provided with a contact 5, and the contact 5 Away from the main circuit terminal 7 arranged below the contact 5, the dynamic contact bridge assembly 4 is installed on the B+ terminal 6, and the dynamic contact bridge assembly 4 is provided with two, and the B+ terminal 6 An anti-off groove 8 is provided on the top, and the anti-off groove 8 clamps the moving touch bridge assembly 4. When working, push the push rod 1, and the slider 2 on the push rod 1 moves to the moving touch bridge assembly. On the side of the contact 5 of the bridge assembly 4 , the slider 2 pushes downward against the movable contact bridge assembly 4 so that the contact 5 contacts the main circuit terminal 7 and the circuit is closed. The push rod 1 is also provided with a brush 10 .

As shown in FIG. 1 , a folded plate 9 is provided on one side of the B+ terminal 6 . With such setting, the strong release design can ensure the safety of the electric tool work.

Claims (4)

1. A main contact structure of an electric tool switch, comprising a push rod, a B+ terminal, a main circuit terminal and a moving contact bridge assembly, a slide block is arranged on the push rod, and a driving device is arranged on the slide block to move the slide The block presses down to make contact with one end of the movable contact bridge assembly, and the other end of the movable contact bridge assembly is provided with a contact, the contact is far away from the main circuit terminal arranged below the contact, and the movable contact bridge assembly The contact bridge assembly is installed on the B+ terminal, and it is characterized in that: there are two movable contact bridge assemblies, and the B+ terminal is provided with an anti-disengagement groove, and the anti-disengagement groove clamps the movable contact bridge assembly , when working, push the push rod, the slider on the push rod moves to the side of the contact point of the moving contact bridge assembly, and the slider pushes down against the moving contact bridge assembly, so that The contact is in contact with the main circuit terminal, and the circuit is closed. 2 . The main contact structure of an electric tool switch according to claim 1 , wherein a folded plate is provided on a side of the movable contact bridge assembly close to the B+ terminal. 3 . 3. The main contact structure of an electric tool switch according to claim 1, wherein the driving device is a spring. 4. The main contact structure of an electric tool switch according to claim 1, characterized in that: said push rod is also provided with a brush.